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Wild AJ, Steiner FA, Kiene M, Tyborski N, Tung SY, Koehler T, Carminati A, Eder B, Groth J, Vahl WK, Wolfrum S, Lueders T, Laforsch C, Mueller CW, Vidal A, Pausch J. Unraveling root and rhizosphere traits in temperate maize landraces and modern cultivars: Implications for soil resource acquisition and drought adaptation. PLANT, CELL & ENVIRONMENT 2024; 47:2526-2541. [PMID: 38515431 DOI: 10.1111/pce.14898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 03/07/2024] [Accepted: 03/11/2024] [Indexed: 03/23/2024]
Abstract
A holistic understanding of plant strategies to acquire soil resources is pivotal in achieving sustainable food security. However, we lack knowledge about variety-specific root and rhizosphere traits for resource acquisition, their plasticity and adaptation to drought. We conducted a greenhouse experiment to phenotype root and rhizosphere traits (mean root diameter [Root D], specific root length [SRL], root tissue density, root nitrogen content, specific rhizosheath mass [SRM], arbuscular mycorrhizal fungi [AMF] colonization) of 16 landraces and 22 modern cultivars of temperate maize (Zea mays L.). Our results demonstrate that landraces and modern cultivars diverge in their root and rhizosphere traits. Although landraces follow a 'do-it-yourself' strategy with high SRLs, modern cultivars exhibit an 'outsourcing' strategy with increased mean Root Ds and a tendency towards increased root colonization by AMF. We further identified that SRM indicates an 'outsourcing' strategy. Additionally, landraces were more drought-responsive compared to modern cultivars based on multitrait response indices. We suggest that breeding leads to distinct resource acquisition strategies between temperate maize varieties. Future breeding efforts should increasingly target root and rhizosphere economics, with SRM serving as a valuable proxy for identifying varieties employing an outsourcing resource acquisition strategy.
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Affiliation(s)
- Andreas J Wild
- Agroecology, Bayreuth Center of Ecology and Environmental Research (BayCEER), University of Bayreuth, Bayreuth, Germany
| | - Franziska A Steiner
- Soil Science, TUM School of Life Sciences, Technical University of Munich, Freising, Germany
| | - Marvin Kiene
- Animal Ecology I, Bayreuth Center of Ecology and Environmental Research (BayCEER), University of Bayreuth, Bayreuth, Germany
| | - Nicolas Tyborski
- Ecological Microbiology, Bayreuth Center of Ecology and Environmental Research (BayCEER), University of Bayreuth, Bayreuth, Germany
| | - Shu-Yin Tung
- Institute for Agroecology and Organic Farming, Bavarian State Research Center for Agriculture, Freising, Germany
- School of Life Sciences, Technical University of Munich, Freising, Germany
| | - Tina Koehler
- Soil Physics, Bayreuth Center of Ecology and Environmental Research (BayCEER), University of Bayreuth, Bayreuth, Germany
- Physics of Soils and Terrestrial Ecosystems, Department of Environmental Systems Science, ETH Zurich, Zurich, Switzerland
| | - Andrea Carminati
- Physics of Soils and Terrestrial Ecosystems, Department of Environmental Systems Science, ETH Zurich, Zurich, Switzerland
| | - Barbara Eder
- Institute for Crop Science and Plant Breeding, Bavarian State Research Center for Agriculture (LfL), Freising, Germany
| | - Jennifer Groth
- Institute for Crop Science and Plant Breeding, Bavarian State Research Center for Agriculture (LfL), Freising, Germany
| | - Wouter K Vahl
- Institute for Crop Science and Plant Breeding, Bavarian State Research Center for Agriculture (LfL), Freising, Germany
| | - Sebastian Wolfrum
- Institute for Agroecology and Organic Farming, Bavarian State Research Center for Agriculture, Freising, Germany
| | - Tillmann Lueders
- Ecological Microbiology, Bayreuth Center of Ecology and Environmental Research (BayCEER), University of Bayreuth, Bayreuth, Germany
| | - Christian Laforsch
- Animal Ecology I, Bayreuth Center of Ecology and Environmental Research (BayCEER), University of Bayreuth, Bayreuth, Germany
| | - Carsten W Mueller
- Chair of Soil Science, Institute of Ecology, Technische Universitaet Berlin, Berlin, Germany
- Department of Geosciences and Natural Resource Management, University of Copenhagen, Copenhagen, Denmark
| | - Alix Vidal
- Soil Biology Group, Wageningen University, Wageningen, The Netherlands
| | - Johanna Pausch
- Agroecology, Bayreuth Center of Ecology and Environmental Research (BayCEER), University of Bayreuth, Bayreuth, Germany
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Tohtahun K, Kong D, Chai L, Mulati M, Zhao X, Dong X, Zhang W. Diversity and growth-promoting characteristics of rhizosphere bacteria of three naturally growing plants at the sand iron ore restoration area in Qinghe County. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 930:172654. [PMID: 38649044 DOI: 10.1016/j.scitotenv.2024.172654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 04/19/2024] [Accepted: 04/19/2024] [Indexed: 04/25/2024]
Abstract
It is a great challenge to restore northern mines after mining and achieve optimal results due to the extremely harsh environment and climate, as in Qinghe County of Xinjiang Province, China. Qinghe County has a climate of drought, cold, strong winds, and high altitude. After sand and iron mining, the soil in this area contains a large amount of sand and gravel with extremely low organic matter, nitrogen deficiency, and a high pH of 9.26. Our preliminary studies disclosed that only three plants, including Caligonum junceum, Atraphaxis virgata, and Melilotus albus Medic, can grow naturally in this environment without any artificial management. For effective ecology restoration, this study explored the mechanism of plant-microbial interaction and stress resistance in this environment. It was found that although the soil condition in the sand iron ore landfill area is extreme, the bacterial diversity remained high, with Shannon and Simpson indices reaching 9.135 and 0.994, respectively. The planting of three types of remediation plants did not significantly improve, or even decreased, the soil bacterial diversity index, but greatly changed the composition of dominant bacterial genera. Significant differences in the composition of rhizosphere soil bacterial communities among these three remediation plants were observed. Potential new bacterial species accounted for 9.8 %, and the proportion of unique genera reached 30 % or 50 %, respectively. Among all the isolated strains, 74 % had nitrogen fixation and other growth-promoting properties. In summary, the soil microbial community structure in this extreme environment is unique and diverse. The types of remediation plants play a major role in the composition of the rhizosphere bacterial community structure, and the recruited growth-promoting bacteria are diverse and functional. This study may offer valuable information for further studies in vegetation restoration and aid in ecology restoration, especially under extreme conditions.
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Affiliation(s)
- Kawsar Tohtahun
- School of Life Sciences, Xinjiang Normal University, Xinyi Road, Urumqi 830046, The People's Republic of China; Xinjiang Key Laboratory of Special Species Conservation and Regulatory Biology, Urumqi 830046, The People's Republic of China
| | - Delong Kong
- School of Life Sciences, Xinjiang Normal University, Xinyi Road, Urumqi 830046, The People's Republic of China; Xinjiang Key Laboratory of Special Species Conservation and Regulatory Biology, Urumqi 830046, The People's Republic of China
| | - Lili Chai
- School of Life Sciences, Xinjiang Normal University, Xinyi Road, Urumqi 830046, The People's Republic of China; Xinjiang Key Laboratory of Special Species Conservation and Regulatory Biology, Urumqi 830046, The People's Republic of China
| | - Mila Mulati
- School of Life Sciences, Xinjiang Normal University, Xinyi Road, Urumqi 830046, The People's Republic of China; Xinjiang Key Laboratory of Special Species Conservation and Regulatory Biology, Urumqi 830046, The People's Republic of China
| | - Xiaoying Zhao
- School of Life Sciences, Xinjiang Normal University, Xinyi Road, Urumqi 830046, The People's Republic of China
| | - Xiuli Dong
- School of Osteopathic Medicine, Campbell University, 4350 US Hwy 421 S, Lillington, NC 27546, USA.
| | - Wei Zhang
- School of Life Sciences, Xinjiang Normal University, Xinyi Road, Urumqi 830046, The People's Republic of China; Xinjiang Key Laboratory of Special Species Conservation and Regulatory Biology, Urumqi 830046, The People's Republic of China.
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Fang Y, Lu L, Chen K, Wang X. Tradeoffs among root functional traits for phosphorus acquisition in 13 soybean genotypes contrasting in mycorrhizal colonization. ANNALS OF BOTANY 2024; 134:179-190. [PMID: 38642143 PMCID: PMC11161561 DOI: 10.1093/aob/mcae060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Accepted: 04/17/2024] [Indexed: 04/22/2024]
Abstract
BACKGROUND AND AIMS Plants have adapted to acquire phosphorus (P) primarily through advantageous root morphologies, responsive physiological pathways and associations with mycorrhizal fungi. Yet, to date, little information exists on how variation in arbuscular mycorrhizal (AM) colonization is coordinated with root morphological and physiological traits to enhance P acquisition. METHODS Thirteen root functional traits associated with P acquisition were characterized at full bloom stage in pot cultures under low soil P availability conditions for 13 soybean genotypes contrasting in AM colonization. KEY RESULTS Significant variation in root functional traits was observed in response to low P stress among the 13 tested soybean genotypes contrasting in AM colonization. Genotypes with low AM colonization exhibited greater root proliferation but with less advantageous root physiological characteristics for P acquisition. In contrast, genotypes with high AM colonization exhibited less root growth but higher phosphatase activities and carboxylate content in the rhizosheath. Root dry weights, and contents of carbon and P were positively correlated with root morphological traits of different root orders and whole root systems, and were negatively correlated with AM colonization of fine roots and whole root systems, as well as rhizosheath phosphatase activities and carboxylate contents. These results taken in combination with a significant positive correlation between plant P content and root morphological traits indicate that root morphological traits play a primary role in soybean P acquisition. CONCLUSIONS The results suggest that efficient P acquisition involves tradeoffs among carbon allocation to root proliferation, mycorrhizal symbiosis or P-mobilizing exudation. Complementarity and complexity in the selection of P acquisition strategies was notable among soybean genotypes contrasting in AM colonization, which is closely related to plant C budgeting.
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Affiliation(s)
- Yizeng Fang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Root Biology Center, South China Agricultural University, Guangzhou 510642, China
| | - Luwen Lu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Root Biology Center, South China Agricultural University, Guangzhou 510642, China
| | - Kang Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Root Biology Center, South China Agricultural University, Guangzhou 510642, China
| | - Xiurong Wang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Root Biology Center, South China Agricultural University, Guangzhou 510642, China
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Gholizadeh S, Nemati I, Vestergård M, Barnes CJ, Kudjordjie EN, Nicolaisen M. Harnessing root-soil-microbiota interactions for drought-resilient cereals. Microbiol Res 2024; 283:127698. [PMID: 38537330 DOI: 10.1016/j.micres.2024.127698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 03/14/2024] [Accepted: 03/17/2024] [Indexed: 04/17/2024]
Abstract
Cereal plants form complex networks with their associated microbiome in the soil environment. A complex system including variations of numerous parameters of soil properties and host traits shapes the dynamics of cereal microbiota under drought. These multifaceted interactions can greatly affect carbon and nutrient cycling in soil and offer the potential to increase plant growth and fitness under drought conditions. Despite growing recognition of the importance of plant microbiota to agroecosystem functioning, harnessing the cereal root microbiota remains a significant challenge due to interacting and synergistic effects between root traits, soil properties, agricultural practices, and drought-related features. A better mechanistic understanding of root-soil-microbiota associations could lead to the development of novel strategies to improve cereal production under drought. In this review, we discuss the root-soil-microbiota interactions for improving the soil environment and host fitness under drought and suggest a roadmap for harnessing the benefits of these interactions for drought-resilient cereals. These methods include conservative trait-based approaches for the selection and breeding of plant genetic resources and manipulation of the soil environments.
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Affiliation(s)
- Somayeh Gholizadeh
- Faculty of Technical Sciences, Department of Agroecology, Aarhus University, Forsøgsvej 1, Slagelse 4200, Denmark
| | - Iman Nemati
- Department of Plant Production and Genetics Engineering, Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili, Ardabil, Iran
| | - Mette Vestergård
- Faculty of Technical Sciences, Department of Agroecology, Aarhus University, Forsøgsvej 1, Slagelse 4200, Denmark
| | - Christopher James Barnes
- Faculty of Technical Sciences, Department of Agroecology, Aarhus University, Forsøgsvej 1, Slagelse 4200, Denmark
| | - Enoch Narh Kudjordjie
- Faculty of Technical Sciences, Department of Agroecology, Aarhus University, Forsøgsvej 1, Slagelse 4200, Denmark
| | - Mogens Nicolaisen
- Faculty of Technical Sciences, Department of Agroecology, Aarhus University, Forsøgsvej 1, Slagelse 4200, Denmark.
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Wang R, Dijkstra FA, Han X, Jiang Y. Root nitrogen reallocation: what makes it matter? TRENDS IN PLANT SCIENCE 2024:S1360-1385(24)00114-6. [PMID: 38825557 DOI: 10.1016/j.tplants.2024.04.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 04/21/2024] [Accepted: 04/30/2024] [Indexed: 06/04/2024]
Abstract
Root nitrogen (N) reallocation involves remobilization of root N-storage pools to support shoot growth. Representing a critical yet underexplored facet of plant function, we developed innovative frameworks to elucidate its connections with key ecosystem components. First, root N reallocation increases with plant species richness and N-acquisition strategies, driven by competitive stimulation of plant N demand and synergies in N uptake. Second, competitive root traits and mycorrhizal symbioses, which enhance N foraging and uptake, exhibit trade-offs with root N reallocation. Furthermore, root N reallocation is attenuated by N-supply attributes such as increasing litter quality, soil fungi-to-bacteria ratios, and microbial recruitment in the hyphosphere/rhizosphere. These frameworks provide new insights and research avenues for understanding the ecological roles of root N reallocation.
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Affiliation(s)
- Ruzhen Wang
- School of Life Sciences, Hebei University, Baoding 071002, China; Erguna Forest-Steppe Ecotone Ecosystem Research Station, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
| | - Feike A Dijkstra
- Sydney Institute of Agriculture, School of Life and Environmental Sciences, The University of Sydney, Camden, NSW 2570, Australia
| | - Xingguo Han
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
| | - Yong Jiang
- School of Life Sciences, Hebei University, Baoding 071002, China; Erguna Forest-Steppe Ecotone Ecosystem Research Station, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China.
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Wang L, Zhang B, Fang Y, Yin H, Fu S, Chang SX, Cai Y. Distinct effects of canopy vs understory and organic vs inorganic N deposition on root resource acquisition strategies of subtropical Moso bamboo plants. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 927:172424. [PMID: 38614348 DOI: 10.1016/j.scitotenv.2024.172424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 04/07/2024] [Accepted: 04/10/2024] [Indexed: 04/15/2024]
Abstract
Atmospheric nitrogen (N) deposition inevitably alters soil nutrient status, subsequently prompting plants to modify their root morphology (i.e., adopting a do-it-yourself strategy), mycorrhizal symbioses (i.e., outsourcing strategy), and root exudation (i.e., nutrient-mining strategy) linking with resource acquisition. However, how N deposition influences the integrated pattern of these resource-acquisition strategies remains unclear. Furthermore, most studies in forest ecosystems have focused on understory N and inorganic N deposition, neglecting canopy-associated processes (e.g., N interception and assimilation) and the impacts of organic N on root functional traits. In this study, we compared the effects of canopy vs understory, organic vs inorganic N deposition on eight root functional traits of Moso bamboo plants. Our results showed that N deposition significantly decreased arbuscular mycorrhizal fungi (AMF) colonization, altered root exudation rate and root foraging traits (branching intensity, specific root area, and length), but did not influence root tissue density and N concentration. Moreover, the impacts of N deposition on root functional traits varied significantly with deposition approach (canopy vs. understory), form (organic vs. inorganic), and their interaction, showing variations in both intensity and direction (positive/negative). Furthermore, specific root area and length were positively correlated with AMF colonization under canopy N deposition and root exudation rate in understory N deposition. Root trait variation under understory N deposition, but not under canopy N deposition, was classified into the collaboration gradient and the conservation gradient. These findings imply that coordination of nutrient-acquisition strategies dependent on N deposition approach. Overall, this study provides a holistic understanding of the impacts of N deposition on root resource-acquisition strategies. Our results indicate that the evaluation of N deposition on fine roots in forest ecosystems might be biased if N is added understory.
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Affiliation(s)
- Lin Wang
- State Key Laboratory of Subtropical Silviculture, College of Environment and Resources, College of Carbon Neutrality, Zhejiang A&F University, Hangzhou 311300, China
| | - Baogang Zhang
- State Key Laboratory of Subtropical Silviculture, College of Environment and Resources, College of Carbon Neutrality, Zhejiang A&F University, Hangzhou 311300, China.
| | - Yunying Fang
- Australian Rivers Institute and School of Environment and Science, Griffith University, Nathan Campus, 4111, Queensland, Australia
| | - Huajun Yin
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province & China-Croatia "Belt and Road" Joint Laboratory on Biodiversity and Ecosystem Services, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, China
| | - Shenglei Fu
- College of Environment and Planning, Henan University, Kaifeng 475004, China
| | - Scott X Chang
- Department of Renewable Resources, University of Alberta, Edmonton T6G 2E3, Canada
| | - Yanjiang Cai
- State Key Laboratory of Subtropical Silviculture, College of Environment and Resources, College of Carbon Neutrality, Zhejiang A&F University, Hangzhou 311300, China
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Hao Y, Li J, Li Z, Peng Y, Hussain S, Fu T, Li H, Chang J, Chen L, Zhang B. Greenhouse gas emissions and their driving factors among different flowering Chinese cabbage (Brassica campestris L.) varieties. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024:10.1007/s11356-024-33769-x. [PMID: 38795300 DOI: 10.1007/s11356-024-33769-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2024] [Accepted: 05/19/2024] [Indexed: 05/27/2024]
Abstract
Crop cultivars have an influence on greenhouse gas (GHG) emissions, and there is variation between varieties. However, there are few reports available on the differences in GHG emissions and their driving factors among vegetable varieties. In this study, we conducted a field experiment to examine the variances in GHG emissions and their contributing factors among eight flowering Chinese cabbage varieties (considering growth period, leaf shape, and colour). The results showed significant differences in GHG emissions within varieties; early-maturing varieties exhibited GHG by 25.6% and 15.3%, respectively, when compared to mid- and late-maturing varieties. Among the different leaf types and color classifications, light-colored and sharp-leafed varieties had the lower global warming potential (GWP) overall. Cumulative CO2 emissions were influenced by leaf SPAD values and biomass, while cumulative N2O emissions were driven mainly by stem thickness, carbon accumulation, leaf SPAD values, and biomass. In summary, the selection of light-colored varieties with pointed leaves and shorter growth periods in actual production contributed positively to the reduction of carbon emissions from flowering Chinese cabbage production. Through efficient variety screening, this study provides a win-win strategy for achieving efficient vegetable production while also addressing the global climate challenge.
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Affiliation(s)
- Yongzhou Hao
- Key Laboratory for New Technology Research of Vegetables, Vegetable Research Institute, Guangdong Academy of Agricultural Science, No.66, Jinying Road, Tianhe District, Guangzhou, 510640, China
- Faculty of Food Science and Engineering, Foshan University, Foshan, 258000, China
| | - Jing Li
- Key Laboratory for New Technology Research of Vegetables, Vegetable Research Institute, Guangdong Academy of Agricultural Science, No.66, Jinying Road, Tianhe District, Guangzhou, 510640, China
| | - Zhen Li
- Key Laboratory for New Technology Research of Vegetables, Vegetable Research Institute, Guangdong Academy of Agricultural Science, No.66, Jinying Road, Tianhe District, Guangzhou, 510640, China
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops; Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, College of Crop Science, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Yutao Peng
- School of Agriculture, Sun Yat-sen University, Shenzhen, 518107, China
| | - Shahid Hussain
- Key Laboratory for New Technology Research of Vegetables, Vegetable Research Institute, Guangdong Academy of Agricultural Science, No.66, Jinying Road, Tianhe District, Guangzhou, 510640, China
| | - Tianhong Fu
- Key Laboratory for New Technology Research of Vegetables, Vegetable Research Institute, Guangdong Academy of Agricultural Science, No.66, Jinying Road, Tianhe District, Guangzhou, 510640, China
| | - Hongzhao Li
- Key Laboratory for New Technology Research of Vegetables, Vegetable Research Institute, Guangdong Academy of Agricultural Science, No.66, Jinying Road, Tianhe District, Guangzhou, 510640, China
- Faculty of Food Science and Engineering, Foshan University, Foshan, 258000, China
| | - Jingjing Chang
- Key Laboratory for New Technology Research of Vegetables, Vegetable Research Institute, Guangdong Academy of Agricultural Science, No.66, Jinying Road, Tianhe District, Guangzhou, 510640, China
| | - Lei Chen
- Key Laboratory for New Technology Research of Vegetables, Vegetable Research Institute, Guangdong Academy of Agricultural Science, No.66, Jinying Road, Tianhe District, Guangzhou, 510640, China
| | - Baige Zhang
- Key Laboratory for New Technology Research of Vegetables, Vegetable Research Institute, Guangdong Academy of Agricultural Science, No.66, Jinying Road, Tianhe District, Guangzhou, 510640, China.
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Liu Q, Chen Y, Chen Y. Nitrogen acquisition strategy shifts with tree age depending on root functional traits and soil properties in Larix principis-rupprechtii plantations. FRONTIERS IN PLANT SCIENCE 2024; 15:1358367. [PMID: 38533407 PMCID: PMC10964345 DOI: 10.3389/fpls.2024.1358367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Accepted: 02/14/2024] [Indexed: 03/28/2024]
Abstract
Introduction Variation in plant nitrogen uptake rate and substrate preference is complicated due to the combined influence of abiotic and biotic factors. For the same species of tree across different ages, the interactions between root structural traits, nitrogen uptake rate, and soil environment have not been fully characterized, a situation that constrains our understanding of underground resource strategies employed by trees at different ages. Methods In the present study, we examined the nitrogen uptake rate, mycorrhiza, morphology, architecture, and chemistry of the roots of Larix principis-rupprechtii in a chronosequence (aged 18, 27, 37, 46, and 57 years) in the Saihanba Mechanical Forest Farm in Northern China. Results L. principis-rupprechtii preferred to absorb ammonium, followed in order by glycine and nitrate. The ammonium uptake rate of L. principis-rupprechtii significantly decreased (aged 18-37 years) and then increased (aged 46-57 years) with tree age. The glycine, nitrate, and total nitrogen uptake rates decreased with tree age. The root resource acquisition strategy appeared to shift from an acquisitive strategy to a conservative strategy associated with increasing tree age. Discussion Along the root-mycorrhizal collaboration gradient, the younger L. principis-rupprechtii relied more on their own root morphology and physiology to acquire resources, adopting a "do it yourself" strategy comprising increasing the specific root length, the specific root area, and the N uptake rate (nitrate and glycine). Conversely, older trees depended more on mycorrhizal partners to acquire nitrogen resources, an "outsourcing" strategy. The results contribute to our understanding of underground resource-use strategies of plants and the nitrogen cycle in forest ecosystems according to stand age.
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Affiliation(s)
- Qianyuan Liu
- Hebei Key Laboratory of Environmental Change and Ecological Construction, School of Geographical Sciences, Hebei Normal University, Shijiazhuang, China
- Geography Postdoctoral Research Station at Hebei Normal University, Shijiazhuang, China
| | - Yaxuan Chen
- Hebei Key Laboratory of Environmental Change and Ecological Construction, School of Geographical Sciences, Hebei Normal University, Shijiazhuang, China
| | - Yanmei Chen
- Hebei Key Laboratory of Environmental Change and Ecological Construction, School of Geographical Sciences, Hebei Normal University, Shijiazhuang, China
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Yue H, Sun X, Wang T, Zhang A, Han D, Wei G, Song W, Shu D. Host genotype-specific rhizosphere fungus enhances drought resistance in wheat. MICROBIOME 2024; 12:44. [PMID: 38433268 PMCID: PMC10910722 DOI: 10.1186/s40168-024-01770-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Accepted: 01/29/2024] [Indexed: 03/05/2024]
Abstract
BACKGROUND The severity and frequency of drought are expected to increase substantially in the coming century and dramatically reduce crop yields. Manipulation of rhizosphere microbiomes is an emerging strategy for mitigating drought stress in agroecosystems. However, little is known about the mechanisms underlying how drought-resistant plant recruitment of specific rhizosphere fungi enhances drought adaptation of drought-sensitive wheats. Here, we investigated microbial community assembly features and functional profiles of rhizosphere microbiomes related to drought-resistant and drought-sensitive wheats by amplicon and shotgun metagenome sequencing techniques. We then established evident linkages between root morphology traits and putative keystone taxa based on microbial inoculation experiments. Furthermore, root RNA sequencing and RT-qPCR were employed to explore the mechanisms how rhizosphere microbes modify plant response traits to drought stresses. RESULTS Our results indicated that host plant signature, plant niche compartment, and planting site jointly contribute to the variation of soil microbiome assembly and functional adaptation, with a relatively greater effect of host plant signature observed for the rhizosphere fungi community. Importantly, drought-resistant wheat (Yunhan 618) possessed more diverse bacterial and fungal taxa than that of the drought-sensitive wheat (Chinese Spring), particularly for specific fungal species. In terms of microbial interkingdom association networks, the drought-resistant variety possessed more complex microbial networks. Metagenomics analyses further suggested that the enriched rhizosphere microbiomes belonging to the drought-resistant cultivar had a higher investment in energy metabolism, particularly in carbon cycling, that shaped their distinctive drought tolerance via the mediation of drought-induced feedback functional pathways. Furthermore, we observed that host plant signature drives the differentiation in the ecological role of the cultivable fungal species Mortierella alpine (M. alpina) and Epicoccum nigrum (E. nigrum). The successful colonization of M. alpina on the root surface enhanced the resistance of wheats in response to drought stresses via activation of drought-responsive genes (e.g., CIPK9 and PP2C30). Notably, we found that lateral roots and root hairs were significantly suppressed by co-colonization of a drought-enriched fungus (M. alpina) and a drought-depleted fungus (E. nigrum). CONCLUSIONS Collectively, our findings revealed host genotypes profoundly influence rhizosphere microbiome assembly and functional adaptation, as well as it provides evidence that drought-resistant plant recruitment of specific rhizosphere fungi enhances drought tolerance of drought-sensitive wheats. These findings significantly underpin our understanding of the complex feedbacks between plants and microbes during drought, and lay a foundation for steering "beneficial keystone biome" to develop more resilient and productive crops under climate change. Video Abstract.
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Affiliation(s)
- Hong Yue
- College of Agronomy, National Key Laboratory of Crop Improvement for Stress Tolerance and Production, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Xuming Sun
- College of Agronomy, National Key Laboratory of Crop Improvement for Stress Tolerance and Production, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Tingting Wang
- College of Agronomy, National Key Laboratory of Crop Improvement for Stress Tolerance and Production, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Ali Zhang
- College of Agronomy, National Key Laboratory of Crop Improvement for Stress Tolerance and Production, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Dejun Han
- College of Agronomy, National Key Laboratory of Crop Improvement for Stress Tolerance and Production, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Gehong Wei
- College of Life Sciences, National Key Laboratory of Crop Improvement for Stress Tolerance and Production, Northwest A&F University, Yangling, Shaanxi, 712100, China.
- Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, Yangling, Shaanxi, 712100, China.
| | - Weining Song
- College of Agronomy, National Key Laboratory of Crop Improvement for Stress Tolerance and Production, Northwest A&F University, Yangling, Shaanxi, 712100, China.
| | - Duntao Shu
- College of Life Sciences, National Key Laboratory of Crop Improvement for Stress Tolerance and Production, Northwest A&F University, Yangling, Shaanxi, 712100, China.
- Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, Yangling, Shaanxi, 712100, China.
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10
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Li H, Wang C, Zhang B, Liu H, Hammond JP, Wang X, Ding G, Cai H, Wang S, Xu F, Shi L. Trade-offs between root-secreted acid phosphatase and root morphology traits, and their contribution to phosphorus acquisition in Brassica napus. PHYSIOLOGIA PLANTARUM 2024; 176:e14247. [PMID: 38499953 DOI: 10.1111/ppl.14247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 02/20/2024] [Accepted: 02/29/2024] [Indexed: 03/20/2024]
Abstract
Oilseed rape (Brassica napus) is one of the most important oil crops in the world and shows sensitivity to low phosphorus (P) availability. In many soils, organic P (Po) is the main component of the soil P pool. Po must be mineralised to Pi through phosphatases, and then taken up by plants. However, the relationship between root-secreted acid phosphatases (APase) and root morphology traits, two important P-acquisition strategies in response to P deficiency, is unclear among B. napus genotypes. This study aimed to understand their relationship and how they affect P acquisition, which is crucial for the sustainable utilisation of agricultural P resources. This study showed significant genotypic variations in root-secreted APase activity per unit root fresh weight (SAP) and total root-secreted APase activity per plant (total SAP) among 350 B. napus genotypes. Seed yield was positively correlated with total SAP but not significantly correlated with SAP. Six root traits of 18 B. napus genotypes with contrasting root biomass were compared under normal Pi, low Pi and Po. Genotypes with longer total root length (TRL) reduced SAP, but those with shorter TRL increased SAP under P deficiency. Additionally, TRL was important in P-acquisition under three P treatments, and total SAP was also important in P-acquisition under Po treatment. In conclusion, trade-offs existed between the two P-acquisition strategies among B. napus genotypes under P-deficient conditions. Total SAP was an important root trait under Po conditions. These results might help to breed B. napus with greater P-acquisition ability under low P availability conditions.
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Affiliation(s)
- Hao Li
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, China
- Microelement Research Centre, Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan, China
| | - Chuang Wang
- Microelement Research Centre, Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan, China
| | - Bingbing Zhang
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, China
- Microelement Research Centre, Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan, China
| | - Haijiang Liu
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, China
- Microelement Research Centre, Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan, China
| | - John P Hammond
- School of Agriculture, Policy and Development, University of Reading, Reading, UK
| | - Xiaohua Wang
- College of Agriculture and Forestry Science, Linyi University, Linyi, China
| | - Guangda Ding
- Microelement Research Centre, Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan, China
| | - Hongmei Cai
- Microelement Research Centre, Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan, China
| | - Sheliang Wang
- Microelement Research Centre, Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan, China
| | - Fangsen Xu
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, China
- Microelement Research Centre, Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan, China
| | - Lei Shi
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, China
- Microelement Research Centre, Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan, China
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11
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Delory BM, Callaway RM, Semchenko M. A trait-based framework linking the soil metabolome to plant-soil feedbacks. THE NEW PHYTOLOGIST 2024; 241:1910-1921. [PMID: 38124274 DOI: 10.1111/nph.19490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Accepted: 11/30/2023] [Indexed: 12/23/2023]
Abstract
By modifying the biotic and abiotic properties of the soil, plants create soil legacies that can affect vegetation dynamics through plant-soil feedbacks (PSF). PSF are generally attributed to reciprocal effects of plants and soil biota, but these interactions can also drive changes in the identity, diversity and abundance of soil metabolites, leading to more or less persistent soil chemical legacies whose role in mediating PSF has rarely been considered. These chemical legacies may interact with microbial or nutrient legacies to affect species coexistence. Given the ecological importance of chemical interactions between plants and other organisms, a better understanding of soil chemical legacies is needed in community ecology. In this Viewpoint, we aim to: highlight the importance of belowground chemical interactions for PSF; define and integrate soil chemical legacies into PSF research by clarifying how the soil metabolome can contribute to PSF; discuss how functional traits can help predict these plant-soil interactions; propose an experimental approach to quantify plant responses to the soil solution metabolome; and describe a testable framework relying on root economics and seed dispersal traits to predict how plant species affect the soil metabolome and how they could respond to soil chemical legacies.
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Affiliation(s)
- Benjamin M Delory
- Institute of Ecology, Leuphana University of Lüneburg, Lüneburg, 21335, Germany
- Copernicus Institute of Sustainable Development, Utrecht University, Utrecht, 3584 CB, the Netherlands
| | - Ragan M Callaway
- Division of Biological Sciences and Institute on Ecosystems, University of Montana, Missoula, MT, 59812, USA
| | - Marina Semchenko
- Institute of Ecology and Earth Sciences, University of Tartu, Liivi 2, 50409, Tartu, Estonia
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12
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Scheifes DJP, Te Beest M, Olde Venterink H, Jansen A, Kinsbergen DTP, Wassen MJ. The plant root economics space in relation to nutrient limitation in Eurasian herbaceous plant communities. Ecol Lett 2024; 27:e14402. [PMID: 38511333 DOI: 10.1111/ele.14402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 02/16/2024] [Accepted: 02/16/2024] [Indexed: 03/22/2024]
Abstract
Plant species occupy distinct niches along a nitrogen-to-phosphorus (N:P) gradient, yet there is no general framework for belowground nutrient acquisition traits in relation to N or P limitation. We retrieved several belowground traits from databases, placed them in the "root economics space" framework, and linked these to a dataset of 991 plots in Eurasian herbaceous plant communities, containing plant species composition, aboveground community biomass and tissue N and P concentrations. Our results support that under increasing N:P ratio, belowground nutrient acquisition strategies shift from "fast" to "slow" and from "do-it-yourself" to "outsourcing", with alternative "do-it-yourself" to "outsourcing" strategies at both ends of the spectrum. Species' mycorrhizal capacity patterns conflicted with root economics space predictions based on root diameter, suggesting evolutionary development of alternative strategies under P limitation. Further insight into belowground strategies along nutrient stoichiometry is crucial for understanding the high abundance of threatened plant species under P limitation.
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Affiliation(s)
- Daniil J P Scheifes
- Copernicus Institute of Sustainable Development, Utrecht University, Utrecht, The Netherlands
| | - Mariska Te Beest
- Copernicus Institute of Sustainable Development, Utrecht University, Utrecht, The Netherlands
- Centre for African Conservation Ecology, Nelson Mandela University, Gqeberha, South Africa
| | | | - André Jansen
- Jansen-de Hullu Landschapsecologie en Circulair, Zutphen, The Netherlands
| | - Daan T P Kinsbergen
- Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, The Netherlands
| | - Martin J Wassen
- Copernicus Institute of Sustainable Development, Utrecht University, Utrecht, The Netherlands
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13
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Sun D, Rozmoš M, Kotianová M, Hršelová H, Jansa J. Arbuscular mycorrhizal fungi suppress ammonia-oxidizing bacteria but not archaea across agricultural soils. Heliyon 2024; 10:e26485. [PMID: 38444950 PMCID: PMC10912043 DOI: 10.1016/j.heliyon.2024.e26485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 02/06/2024] [Accepted: 02/14/2024] [Indexed: 03/07/2024] Open
Abstract
Arbuscular mycorrhizal (AM) fungi are supposedly competing with ammonia-oxidizing microorganisms (AO) for soil nitrogen in form of ammonium. Despite a few studies directly addressing AM fungal and AO interactions, mostly in artificial cultivation substrates, it is not yet clear whether AM fungi can effectively suppress AO in field soils containing complex indigenous microbiomes. To fill this knowledge gap, we conducted compartmentalized pot experiments using four pairs of cropland and grassland soils with varying physicochemical properties. To exclude the interference of roots, a fine nylon mesh was used to separate the rhizosphere and mesh bags, with the latter being filled with unsterile field soils. Inoculation of plants with AM fungus Rhizophagus irregularis LPA9 suppressed AO bacteria (AOB) but not archaea (AOA) in the soils, indicating how soil nitrification could be suppressed by AM fungal presence/activity. In addition, in rhizosphere filled with artificial substrate, AM inoculation did suppress both AOB and AOA, implying more complex interactions between roots, AO, and AM fungi. Besides, we also observed that indigenous AM fungi contained in the field soils eventually did colonize the roots of plants behind the root barrier, and that the extent of such colonization was higher if the soil has previously been taken from cropland than from grassland. Despite this, the effect of experimental AM fungal inoculation on suppression of indigenous AOB in the unsterile field soils did not vanish. It seems that studying processes at a finer temporal scale, using larger buffer zones between rhizosphere and mesh bags, and/or detailed characterization of indigenous AM fungal and AO communities would be needed to uncover further details of the biotic interactions between the AM fungi and indigenous soil AO.
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Affiliation(s)
- Daquan Sun
- Laboratory of Fungal Biology, Institute of Microbiology, Czech Academy of Sciences, Vídeňská 1083, 14220 Praha 4, Czech Republic
| | - Martin Rozmoš
- Laboratory of Fungal Biology, Institute of Microbiology, Czech Academy of Sciences, Vídeňská 1083, 14220 Praha 4, Czech Republic
| | - Michala Kotianová
- Laboratory of Fungal Biology, Institute of Microbiology, Czech Academy of Sciences, Vídeňská 1083, 14220 Praha 4, Czech Republic
| | - Hana Hršelová
- Laboratory of Fungal Biology, Institute of Microbiology, Czech Academy of Sciences, Vídeňská 1083, 14220 Praha 4, Czech Republic
| | - Jan Jansa
- Laboratory of Fungal Biology, Institute of Microbiology, Czech Academy of Sciences, Vídeňská 1083, 14220 Praha 4, Czech Republic
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14
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Yao B, Shi G, Zhou H, Zhao X, Peñuelas J, Sardans J, Wang F, Wang Z. Uneven distributions of unique species promoting N niche complementarity explain the stability of degraded alpine meadow. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 911:168487. [PMID: 37977375 DOI: 10.1016/j.scitotenv.2023.168487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 11/08/2023] [Accepted: 11/09/2023] [Indexed: 11/19/2023]
Abstract
Alpine meadow degradation, usually involving decreased soil nitrogen (N) and patchy landscapes, is a challenge for natural restoration. However, the mechanism underlying plant species coexistence under degradation is unclear. In this study, we evaluated plant N niche complementarity in degraded alpine meadows on the Qinghai-Tibet Plateau using a 15N-labeling (15NO3-, 15NH4+, and 15N-glycine) experiment. At the community level, the concentration of 15NO3- in the degraded alpine meadow was 1.5 times higher than that in the undegraded alpine meadow; both alpine meadows had a significant preference for NO3- (60.72 % and 66.84 % for the degraded and undegraded alpine meadows, respectively), and the degree of glycine preference was significantly higher in the degraded alpine meadow (30.77 %) relative to the undegraded alpine meadow (21.85 %). At the species level, dominant species in both alpine meadows consistently preferred NO3-; the generalist species that can be found in both meadows and unique species of the two alpine meadows generally showed NO3- preferences, while the other plant species that were unevenly distributed in the degraded alpine meadow tended to show increased utilization of glycine, which could reduce N competition. We observed that differentiation among N sources and the uneven distribution of unique species may explain the stability of degraded alpine meadows. Our results suggested that uneven distributions of plants could have strong impacts on community stability and highlighted the importance of considering fine-scale analysis in studies of niche theory. This study has important implications for the restoration of degraded alpine meadows.
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Affiliation(s)
- Buqing Yao
- Key Laboratory of Adaptation and Evolution of Plateau Biota, the Chinese Academy of Sciences, Xining 810008, China; Key Laboratory of Restoration Ecology of Cold Area in Qinghai Province, Northwest Institute of Plateau Biology, the Chinese Academy of Sciences, Xining 810008, China
| | - Guoxi Shi
- Key Laboratory of Utilization of Agriculture Solid Waste Resources, College of Bioengineering and Biotechnology, Tianshui Normal University, Tianshui 741000, China
| | - Huakun Zhou
- Key Laboratory of Restoration Ecology of Cold Area in Qinghai Province, Northwest Institute of Plateau Biology, the Chinese Academy of Sciences, Xining 810008, China
| | - Xinquan Zhao
- College of Ecological and Environmental Engineering, State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining 810016, China
| | - Josep Peñuelas
- CSIC, Global Ecology Unit, CREAF-CSIC-UAB, Bellaterra, Catalonia 08193, Spain; CREAF, Cerdanyola del Vallès, Catalonia 08193, Spain
| | - Jordi Sardans
- CSIC, Global Ecology Unit, CREAF-CSIC-UAB, Bellaterra, Catalonia 08193, Spain; CREAF, Cerdanyola del Vallès, Catalonia 08193, Spain
| | - Fangping Wang
- College of Ecological and Environmental Engineering, State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining 810016, China.
| | - Zhiqiang Wang
- Sichuan Zoige Alpine Wetland Ecosystem National Observation and Research Station, Southwest Minzu University, Chengdu 610041, China; Institute of Qinghai-Tibetan Plateau, Southwest Minzu University, Chengdu 610041, China.
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15
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Määttä T, Malhotra A. The hidden roots of wetland methane emissions. GLOBAL CHANGE BIOLOGY 2024; 30:e17127. [PMID: 38337165 DOI: 10.1111/gcb.17127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 11/24/2023] [Accepted: 12/02/2023] [Indexed: 02/12/2024]
Abstract
Wetlands are the largest natural source of methane (CH4 ) globally. Climate and land use change are expected to alter CH4 emissions but current and future wetland CH4 budgets remain uncertain. One important predictor of wetland CH4 flux, plants, play an important role in providing substrates for CH4 -producing microbes, increasing CH4 consumption by oxygenating the rhizosphere, and transporting CH4 from soils to the atmosphere. Yet, there remain various mechanistic knowledge gaps regarding the extent to which plant root systems and their traits influence wetland CH4 emissions. Here, we present a novel conceptual framework of the relationships between a range of root traits and CH4 processes in wetlands. Based on a literature review, we propose four main CH4 -relevant categories of root function: gas transport, carbon substrate provision, physicochemical influences and root system architecture. Within these categories, we discuss how individual root traits influence CH4 production, consumption, and transport (PCT). Our findings reveal knowledge gaps concerning trait functions in physicochemical influences, and the role of mycorrhizae and temporal root dynamics in PCT. We also identify priority research needs such as integrating trait measurements from different root function categories, measuring root-CH4 linkages along environmental gradients, and following standardized root ecology protocols and vocabularies. Thus, our conceptual framework identifies relevant belowground plant traits that will help improve wetland CH4 predictions and reduce uncertainties in current and future wetland CH4 budgets.
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Affiliation(s)
- Tiia Määttä
- Department of Geography, University of Zürich, Zürich, Switzerland
| | - Avni Malhotra
- Department of Geography, University of Zürich, Zürich, Switzerland
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, Washington, USA
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16
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Nasr Esfahani M, Sonnewald U. Unlocking dynamic root phenotypes for simultaneous enhancement of water and phosphorus uptake. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 207:108386. [PMID: 38280257 DOI: 10.1016/j.plaphy.2024.108386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 01/08/2024] [Accepted: 01/17/2024] [Indexed: 01/29/2024]
Abstract
Phosphorus (P) and water are crucial for plant growth, but their availability is challenged by climate change, leading to reduced crop production and global food security. In many agricultural soils, crop productivity is confronted by both water and P limitations. The diminished soil moisture decreases available P due to reduced P diffusion, and inadequate P availability diminishes tissue water status through modifications in stomatal conductance and a decrease in root hydraulic conductance. P and water display contrasting distributions in the soil, with P being concentrated in the topsoil and water in the subsoil. Plants adapt to water- and P-limited environments by efficiently exploring localized resource hotspots of P and water through the adaptation of their root system. Thus, developing cultivars with improved root architecture is crucial for accessing and utilizing P and water from arid and P-deficient soils. To meet this goal, breeding towards multiple advantageous root traits can lead to better cultivars for water- and P-limited environments. This review discusses the interplay of P and water availability and highlights specific root traits that enhance the exploration and exploitation of optimal resource-rich soil strata while reducing metabolic costs. We propose root ideotype models, including 'topsoil foraging', 'subsoil foraging', and 'topsoil/subsoil foraging' for maize (monocot) and common bean (dicot). These models integrate beneficial root traits and guide the development of water- and P-efficient cultivars for challenging environments.
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Affiliation(s)
- Maryam Nasr Esfahani
- Department of Biology, Chair of Biochemistry, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany.
| | - Uwe Sonnewald
- Department of Biology, Chair of Biochemistry, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany.
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17
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Cooksley H, Dreyling L, Esler KJ, Griebenow S, Neumann G, Valentine A, Schleuning M, Schurr FM. Functional traits shape plant-plant interactions and recruitment in a hotspot of woody plant diversity. THE NEW PHYTOLOGIST 2024; 241:1100-1114. [PMID: 38083904 DOI: 10.1111/nph.19453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 06/28/2023] [Indexed: 01/12/2024]
Abstract
Understanding and predicting recruitment in species-rich plant communities requires identifying functional determinants of both density-independent performance and interactions. In a common-garden field experiment with 25 species of the woody plant genus Protea, we varied the initial spatial and taxonomic arrangement of seedlings and followed their survival and growth during recruitment. Neighbourhood models quantified how six key functional traits affect density-independent performance, interaction effects and responses. Trait-based neighbourhood models accurately predicted individual survival and growth from the initial spatial and functional composition of species-rich experimental communities. Functional variation among species caused substantial variation in density-independent survival and growth that was not correlated with interaction effects and responses. Interactions were spatially restricted but had important, predominantly competitive, effects on recruitment. Traits increasing the acquisition of limiting resources (water for survival and soil P for growth) mediated trade-offs between interaction effects and responses. Moreover, resprouting species had higher survival but reduced growth, likely reinforcing the survival-growth trade-off in adult plants. Resource acquisition of juvenile plants shapes Protea community dynamics with acquisitive species with strong competitive effects suffering more from competition. Together with functional determinants of density-independent performance, this makes recruitment remarkably predictable, which is critical for efficient restoration and near-term ecological forecasts of species-rich communities.
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Affiliation(s)
- Huw Cooksley
- Institute of Landscape and Plant Ecology, University of Hohenheim, 70599, Stuttgart, Germany
- Department of Conservation Ecology and Entomology, Stellenbosch University, Stellenbosch, 7602, South Africa
| | - Lukas Dreyling
- Institute of Landscape and Plant Ecology, University of Hohenheim, 70599, Stuttgart, Germany
- Senckenberg Biodiversity and Climate Research Centre, 60325, Frankfurt am Main, Germany
| | - Karen J Esler
- Department of Conservation Ecology and Entomology, Stellenbosch University, Stellenbosch, 7602, South Africa
| | - Stian Griebenow
- Department of Botany and Zoology, Stellenbosch University, Stellenbosch, 7602, South Africa
| | - Günter Neumann
- Institute of Crop Science, University of Hohenheim, 70599, Stuttgart, Germany
| | - Alex Valentine
- Department of Horticulture, Stellenbosch University, Stellenbosch, 7602, South Africa
| | - Matthias Schleuning
- Senckenberg Biodiversity and Climate Research Centre, 60325, Frankfurt am Main, Germany
| | - Frank M Schurr
- Institute of Landscape and Plant Ecology, University of Hohenheim, 70599, Stuttgart, Germany
- KomBioTa - Center for Biodiversity and Integrative Taxonomy, University of Hohenheim & State Museum of Natural History, 70599, Stuttgart, Germany
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18
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Wang Y, Zhang C, Xiao X, Wu H, Zhang J. Water-use strategies and functional traits explain divergent linkages in physiological responses to simulated precipitation change. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 908:168238. [PMID: 37939960 DOI: 10.1016/j.scitotenv.2023.168238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 10/14/2023] [Accepted: 10/29/2023] [Indexed: 11/10/2023]
Abstract
As a part of global climate change, precipitation patterns in arid regions will change significantly, and the different responses of desert plants to these changes will lead to alterations in community composition, thereby impacting ecosystem stability. Thus, understanding the mechanism underlying the associations among physiological response variables considering changing precipitation is crucial. Here, water-use strategies, functional traits, and physiological processes (e.g., photosynthesis (An), transpiration (Tr), leaf water potential (Ψl), stomatal conductance (gs), and soil respiration (Rs)) were measured in a precipitation experiment with two coexisting desert riparian species to determine how water-use strategies and functional traits operate together in generating physiological response mechanisms. The results showed that the two species exhibited divergent response pathways of physiological processes following rainfall events, although both were identified as isohydric plants with stringent stomatal regulation. For the shallow-rooted species N. sphaerocarpa, gs was sensitive to changes in both surface soil moisture (Swc) and Ψl, and Swc was the primary factor influencing Rs. These results were supported by the preference for shallow water and predominance of functional traits associated with drought avoidance. For the deep-rooted species R. soongorica, variations in gs were decoupled from Swc and directly influenced by enhanced Ψl, An was the main factor affecting Rs, while Ψl negatively affected Rs. These correlations could be attributed to the preference for deep water and functional traits associated with drought tolerance. These findings suggest that R. soongorica had a stronger tolerance to environmental water deficits and may expand extensively under drier climatic conditions in the future.
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Affiliation(s)
- Yang Wang
- College of Life Science and Technology, Inner Mongolia Normal University, Hohhot 010022, China; Key Laboratory of Biodiversity conservation and Sustainable utilization in Mongolian Plateau for College and University of Inner Mongolia Autonomous Region, Hohhot 010022, China.; Key Laboratory of Infinite-dimensional Hamiltonian System and Its Algorithm Application, Inner Mongolia Normal University, Hohhot 010022, China..
| | - Cicheng Zhang
- College of Geographic Science, Hunan Normal University, Changsha, China.
| | - Xiong Xiao
- College of Geographic Science, Hunan Normal University, Changsha, China.
| | - Huawu Wu
- Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology Chinese Academy of Sciences, Nanjing 210008, China.
| | - Jinghui Zhang
- School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China.
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19
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Galindo-Castañeda T, Hartmann M, Lynch JP. Location: root architecture structures rhizosphere microbial associations. JOURNAL OF EXPERIMENTAL BOTANY 2024; 75:594-604. [PMID: 37882632 PMCID: PMC10773995 DOI: 10.1093/jxb/erad421] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Accepted: 10/25/2023] [Indexed: 10/27/2023]
Abstract
Root architectural phenotypes are promising targets for crop breeding, but root architectural effects on microbial associations in agricultural fields are not well understood. Architecture determines the location of microbial associations within root systems, which, when integrated with soil vertical gradients, determines the functions and the metabolic capability of rhizosphere microbial communities. We argue that variation in root architecture in crops has important implications for root exudation, microbial recruitment and function, and the decomposition and fate of root tissues and exudates. Recent research has shown that the root microbiome changes along root axes and among root classes, that root tips have a unique microbiome, and that root exudates change within the root system depending on soil physicochemical conditions. Although fresh exudates are produced in larger amounts in root tips, the rhizosphere of mature root segments also plays a role in influencing soil vertical gradients. We argue that more research is needed to understand specific root phenotypes that structure microbial associations and discuss candidate root phenotypes that may determine the location of microbial hotspots within root systems with relevance to agricultural systems.
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Affiliation(s)
| | - Martin Hartmann
- Department of Environmental Systems Service, ETH Zürich, 8092 Zurich, Switzerland
| | - Jonathan P Lynch
- Department of Plant Science, The Pennsylvania State University, University Park, PA 16802, USA
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20
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Guan ZH, Cao Z, Li XG, Scholten T, Kühn P, Wang L, Yu RP, He JS. Soil phosphorus availability mediates the effects of nitrogen addition on community- and species-level phosphorus-acquisition strategies in alpine grasslands. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 906:167630. [PMID: 37806588 DOI: 10.1016/j.scitotenv.2023.167630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 10/04/2023] [Accepted: 10/05/2023] [Indexed: 10/10/2023]
Abstract
Plants modulate their phosphorus (P) acquisition strategies (i.e., change in root morphology, exudate composition, and mycorrhizal symbiosis) to adapt to varying soil P availability. However, how community- and species-level P-acquisition strategies change in response to nitrogen (N) supply under different P levels remains unclear. To address this research gap, we conducted an 8-year fully factorial field experiment in an alpine grassland on the Qinghai-Tibet Plateau (QTP) combined with a 12-week glasshouse experiment with four treatments (N addition, P addition, combined N and P addition, and control). In the field experiment (community-level), when P availability was low, N addition increased the release of carboxylate from roots and led to a higher percentage of colonisation by arbuscular mycorrhizal fungi (AMF), along with decreased root length, specific root length (SRL), and total root length colonised by AMF. When P availability was higher, N addition resulted in an increase in the plant's demand for P, accompanied by an increase in root diameter and phosphatase activity. In the glasshouse experiment (species-level), the P-acquisition strategies of grasses and sedge in response to N addition alone mirrored those observed in the field, exhibiting a reduction in root length, SRL, and total root length colonised, but an increased percentage of AMF colonisation. Forbs responded to N addition alone with increased investment in all P-acquisition strategies, especially increased root biomass and length. P-acquisition strategies showed consistent changes among all species in response to combined N and P addition. Our results suggest that increased carboxylate release and AMF colonisation rate are common P-acquisition strategies of plants in alpine grasslands under N-induced P limitation. The main difference in P-acquisition strategies between forbs and grasses/sedges in response to N addition under low-P conditions was an increase in root biomass and length.
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Affiliation(s)
- Zhen-Huan Guan
- State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Zuonan Cao
- Department of Geosciences, Soil Science and Geomorphology, University of Tübingen, Tübingen 72070, Germany
| | - Xiao Gang Li
- College of Ecology, Lanzhou University, Lanzhou 730000, China
| | - Thomas Scholten
- Department of Geosciences, Soil Science and Geomorphology, University of Tübingen, Tübingen 72070, Germany
| | - Peter Kühn
- Department of Geosciences, Soil Science and Geomorphology, University of Tübingen, Tübingen 72070, Germany
| | - Lin Wang
- College of Ecology, Lanzhou University, Lanzhou 730000, China
| | - Rui-Peng Yu
- Beijing Key Laboratory of Biodiversity and Organic Farming, Key Laboratory of Plant-Soil Interactions, Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
| | - Jin-Sheng He
- State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730000, China; Institute of Ecology, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China.
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21
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Wang R, Funayama-Noguchi S, Xiong Z, Staudinger C, Wasaki J. Phosphorus absorption kinetics and exudation strategies of roots developed by three lupin species to tackle P deficiency. PLANTA 2023; 259:29. [PMID: 38133691 DOI: 10.1007/s00425-023-04307-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 12/01/2023] [Indexed: 12/23/2023]
Abstract
MAIN CONCLUSION Different lupin species exhibited varied biomass, P allocation, and physiological responses to P-deprivation. White and yellow lupins had higher carboxylate exudation rates, while blue lupin showed the highest phosphatase activity. White lupin (Lupinus albus) can produce specialized root structures, called cluster roots, which are adapted to low-phosphorus (P) soil. Blue lupin (L. angustifolius) and yellow lupin (L. luteus), which are two close relatives of white lupin, do not produce cluster roots. This study characterized plant responses to nutrient limitation by analyzing biomass accumulation and P distribution, absorption kinetics and root exudation in white, blue, and yellow lupins. Plants were grown in hydroponic culture with (64 µM NaH2PO4) or without P for 31 days. Under P limitation, more biomass was allocated to roots to improve P absorption. Furthermore, the relative growth rate of blue lupin showed the strongest inhibition. Under + P conditions, the plant total-P contents of blue lupin and yellow lupin were higher than that of white lupin. To elucidate the responses of lupins via the perspective of absorption kinetics and secretion analysis, blue and yellow lupins were confirmed to have stronger affinity and absorption capacity for orthophosphate after P-deprivation cultivation, whereas white lupin and yellow lupin had greater ability to secrete organic acids. The exudation of blue lupin had higher acid phosphatase activity. This study elucidated that blue lupin was more sensitive to P-scarcity stress and yellow had the greater tolerance of P-deficient condition than either of the other two lupin species. The three lupin species have evolved different adaptation strategies to cope with P deficiency.
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Affiliation(s)
- Ruixin Wang
- Graduate School of Integrated Sciences for Life, Hiroshima University, Kagamiyama 1-7-1, Higashi-Hiroshima, 739-8521, Japan
| | - Sachiko Funayama-Noguchi
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-Ku, Tokyo, 113-8657, Japan
| | - Zilin Xiong
- Graduate School of Integrated Sciences for Life, Hiroshima University, Kagamiyama 1-7-1, Higashi-Hiroshima, 739-8521, Japan
| | - Christiana Staudinger
- Graduate School of Integrated Sciences for Life, Hiroshima University, Kagamiyama 1-7-1, Higashi-Hiroshima, 739-8521, Japan
- Department of Crop Sciences, University of Natural Resources and Life Sciences (BOKU), Konrad Lorenz Str. 24, 3430, Tulln, Austria
| | - Jun Wasaki
- Graduate School of Integrated Sciences for Life, Hiroshima University, Kagamiyama 1-7-1, Higashi-Hiroshima, 739-8521, Japan.
- Seto Inland Sea Carbon Neutral Research Center, Hiroshima University, Higashi-Hiroshima, Japan.
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Zhang YW, Peng ZC, Chang SH, Wang ZF, Li DC, An YF, Hou FJ, Ren JZ. Long-term grazing improved soil chemical properties and benefited community traits under climatic influence in an alpine typical steppe. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 348:119184. [PMID: 37832291 DOI: 10.1016/j.jenvman.2023.119184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 09/24/2023] [Accepted: 09/28/2023] [Indexed: 10/15/2023]
Abstract
Grazing and climate change both contribute to diversity loss and productivity fluctuations. Sensitive climate conditions and long-term grazing activities have a profound influence on community change, particularly in high-altitude mountain grassland ecosystems. However, knowledge about the role of long-term continuous grazing management on diversity, productivity and the regulation mechanisms in fragile grassland ecosystems is still rudimentary. We conducted a long-term grazing experiment on an alpine typical steppe in the Qilian Mountains to assess effects of grazing intensity on soil, diversity, productivity and the regulation mechanisms. Plants and soil were sampled along grazing gradients at different distances from the pasture entrance (0, 0.3, 0.6, 0.9, 1.2 and 1.5 km) under the non-growing (WP) and the growing season grazing pasture (SAP). The results revealed that community diversity and biomass did not change significantly on a time scale, while the concentration of soil organic carbon and total phosphorus increased significantly. Heavy grazing (0-0.3 km) decreased community diversity and biomass. Grazing increased soil chemical properties in heavy grazed areas of WP, while the opposite was recorded in SAP. Soil chemical properties explained the largest variances in community diversity and community biomass. The prediction model indicates that grazing in WP mainly affects community diversity through soil chemical properties, and promotes a positive correlation between community diversity and community biomass; in SAP, the direct effect of grazing gradients on community diversity and biomass is the main pathway, but not eliminating the single positive relationship between diversity and biomass, which means that diversity can still be used as a potential resource to promote productivity improvement. Therefore, we should focus on the regulation of soil chemical properties in WP, such as the health and quality of soil, strengthening its ability to store water, sequester carbon and increase nutrients; focus on the management of livestock in SAP, including providing fertilizer and sowing to increase diversity and production in heavily grazed regions and reducing grazing pressure through regional rotational grazing. Ultimately, we call for strengthening the stability and sustainability of ecosystems through targeted and active human intervention in ecologically sensitive areas to cope with future grazing pressures and climate disturbances.
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Affiliation(s)
- Yu-Wen Zhang
- State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, Gansu, PR China
| | - Ze-Chen Peng
- State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, Gansu, PR China
| | - Sheng-Hua Chang
- State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, Gansu, PR China
| | - Zhao-Feng Wang
- State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, Gansu, PR China
| | - Duo-Cai Li
- Bureau of Quality and Technical Supervision Liangzhou Branch, Wuwei, Gansu, PR China
| | - Yu-Feng An
- Sunan Yugu Autonomous County Deer Farm, Zhangye, Gansu, PR China
| | - Fu-Jiang Hou
- State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, Gansu, PR China.
| | - Ji-Zhou Ren
- State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, Gansu, PR China
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23
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Hennecke J, Bassi L, Mommer L, Albracht C, Bergmann J, Eisenhauer N, Guerra CA, Heintz-Buschart A, Kuyper TW, Lange M, Solbach MD, Weigelt A. Responses of rhizosphere fungi to the root economics space in grassland monocultures of different age. THE NEW PHYTOLOGIST 2023; 240:2035-2049. [PMID: 37691273 DOI: 10.1111/nph.19261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Accepted: 08/21/2023] [Indexed: 09/12/2023]
Abstract
Recent studies on root traits have shown that there are two axes explaining trait variation belowground: the collaboration axis with mycorrhizal partners and the conservation ('fast - slow') axis. However, it is yet unknown whether these trait axes affect the assembly of soilborne fungi. We expect saprotrophic fungi to link to the conservation axis of root traits, whereas pathogenic and arbuscular mycorrhizal fungi link to the collaboration axis, but in opposite directions, as arbuscular mycorrhizal fungi might provide pathogen protection. To test these hypotheses, we sequenced rhizosphere fungal communities and measured root traits in monocultures of 25 grassland plant species, differing in age. Within the fungal guilds, we evaluated fungal species richness, relative abundance and community composition. Contrary to our hypotheses, fungal diversity and relative abundance were not strongly related to the root trait axes. However, saprotrophic fungal community composition was affected by the conservation gradient and pathogenic community composition by the collaboration gradient. The rhizosphere AMF community composition did not change along the collaboration gradient, even though the root trait axis was in line with the root mycorrhizal colonization rate. Overall, our results indicate that in the long term, the root trait axes are linked with fungal community composition.
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Affiliation(s)
- Justus Hennecke
- Systematic Botany and Functional Biodiversity, Institute of Biology, Leipzig University, 04103, Leipzig, Germany
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, 04103, Leipzig, Germany
| | - Leonardo Bassi
- Systematic Botany and Functional Biodiversity, Institute of Biology, Leipzig University, 04103, Leipzig, Germany
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, 04103, Leipzig, Germany
| | - Liesje Mommer
- Forest Ecology and Forest Management Group, Wageningen University, 6708 PB, Wageningen, the Netherlands
| | - Cynthia Albracht
- Department of Soil Ecology, Helmholtz Centre for Environmental Research - UFZ, 06120, Halle, Germany
- Biosystems Data Analysis, Swammerdam Institute for Life Sciences, University of Amsterdam, 1098 XH, Amsterdam, the Netherlands
| | - Joana Bergmann
- Sustainable Grassland Systems, Leibniz Centre for Agricultural Landscape Research (ZALF), 14641, Paulinenaue, Germany
| | - Nico Eisenhauer
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, 04103, Leipzig, Germany
- Institute of Biology, Leipzig University, 04103, Leipzig, Germany
| | - Carlos A Guerra
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, 04103, Leipzig, Germany
- Institute of Biology, Martin Luther University Halle-Wittenberg, 06108, Halle (Saale), Germany
| | - Anna Heintz-Buschart
- Biosystems Data Analysis, Swammerdam Institute for Life Sciences, University of Amsterdam, 1098 XH, Amsterdam, the Netherlands
| | - Thomas W Kuyper
- Soil Biology Group, Wageningen University, 6708 PB, Wageningen, the Netherlands
| | - Markus Lange
- Department of Biogeochemical Processes, Max Planck Institute for Biogeochemistry, 07745, Jena, Germany
| | - Marcel Dominik Solbach
- Terrestrial Ecology Group, Institute of Zoology, University of Cologne, 50674, Cologne, Germany
| | - Alexandra Weigelt
- Systematic Botany and Functional Biodiversity, Institute of Biology, Leipzig University, 04103, Leipzig, Germany
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, 04103, Leipzig, Germany
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24
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Liu Y, Cordero I, Bardgett RD. Defoliation and fertilisation differentially moderate root trait effects on soil abiotic and biotic properties. THE JOURNAL OF ECOLOGY 2023; 111:2733-2749. [PMID: 38516387 PMCID: PMC10952586 DOI: 10.1111/1365-2745.14215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 09/15/2023] [Indexed: 03/23/2024]
Abstract
Root functional traits are known to influence soil properties that underpin ecosystem functioning. Yet few studies have explored how root traits simultaneously influence physical, chemical, and biological properties of soil, or how these responses are modified by common grassland perturbations that shape roots, such as defoliation and fertilisation.Here, we explored how root traits of a wide range of grassland plant species with contrasting resource acquisition strategies (i.e. conservative vs. exploitative strategy plant species) respond to defoliation and fertilisation individually and in combination, and examined cascading impacts on a range of soil abiotic and biotic properties that underpin ecosystem functioning.We found that the amplitude of the response of root traits to defoliation and fertilisation varied among plant species, in most cases independently of plant resource acquisition strategies. However, the direction of the root trait responses (increase or decrease) to perturbations was consistent across all plant species, with defoliation and fertilisation exerting opposing effects on root traits. Specific root length increased relative to non-perturbed control in response to defoliation, while root biomass, root mass density, and root length density decreased. Fertilisation induced the opposite responses. We also found that both defoliation and fertilisation individually enhanced the role of root traits in regulating soil biotic and abiotic properties, especially soil aggregate stability. Synthesis: Our results indicate that defoliation and fertilisation, two common grassland perturbations, have contrasting impacts on root traits of grassland plant species, with direct and indirect short-term consequences for a wide range of soil abiotic and biotic properties that underpin ecosystem functioning.
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Affiliation(s)
- Yan Liu
- Department of Earth and Environmental SciencesThe University of ManchesterManchesterUK
| | - Irene Cordero
- Department of Earth and Environmental SciencesThe University of ManchesterManchesterUK
- Department of Community EcologySwiss Federal Institute for Forest, Snow and Landscape Research WSLBirmensdorfSwitzerland
| | - Richard D. Bardgett
- Department of Earth and Environmental SciencesThe University of ManchesterManchesterUK
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25
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Huang Z, He X, Zhang C, Zhang M, Wang J, Hou Y, Wang D, Yao S, Yu Q, Ji K. Microbial communities and functions changed in rhizosphere soil of Pinus massoniana provenances with different carbon storage. Front Microbiol 2023; 14:1264670. [PMID: 38029152 PMCID: PMC10655096 DOI: 10.3389/fmicb.2023.1264670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 10/17/2023] [Indexed: 12/01/2023] Open
Abstract
Introduction The average carbon storage of Pinus massoniana is much higher than the average carbon storage of Chinese forests, an important carbon sink tree species in subtropical regions of China. However, there are few studies on the differences in rhizosphere microorganisms of P. massoniana with different carbon storages. Methods To clarify the relationships between plant carbon storage level, environmental parameters and microbial community structure, we identified three carbon storage levels from different P. massoniana provenances and collected rhizosphere soil samples. We determined chemical properties of soil, extracellular enzyme activity, and microbial community structures at different carbon storage levels and examined how soil factors affect rhizosphere microorganisms under different carbon storage levels. Results The results revealed that soil organic carbon (SOC), nitrate nitrogen (NO3--N), ammonium nitrogen (NH4+-N) contents all increased with increasing carbon storage levels, while pH decreased accordingly. In contrast, the available phosphorus (AP) content did not change significantly. The soil AP content was within the range of 0.91 ~ 1.04 mg/kg. The microbial community structure of P. massoniana changed with different carbon storage, with Acidobacteria (44.27%), Proteobacteria (32.57%), and Actinobacteria (13.43%) being the dominant bacterial phyla and Basidiomycota (73.36%) and Ascomycota (24.64%) being the dominant fungal phyla across the three carbon storage levels. Soil fungi were more responsive to carbon storage than bacteria in P. massoniana. C/N, NH4+-N, NO3--N, and SOC were the main drivers (p < 0.05) of changes in rhizosphere microbial communities. Discussion The results revealed that in the rhizosphere there were significant differences in soil carbon cycle and microorganism nutrient preferences at different carbon storages of P. massoniana provenance, which were significantly related to the changes in rhizosphere microbial community structure. Jiangxi Anyuan (AY) provenance is more suitable for the construction of high carbon storage plantation.
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Affiliation(s)
- Zichen Huang
- State Key Laboratory of Tree Genetics and Breeding, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
| | - Xin He
- State Key Laboratory of Tree Genetics and Breeding, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
| | - Chi Zhang
- State Key Laboratory of Tree Genetics and Breeding, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
| | - Mengyang Zhang
- State Key Laboratory of Tree Genetics and Breeding, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
| | - Jiannan Wang
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Biology and the Environment, Nanjing Forestry University, Nanjing, China
| | - Yanqing Hou
- State Key Laboratory of Tree Genetics and Breeding, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
| | - Dengbao Wang
- State Key Laboratory of Tree Genetics and Breeding, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
| | - Sheng Yao
- State Key Laboratory of Tree Genetics and Breeding, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
| | - Qiong Yu
- State Key Laboratory of Tree Genetics and Breeding, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
| | - Kongshu Ji
- State Key Laboratory of Tree Genetics and Breeding, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
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26
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Zhang Y, Cao JJ, Yang QP, Wu MZ, Zhao Y, Kong DL. The worldwide allometric relationship in anatomical structures for plant roots. PLANT DIVERSITY 2023; 45:621-629. [PMID: 38197011 PMCID: PMC10772186 DOI: 10.1016/j.pld.2023.05.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 04/15/2023] [Accepted: 05/25/2023] [Indexed: 01/11/2024]
Abstract
The cortex (i.e., absorptive tissue) and stele (transportive vascular tissue) are fundamental to the function of plant roots. Unraveling how these anatomical structures are assembled in absorptive roots is essential for our understanding of plant ecology, physiology, and plant responses to global environmental changes. In this review, we first compile a large data set on anatomical traits in absorptive roots, including cortex thickness and stele radius, across 698 observations and 512 species. Using this data set, we reveal a common root allometry in absorptive root structures, i.e., cortex thickness increases much faster than stele radius with increasing root diameter (hereafter, root allometry). Root allometry is further validated within and across plant growth forms (woody, grass, and liana species), mycorrhiza types (arbuscular mycorrhiza, ectomycorrhiza, and orchid mycorrhizas), phylogenetic gradients (from ferns to Orchidaceae), and environmental change scenarios (e.g., elevation of atmospheric CO2 concentration and nitrogen fertilization). These findings indicate that root allometry is common in plants. Importantly, root allometry varies greatly across species. We then summarize recent research on the mechanisms of root allometry and potential issues regarding these mechanisms. We further discuss ecological and evolutionary implications of root allometry. Finally, we propose several important research directions that should be pursued regarding root allometry.
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Affiliation(s)
- Yue Zhang
- College of Forestry, Henan Agricultural University, Zhengzhou 450002, China
| | - Jing-Jing Cao
- College of Forestry, Henan Agricultural University, Zhengzhou 450002, China
| | - Qing-Pei Yang
- College of Forestry, Henan Agricultural University, Zhengzhou 450002, China
| | - Ming-Zuo Wu
- College of Forestry, Henan Agricultural University, Zhengzhou 450002, China
| | - Yong Zhao
- College of Forestry, Henan Agricultural University, Zhengzhou 450002, China
| | - De-Liang Kong
- College of Forestry, Henan Agricultural University, Zhengzhou 450002, China
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27
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Lailheugue V, Merlin I, Boutet S, Perreau F, Pouvreau JB, Delgrange S, Ducrot PH, Cottyn-Boitte B, Mouille G, Lauvergeat V. Vitislactone, a non-canonical strigolactone exudated by grapevine rootstocks in response to nitrogen starvation. PHYTOCHEMISTRY 2023; 215:113837. [PMID: 37640279 DOI: 10.1016/j.phytochem.2023.113837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 08/21/2023] [Accepted: 08/22/2023] [Indexed: 08/31/2023]
Abstract
Strigolactones are compounds produced by plant roots in response to nutrient deficiency, acting both as local and systemic signals to control development and nutrition. Strigolactones are exuded in the rhizosphere to positively influence interactions with beneficial microbes. LC-MS/MS analysis shows that two genetically distinct grapevine rootstocks exudate one or two non-canonical strigolactones when subjected to low nitrogen conditions. Gene expression profiles and orobanche seed germination assays confirm that the biosynthesis and exudation of non-canonical compounds is the preferred pathway. The first compound, corresponding to heliolactone or 6-epi-heliolactone, is only exuded by the rootstock showing lower shoot branching and a higher level of mycorrhization with arbuscular mycorrhizal fungi. The structure of the second compound exuded by both rootstocks was identified by NMR and LC-MS/MS analysis. It is a non-canonical strigolactone, which has never been identified in another species. This first identification of a natural compound with the potential to stimulate beneficial root-microbe interactions in grapevines opens new perspectives in viticulture.
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Affiliation(s)
- Vincent Lailheugue
- EGFV, Univ. Bordeaux, Bordeaux Sciences Agro, INRAE, ISVV, F-33882, Villenave d'Ornon, France.
| | - Isabelle Merlin
- EGFV, Univ. Bordeaux, Bordeaux Sciences Agro, INRAE, ISVV, F-33882, Villenave d'Ornon, France.
| | - Stéphanie Boutet
- Université Paris-Saclay, INRAE, AgroParisTech, Institut Jean-Pierre Bourgin (IJPB), 78000, Versailles, France.
| | - François Perreau
- Université Paris-Saclay, INRAE, AgroParisTech, Institut Jean-Pierre Bourgin (IJPB), 78000, Versailles, France.
| | | | - Sabine Delgrange
- Nantes Université, CNRS, US2B, UMR 6286, F-44000, Nantes, France.
| | - Paul-Henri Ducrot
- Université Paris-Saclay, INRAE, AgroParisTech, Institut Jean-Pierre Bourgin (IJPB), 78000, Versailles, France.
| | - Betty Cottyn-Boitte
- Université Paris-Saclay, INRAE, AgroParisTech, Institut Jean-Pierre Bourgin (IJPB), 78000, Versailles, France.
| | - Gregory Mouille
- Université Paris-Saclay, INRAE, AgroParisTech, Institut Jean-Pierre Bourgin (IJPB), 78000, Versailles, France.
| | - Virginie Lauvergeat
- EGFV, Univ. Bordeaux, Bordeaux Sciences Agro, INRAE, ISVV, F-33882, Villenave d'Ornon, France.
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28
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Delamare J, Brunel-Muguet S, Boukerb AM, Bressan M, Dumas L, Firmin S, Leroy F, Morvan-Bertrand A, Prigent-Combaret C, Personeni E. Impact of PGPR inoculation on root morphological traits and root exudation in rapeseed and camelina: interactions with heat stress. PHYSIOLOGIA PLANTARUM 2023; 175:e14058. [PMID: 38148195 DOI: 10.1111/ppl.14058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 10/09/2023] [Accepted: 10/11/2023] [Indexed: 12/28/2023]
Abstract
Root exudation is involved in the recruitment of beneficial microorganisms by trophic relationships and/or signalling pathways. Among beneficial microorganisms, Plant Growth-Promoting Rhizobacteria (PGPR) are known to improve plant growth and stress resistance. These interactions are of particular importance for species that do not interact with mycorrhizal fungi, such as rapeseed (Brassica napus L.) and camelina (Camelina sativa (L.) Crantz). However, heat stress is known to have a quantitative and qualitative impact on root exudation and could affect the interactions between plants and PGPR. We aimed to analyse the effects of PGPR inoculation on root morphology and exudation in rapeseed and camelina at the reproductive stage. The modulation of the effects of these interactions under heat stress was also investigated. The plants were inoculated twice at the reproductive stage with two different Pseudomonas species and were exposed to heat stress after the second inoculation. In non-stressing conditions, after bacterial inoculation, rapeseed and camelina exhibited two contrasting behaviours in C root allocation. While rapeseed plants seemed to suffer from the interactions with the bacteria, camelina plants appeared to control the relationship with the PGPR by modifying the composition of their root exudates. Under heat stress, the plant-PGPR interaction was unbalanced for rapeseed, for which the C allocation strategy is mainly driven by the C cost from the bacteria. Alternatively, camelina plants prioritized C allocation for their own above-ground development. This work opens up new perspectives for understanding plant-PGPR interactions, especially in an abiotic stress context.
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Affiliation(s)
- Jérémy Delamare
- UNICAEN, INRAE, UMR 950 Ecophysiologie Végétale, Agronomie et nutritions N, C, S, Esplanade de la Paix, CS14032, Normandie Université, Caen Cedex 5, France
| | - Sophie Brunel-Muguet
- UNICAEN, INRAE, UMR 950 Ecophysiologie Végétale, Agronomie et nutritions N, C, S, Esplanade de la Paix, CS14032, Normandie Université, Caen Cedex 5, France
| | - Amine M Boukerb
- CBSA UR4312, Univ Rouen Normandie, Unité de Recherche Communication Bactérienne et Stratégies Anti-infectieuses, Évreux, France
| | | | - Lucien Dumas
- UNICAEN, INRAE, UMR 950 Ecophysiologie Végétale, Agronomie et nutritions N, C, S, Esplanade de la Paix, CS14032, Normandie Université, Caen Cedex 5, France
| | | | | | - Annette Morvan-Bertrand
- UNICAEN, INRAE, UMR 950 Ecophysiologie Végétale, Agronomie et nutritions N, C, S, Esplanade de la Paix, CS14032, Normandie Université, Caen Cedex 5, France
| | - Claire Prigent-Combaret
- Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR5557 Ecologie Microbienne, 43 bd du 11 Novembre 1918, Université de Lyon, Villeurbanne, France
| | - Emmanuelle Personeni
- UNICAEN, INRAE, UMR 950 Ecophysiologie Végétale, Agronomie et nutritions N, C, S, Esplanade de la Paix, CS14032, Normandie Université, Caen Cedex 5, France
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Chen Z, Li H, Zhang WH, Wang B. The roles of stomatal morphologies in transpiration and nutrient transportation between grasses and forbs in a temperate steppe. ANNALS OF BOTANY 2023; 132:229-239. [PMID: 37470240 PMCID: PMC10583208 DOI: 10.1093/aob/mcad096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Accepted: 07/18/2023] [Indexed: 07/21/2023]
Abstract
BACKGROUND AND AIMS Grasses and forbs are dominant functional groups in temperate grasslands and display substantial differences in many biological traits, especially in root and stomatal morphologies, which are closely related to the use of water and nutrients. However, few studies have investigated the differences in nutrient accumulation and stomatal morphology-mediated transportation of water and nutrients from roots to shoots comparatively between the two functional groups. METHODS Here, we explored the patterns of accumulation of multiple nutrients (N, P, K, Ca, Mg and S) in leaves and roots, transpiration-related processes and interactions between nutrients and transpiration at functional group levels by experiments in a temperate steppe and collection of data from the literature. KEY RESULTS The concentrations of all the examined nutrients were obviously higher in both leaves and roots of forbs than those in grasses, especially for leaf Ca and Mg concentrations. Grasses with dumbbell-shaped stomata displayed significantly lower transpiration and stomatal conductance than forbs with kidney-shaped stomata. In contrast, grasses showed much higher water-use efficiency (WUE) than forbs. The contrasting patterns of nutrient accumulation, transpiration and WUE between grasses and forbs were less sensitive to varied environments. Leaf N, P and S concentrations were not affected by transpiration. In contrast, leaf Mg concentrations were positively correlated with transpiration in forb species. Furthermore, linear regression and principal component analysis showed that leaf Ca and Mg concentrations were positively correlated with transpiration between the two functional groups. CONCLUSIONS Our results revealed contrasting differences in acquisition of multiple nutrients and transpiration between grasses and forbs, and that stomatal morphologies are an important driver for the distinct WUE and translocation of Ca and Mg from roots to leaves between the two functional groups in temperate steppes. These findings will contribute to our understanding of the important roles of functional traits in driving water and nutrient cycling.
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Affiliation(s)
- Zhuo Chen
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, the Chinese Academy of Sciences, Beijing 100093, China
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hongbo Li
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Wen-hao Zhang
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, the Chinese Academy of Sciences, Beijing 100093, China
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Baolan Wang
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, the Chinese Academy of Sciences, Beijing 100093, China
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Zhang W, Gong J, Zhang Z, Song L, Lambers H, Zhang S, Dong J, Dong X, Hu Y. Soil phosphorus availability alters the correlations between root phosphorus-uptake rates and net photosynthesis of dominant C 3 and C 4 species in a typical temperate grassland of Northern China. THE NEW PHYTOLOGIST 2023; 240:157-172. [PMID: 37547950 DOI: 10.1111/nph.19167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Accepted: 06/30/2023] [Indexed: 08/08/2023]
Abstract
Phosphorus (P) fertilization can alleviate a soil P deficiency in grassland ecosystems. Understanding plant functional traits that enhance P uptake can improve grassland management. We measured impacts of P addition on soil chemical and microbial properties, net photosynthetic rate (Pn ) and nonstructural carbohydrate concentrations ([NSC]), and root P-uptake rate (PUR), morphology, anatomy, and exudation of two dominant grass species: Leymus chinensis (C3 ) and Cleistogenes squarrosa (C4 ). For L. chinensis, PUR and Pn showed a nonlinear correlation. Growing more adventitious roots compensated for the decrease in P transport per unit root length, so that it maintained a high PUR. For C. squarrosa, PUR and Pn presented a linear correlation. Increased Pn was associated with modifications in root morphology, which further enhanced its PUR and a greater surplus of photosynthate and significantly stimulated root exudation (proxied by leaf [Mn]), which had a greater impact on rhizosheath micro-environment and microbial PLFAs. Our results present correlations between the PUR and the Pn of L. chinensis and C. squarrosa and reveal that NSC appeared to drive the modifications of root morphology and exudation; they provide more objective basis for more efficient P-input in grasslands to address the urgent problem of P deficiency.
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Affiliation(s)
- Weiyuan Zhang
- State Key Laboratory of Earth Surface Processes and Resource Ecology, MOE Engineering Research Center of Desertification and Blown-Sand Control, Faculty of Geographical Science, Beijing Normal University, Beijing, 100875, China
| | - Jirui Gong
- State Key Laboratory of Earth Surface Processes and Resource Ecology, MOE Engineering Research Center of Desertification and Blown-Sand Control, Faculty of Geographical Science, Beijing Normal University, Beijing, 100875, China
| | - Zihe Zhang
- State Key Laboratory of Earth Surface Processes and Resource Ecology, MOE Engineering Research Center of Desertification and Blown-Sand Control, Faculty of Geographical Science, Beijing Normal University, Beijing, 100875, China
| | - Liangyuan Song
- State Key Laboratory of Earth Surface Processes and Resource Ecology, MOE Engineering Research Center of Desertification and Blown-Sand Control, Faculty of Geographical Science, Beijing Normal University, Beijing, 100875, China
| | - Hans Lambers
- School of Biological Sciences and Institute of Agriculture, University of Western Australia, Crawley, Perth, WA, 6009, Australia
| | - Siqi Zhang
- State Key Laboratory of Earth Surface Processes and Resource Ecology, MOE Engineering Research Center of Desertification and Blown-Sand Control, Faculty of Geographical Science, Beijing Normal University, Beijing, 100875, China
| | - Jiaojiao Dong
- State Key Laboratory of Earth Surface Processes and Resource Ecology, MOE Engineering Research Center of Desertification and Blown-Sand Control, Faculty of Geographical Science, Beijing Normal University, Beijing, 100875, China
| | - Xuede Dong
- State Key Laboratory of Earth Surface Processes and Resource Ecology, MOE Engineering Research Center of Desertification and Blown-Sand Control, Faculty of Geographical Science, Beijing Normal University, Beijing, 100875, China
| | - Yuxia Hu
- State Key Laboratory of Earth Surface Processes and Resource Ecology, MOE Engineering Research Center of Desertification and Blown-Sand Control, Faculty of Geographical Science, Beijing Normal University, Beijing, 100875, China
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Yang H, Zhang P, Wang Q, Deng S, He X, Zhang X, Wang R, Feng Q, Yin H. Temperature rather than N availability determines root exudation of alpine coniferous forests on the eastern Tibetan Plateau along elevation gradients. TREE PHYSIOLOGY 2023; 43:1479-1492. [PMID: 37209171 DOI: 10.1093/treephys/tpad067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 05/12/2023] [Accepted: 05/15/2023] [Indexed: 05/22/2023]
Abstract
Root exudation fulfills fundamental roles in regulating carbon (C)-nutrient cycling in forest ecosystems, yet the main ecological drivers of root exudation and underlying mechanisms in forests under natural gradients remain poorly understood. Here, we investigated the intraspecific variation of root exudation rates in two alpine coniferous forests (Abies faxoniana Rehder et Wilson and Abies georgei Orr) along two elevation gradients on the eastern Tibetan Plateau. Meanwhile, the fine root traits and associated climate and soil parameters were assessed to examine the effects of elevation-dependent changes in climatic and soil nutrient conditions on root exudation. Results showed that root exudation rates decreased with increasing elevation and were positively correlated with mean air temperature. However, the relationships of root exudation with soil moisture and soil nitrogen availability were not significant. The structural equation model (SEM) further revealed that air temperature affected root exudation both directly and indirectly through the effects on fine root morphology and biomass, implying that the adaption of root C allocation and fine root morphological traits to low temperatures primarily resulted in declined root exudation at higher elevations. These results highlight the perceived importance of temperature in determining the elevational variation of root exudation in alpine coniferous forests, which has foreseeably great implications for the exudate-mediated ecosystem C and nutrient processes in the face of drastic warming on the eastern Tibetan Plateau.
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Affiliation(s)
- Han Yang
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province & China-Croatia "Belt and Road" Joint Laboratory on Biodiversity and Ecosystem Services, Chengdu Institute of Biology, Chinese Academy of Sciences, No. 9 Section 4 South Renmin Road, Wuhou District, Chengdu, Sichuan 610041, China
- University of Chinese Academy of Sciences, No. 19A Yuquan Road, Shijingshan District, Beijing 100049, China
| | - Peipei Zhang
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province & China-Croatia "Belt and Road" Joint Laboratory on Biodiversity and Ecosystem Services, Chengdu Institute of Biology, Chinese Academy of Sciences, No. 9 Section 4 South Renmin Road, Wuhou District, Chengdu, Sichuan 610041, China
| | - Qitong Wang
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province & China-Croatia "Belt and Road" Joint Laboratory on Biodiversity and Ecosystem Services, Chengdu Institute of Biology, Chinese Academy of Sciences, No. 9 Section 4 South Renmin Road, Wuhou District, Chengdu, Sichuan 610041, China
| | - Shaojun Deng
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province & China-Croatia "Belt and Road" Joint Laboratory on Biodiversity and Ecosystem Services, Chengdu Institute of Biology, Chinese Academy of Sciences, No. 9 Section 4 South Renmin Road, Wuhou District, Chengdu, Sichuan 610041, China
- University of Chinese Academy of Sciences, No. 19A Yuquan Road, Shijingshan District, Beijing 100049, China
| | - Xi He
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province & China-Croatia "Belt and Road" Joint Laboratory on Biodiversity and Ecosystem Services, Chengdu Institute of Biology, Chinese Academy of Sciences, No. 9 Section 4 South Renmin Road, Wuhou District, Chengdu, Sichuan 610041, China
- University of Chinese Academy of Sciences, No. 19A Yuquan Road, Shijingshan District, Beijing 100049, China
| | - Xinjun Zhang
- Institute of Tibet Plateau Ecology & Key Laboratory of Forest Ecology in Tibet Plateau, Tibet Agriculture & Animal Husbandry University, No. 8 Xueyuan Road, Bayi District, Nyingchi, Tibet 860000, China
| | - Ruihong Wang
- Institute of Tibet Plateau Ecology & Key Laboratory of Forest Ecology in Tibet Plateau, Tibet Agriculture & Animal Husbandry University, No. 8 Xueyuan Road, Bayi District, Nyingchi, Tibet 860000, China
| | - Qiuhong Feng
- Sichuan Wolong Forest Ecosystem Research Station, Sichuan Academy of Forestry, No. 18 Xinghui West Road, Jinniu District, Chengdu, Sichuan 610081, China
| | - Huajun Yin
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province & China-Croatia "Belt and Road" Joint Laboratory on Biodiversity and Ecosystem Services, Chengdu Institute of Biology, Chinese Academy of Sciences, No. 9 Section 4 South Renmin Road, Wuhou District, Chengdu, Sichuan 610041, China
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Yu X, Tu Q, Liu J, Peng Y, Wang C, Xiao F, Lian Y, Yang X, Hu R, Yu H, Qian L, Wu D, He Z, Shu L, He Q, Tian Y, Wang F, Wang S, Wu B, Huang Z, He J, Yan Q, He Z. Environmental selection and evolutionary process jointly shape genomic and functional profiles of mangrove rhizosphere microbiomes. MLIFE 2023; 2:253-266. [PMID: 38817818 PMCID: PMC10989796 DOI: 10.1002/mlf2.12077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/22/2023] [Revised: 05/21/2023] [Accepted: 06/29/2023] [Indexed: 06/01/2024]
Abstract
Mangrove reforestation with introduced species has been an important strategy to restore mangrove ecosystem functioning. However, how such activities affect microbially driven methane (CH4), nitrogen (N), and sulfur (S) cycling of rhizosphere microbiomes remains unclear. To understand the effect of environmental selection and the evolutionary process on microbially driven biogeochemical cycles in native and introduced mangrove rhizospheres, we analyzed key genomic and functional profiles of rhizosphere microbiomes from native and introduced mangrove species by metagenome sequencing technologies. Compared with the native mangrove (Kandelia obovata, KO), the introduced mangrove (Sonneratia apetala, SA) rhizosphere microbiome had significantly (p < 0.05) higher average genome size (AGS) (5.8 vs. 5.5 Mb), average 16S ribosomal RNA gene copy number (3.5 vs. 3.1), relative abundances of mobile genetic elements, and functional diversity in terms of the Shannon index (7.88 vs. 7.84) but lower functional potentials involved in CH4 cycling (e.g., mcrABCDG and pmoABC), N2 fixation (nifHDK), and inorganic S cycling (dsrAB, dsrC, dsrMKJOP, soxB, sqr, and fccAB). Similar results were also observed from the recovered Proteobacterial metagenome-assembled genomes with a higher AGS and distinct functions in the introduced mangrove rhizosphere. Additionally, salinity and ammonium were identified as the main environmental drivers of functional profiles of mangrove rhizosphere microbiomes through deterministic processes. This study advances our understanding of microbially mediated biogeochemical cycling of CH4, N, and S in the mangrove rhizosphere and provides novel insights into the influence of environmental selection and evolutionary processes on ecosystem functions, which has important implications for future mangrove reforestation.
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Affiliation(s)
- Xiaoli Yu
- State Key Laboratory for Biocontrol, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Environmental Science and Engineering, Environmental Microbiomics Research CenterSun Yat‐sen UniversityGuangzhouChina
| | - Qichao Tu
- Institute of Marine Science and TechnologyShandong UniversityQingdaoChina
| | - Jihua Liu
- Institute of Marine Science and TechnologyShandong UniversityQingdaoChina
| | - Yisheng Peng
- State Key Laboratory for Biocontrol, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Environmental Science and Engineering, Environmental Microbiomics Research CenterSun Yat‐sen UniversityGuangzhouChina
| | - Cheng Wang
- State Key Laboratory for Biocontrol, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Environmental Science and Engineering, Environmental Microbiomics Research CenterSun Yat‐sen UniversityGuangzhouChina
| | - Fanshu Xiao
- State Key Laboratory for Biocontrol, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Environmental Science and Engineering, Environmental Microbiomics Research CenterSun Yat‐sen UniversityGuangzhouChina
| | - Yingli Lian
- State Key Laboratory for Biocontrol, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Environmental Science and Engineering, Environmental Microbiomics Research CenterSun Yat‐sen UniversityGuangzhouChina
| | - Xueqin Yang
- State Key Laboratory for Biocontrol, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Environmental Science and Engineering, Environmental Microbiomics Research CenterSun Yat‐sen UniversityGuangzhouChina
| | - Ruiwen Hu
- State Key Laboratory for Biocontrol, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Environmental Science and Engineering, Environmental Microbiomics Research CenterSun Yat‐sen UniversityGuangzhouChina
| | - Huang Yu
- State Key Laboratory for Biocontrol, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Environmental Science and Engineering, Environmental Microbiomics Research CenterSun Yat‐sen UniversityGuangzhouChina
| | - Lu Qian
- State Key Laboratory for Biocontrol, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Environmental Science and Engineering, Environmental Microbiomics Research CenterSun Yat‐sen UniversityGuangzhouChina
| | - Daoming Wu
- College of Forestry & Landscape ArchitectureSouth China Agricultural UniversityGuangzhouChina
| | - Ziying He
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Marine ScienceSun Yat‐sen UniversityGuangzhouChina
| | - Longfei Shu
- State Key Laboratory for Biocontrol, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Environmental Science and Engineering, Environmental Microbiomics Research CenterSun Yat‐sen UniversityGuangzhouChina
| | - Qiang He
- Department of Civil and Environmental EngineeringThe University of TennesseeKnoxvilleTennesseeUSA
| | - Yun Tian
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, School of Life SciencesXiamen UniversityXiamenChina
| | - Faming Wang
- Xiaoliang Research Station for Tropical Coastal Ecosystems and Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical GardenChinese Academy of SciencesGuangzhouChina
| | - Shanquan Wang
- State Key Laboratory for Biocontrol, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Environmental Science and Engineering, Environmental Microbiomics Research CenterSun Yat‐sen UniversityGuangzhouChina
| | - Bo Wu
- State Key Laboratory for Biocontrol, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Environmental Science and Engineering, Environmental Microbiomics Research CenterSun Yat‐sen UniversityGuangzhouChina
| | - Zhijian Huang
- State Key Laboratory for Biocontrol, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Environmental Science and Engineering, Environmental Microbiomics Research CenterSun Yat‐sen UniversityGuangzhouChina
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Marine ScienceSun Yat‐sen UniversityGuangzhouChina
| | - Jianguo He
- State Key Laboratory for Biocontrol, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Environmental Science and Engineering, Environmental Microbiomics Research CenterSun Yat‐sen UniversityGuangzhouChina
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Marine ScienceSun Yat‐sen UniversityGuangzhouChina
- School of Life SciencesSun Yat‐sen UniversityGuangzhouChina
| | - Qingyun Yan
- State Key Laboratory for Biocontrol, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Environmental Science and Engineering, Environmental Microbiomics Research CenterSun Yat‐sen UniversityGuangzhouChina
| | - Zhili He
- State Key Laboratory for Biocontrol, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Environmental Science and Engineering, Environmental Microbiomics Research CenterSun Yat‐sen UniversityGuangzhouChina
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Birkeli K, Gya R, Haugum SV, Velle LG, Vandvik V. Germination and seedling growth of Calluna vulgaris is sensitive to regional climate, heathland succession, and drought. Ecol Evol 2023; 13:e10199. [PMID: 37408632 PMCID: PMC10318425 DOI: 10.1002/ece3.10199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 05/22/2023] [Accepted: 06/01/2023] [Indexed: 07/07/2023] Open
Abstract
The coastal heathlands of Northwest Europe are highly valued cultural landscapes, that are critically endangered due to land use and climatic changes, such as increased frequency and severity of drought events. Our study is the first to assess how the germination and early seedling growth of Calluna vulgaris respond to drought. In a factorial design field experiment, we exposed maternal plants to three in-situ drought treatments (control, 60%, 90% roof coverage), across three successional stages after fire (pioneer, building, mature), and two regions (60°N, 65°N). Seeds from 540 plants within the experiment were, weighed, and exposed to five water potentials, ranging from -0.25 to -1.7 MPa, in a growth chamber experiment. We recorded germination (percentage, rate), seedling growth (above- vs. belowground allocation), and seedling functional traits (specific leaf area [SLA], specific root length [SRL]). Overall variation in germination between regions, successional stages, and maternal drought treatments was largely mediated by variation in seed mass. Plants from the northernmost region had higher seed mass and germination percentages. This is indicative of higher investment in seeds, likely linked to the populations' absence of vegetative root sprouting. Seeds from the mature successional stage germinated to lower final percentages than those from earlier successional stages, especially when the maternal plants had been exposed to drought (60% and 90% roof coverage). Exposure to reduced water availability decreased germination percentage and increased the time to 50% germination. Seedlings fully developed in the range -0.25 to -0.7 MPa, with increased root:shoot and lower SRL during reduced water availability, suggesting a resource-conservative response to drought during the early stages of development. Our results thus suggest a sensitivity to drought during the germination and seedling life-history stages that may reduce Calluna's ability to re-establish from seeds as the incidence and severity of droughts are projected to increase under future climates.
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Affiliation(s)
- Kristine Birkeli
- Department of Biological SciencesUniversity of BergenBergenNorway
- Bjerknes Center for Climate ResearchBergenNorway
| | - Ragnhild Gya
- Department of Biological SciencesUniversity of BergenBergenNorway
- Bjerknes Center for Climate ResearchBergenNorway
| | - Siri Vatsø Haugum
- Department of Biological SciencesUniversity of BergenBergenNorway
- Bjerknes Center for Climate ResearchBergenNorway
- The Heathland CentreAlverNorway
| | | | - Vigdis Vandvik
- Department of Biological SciencesUniversity of BergenBergenNorway
- Bjerknes Center for Climate ResearchBergenNorway
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Yedra VÁ, Otero P, Prieto MA, Simal-Gandara J, Reigosa MJ, Sánchez-Moreiras AM, Hussain MI. Testing the role of allelochemicals in different wheat cultivars to sustainably manage weeds. PEST MANAGEMENT SCIENCE 2023; 79:2625-2638. [PMID: 36890109 DOI: 10.1002/ps.7444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 02/10/2023] [Accepted: 03/08/2023] [Indexed: 06/02/2023]
Abstract
BACKGROUND Selecting wheat varieties with allelopathic potential or high competitiveness against weeds is a sustainable solution for organic farming to eliminate the use of synthetic herbicides. Wheat is one of the most economically important crops. This study focuses on screening the allelopathic or competitive potential of four wheat cultivars, Maurizio, NS 40S, Adesso and Element, on two weeds of interest due to acquired herbicide resistance, Portulaca oleracea and Lolium rigidum, through germination and growth bioassays and the identification and quantification of benzoxazinoids (BXZs) and polyphenols (phenolic acids and flavonoids). RESULTS The different cultivars showed different abilities to manage surrounding weeds and different capacity to exude or accumulate specialized metabolites in the presence of those weeds. Furthermore, each cultivar behaved differently depending on the weed present in the medium. The most efficient cultivar to control the tested monocot and dicot weeds was Maurizio, as it effectively controlled germination and growth of L. rigidum and P. oleracea while exuding large amounts of benzoxazinones through the roots, especially the hydroxamic acids 2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one and dihydroxy-2H-1,4-benzoxaxin-3(4H)-one. By contrast, NS 40S, Adesso and Element showed the potential to control the growth of just one of the two weeds through allelopathy or competition. CONCLUSION This study reveals that Maurizio is the most promising wheat cultivar for sustainable weed control, and that the screening of crop varieties with allelopathic potential, which results in the displacement of synthetic herbicides, is an immediate solution in ecological and sustainable agriculture. © 2023 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
- Vieites-Álvarez Yedra
- Universidade de Vigo, Departamento de Bioloxía Vexetal e Ciencia do Solo, Facultade de Bioloxía, Vigo, Spain
| | - Paz Otero
- Nutrition and Bromatology Group, Department of Analytical and Food Chemistry, Faculty of Food Science and Technology, Universidade de Vigo-Ourense Campus, Ourense, Spain
| | - Miguel Angel Prieto
- Nutrition and Bromatology Group, Department of Analytical and Food Chemistry, Faculty of Food Science and Technology, Universidade de Vigo-Ourense Campus, Ourense, Spain
| | - Jesus Simal-Gandara
- Nutrition and Bromatology Group, Department of Analytical and Food Chemistry, Faculty of Food Science and Technology, Universidade de Vigo-Ourense Campus, Ourense, Spain
| | - Manuel J Reigosa
- Universidade de Vigo, Departamento de Bioloxía Vexetal e Ciencia do Solo, Facultade de Bioloxía, Vigo, Spain
| | - Adela M Sánchez-Moreiras
- Universidade de Vigo, Departamento de Bioloxía Vexetal e Ciencia do Solo, Facultade de Bioloxía, Vigo, Spain
| | - M Iftikhar Hussain
- Universidade de Vigo, Departamento de Bioloxía Vexetal e Ciencia do Solo, Facultade de Bioloxía, Vigo, Spain
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Vieites-Álvarez Y, Otero P, López-González D, Prieto MA, Simal-Gandara J, Reigosa MJ, Hussain MI, Sánchez-Moreiras AM. Specialized Metabolites Accumulation Pattern in Buckwheat Is Strongly Influenced by Accession Choice and Co-Existing Weeds. PLANTS (BASEL, SWITZERLAND) 2023; 12:2401. [PMID: 37446961 DOI: 10.3390/plants12132401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 05/17/2023] [Accepted: 06/15/2023] [Indexed: 07/15/2023]
Abstract
Screening suitable allelopathic crops and crop genotypes that are competitive with weeds can be a sustainable weed control strategy to reduce the massive use of herbicides. In this study, three accessions of common buckwheat Fagopyrum esculentum Moench. (Gema, Kora, and Eva) and one of Tartary buckwheat Fagopyrum tataricum Gaertn. (PI481671) were screened against the germination and growth of the herbicide-resistant weeds Lolium rigidum Gaud. and Portulaca oleracea L. The chemical profile of the four buckwheat accessions was characterised in their shoots, roots, and root exudates in order to know more about their ability to sustainably manage weeds and the relation of this ability with the polyphenol accumulation and exudation from buckwheat plants. Our results show that different buckwheat genotypes may have different capacities to produce and exude several types of specialized metabolites, which lead to a wide range of allelopathic and defence functions in the agroecosystem to sustainably manage the growing weeds in their vicinity. The ability of the different buckwheat accessions to suppress weeds was accession-dependent without differences between species, as the common (Eva, Gema, and Kora) and Tartary (PI481671) accessions did not show any species-dependent pattern in their ability to control the germination and growth of the target weeds. Finally, Gema appeared to be the most promising accession to be evaluated in organic farming due to its capacity to sustainably control target weeds while stimulating the root growth of buckwheat plants.
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Affiliation(s)
- Yedra Vieites-Álvarez
- Departamento de Bioloxía Vexetal e Ciencia do Solo, Facultade de Bioloxía, Campus Lagoas-Marcosende s/n, Universidade de Vigo, 36310 Vigo, Spain
| | - Paz Otero
- Nutrition and Bromatology Group, Department of Analytical and Food Chemistry, Faculty of Food Science and Technology, Universidade de Vigo, Ourense Campus, 32004 Ourense, Spain
| | - David López-González
- Departamento de Bioloxía Vexetal e Ciencia do Solo, Facultade de Bioloxía, Campus Lagoas-Marcosende s/n, Universidade de Vigo, 36310 Vigo, Spain
| | - Miguel Angel Prieto
- Nutrition and Bromatology Group, Department of Analytical and Food Chemistry, Faculty of Food Science and Technology, Universidade de Vigo, Ourense Campus, 32004 Ourense, Spain
| | - Jesus Simal-Gandara
- Nutrition and Bromatology Group, Department of Analytical and Food Chemistry, Faculty of Food Science and Technology, Universidade de Vigo, Ourense Campus, 32004 Ourense, Spain
- Instituto de Agroecoloxía e Alimentación (IAA), Universidade de Vigo, Campus Auga, 32004 Ourense, Spain
| | - Manuel J Reigosa
- Departamento de Bioloxía Vexetal e Ciencia do Solo, Facultade de Bioloxía, Campus Lagoas-Marcosende s/n, Universidade de Vigo, 36310 Vigo, Spain
- Instituto de Agroecoloxía e Alimentación (IAA), Universidade de Vigo, Campus Auga, 32004 Ourense, Spain
| | - M Iftikhar Hussain
- Departamento de Bioloxía Vexetal e Ciencia do Solo, Facultade de Bioloxía, Campus Lagoas-Marcosende s/n, Universidade de Vigo, 36310 Vigo, Spain
| | - Adela M Sánchez-Moreiras
- Departamento de Bioloxía Vexetal e Ciencia do Solo, Facultade de Bioloxía, Campus Lagoas-Marcosende s/n, Universidade de Vigo, 36310 Vigo, Spain
- Instituto de Agroecoloxía e Alimentación (IAA), Universidade de Vigo, Campus Auga, 32004 Ourense, Spain
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Che J, Wu Y, Yang H, Wang S, Wu W, Lyu L, Wang X, Li W. Root Niches of Blueberry Imprint Increasing Bacterial-Fungal Interkingdom Interactions along the Soil-Rhizosphere-Root Continuum. Microbiol Spectr 2023; 11:e0533322. [PMID: 37222589 PMCID: PMC10269492 DOI: 10.1128/spectrum.05333-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Accepted: 05/10/2023] [Indexed: 05/25/2023] Open
Abstract
Plant root-associated microbiomes play critical roles in promoting plant health, productivity, and tolerance to biotic/abiotic stresses. Blueberry (Vaccinium spp.) is adapted to acidic soils, while the interactions of the root-associated microbiomes in this specific habitat under various root microenvironments remain elusive. Here, we investigated the diversity and community composition of bacterial and fungal communities in various blueberry root niches (bulk soil, rhizosphere soil, and root endosphere). The results showed that blueberry root niches significantly affected root-associated microbiome diversity and community composition compared to those of the three host cultivars. Deterministic processes gradually increased along the soil-rhizosphere-root continuum in both bacterial and fungal communities. The co-occurrence network topological features showed that both bacterial and fungal community complexity and intensive interactions decreased along the soil-rhizosphere-root continuum. Different compartment niches clearly influenced bacterial-fungal interkingdom interactions, which were significantly higher in the rhizosphere, and positive interactions gradually dominated the co-occurrence networks from the bulk soil to the endosphere. The functional predictions showed that rhizosphere bacterial and fungal communities may have higher cellulolysis and saprotrophy capacities, respectively. Collectively, the root niches not only affected microbial diversity and community composition but also enhanced the positive interkingdom interactions between bacterial and fungal communities along the soil-rhizosphere-root continuum. This provides an essential basis for manipulating synthetic microbial communities for sustainable agriculture. IMPORTANCE The blueberry root-associated microbiome plays an essential role in its adaptation to acidic soils and in limiting the uptake of soil nutrients by its poor root system. Studies on the interactions of the root-associated microbiome in the various root niches may deepen our understanding of the beneficial effects in this particular habitat. Our study extended the research on the diversity and composition of microbial communities in different blueberry root compartment niches. Root niches dominated the root-associated microbiome compared to that of the host cultivar, and deterministic processes increased from the bulk soil to the endosphere. In addition, bacterial-fungal interkingdom interactions were significantly higher in the rhizosphere, and those positive interactions progressively dominated the co-occurrence network along the soil-rhizosphere-root continuum. Collectively, root niches dominantly affected the root-associated microbiome and the positive interkingdom interactions increased, potentially providing benefits for the blueberry.
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Affiliation(s)
- Jilu Che
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
| | - Yaqiong Wu
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Nanjing, China
| | - Hao Yang
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
| | - Shaoyi Wang
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
| | - Wenlong Wu
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Nanjing, China
| | - Lianfei Lyu
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Nanjing, China
| | - Xiaomin Wang
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Nanjing, China
| | - Weilin Li
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
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Morales-Manzo II, Ribes-Moya AM, Pallotti C, Jimenez-Belenguer A, Moro CP, Raigón MD, Rodríguez-Burruezo A, Fita A. Root-Soil Interactions for Pepper Accessions Grown under Organic and Conventional Farming. PLANTS (BASEL, SWITZERLAND) 2023; 12:plants12091873. [PMID: 37176931 PMCID: PMC10180822 DOI: 10.3390/plants12091873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 04/12/2023] [Accepted: 04/28/2023] [Indexed: 05/15/2023]
Abstract
Modern agriculture has boosted the production of food based on the use of pesticides and fertilizers and improved plant varieties. However, the impact of some such technologies is high and not sustainable in the long term. Although the importance of rhizospheres in final plant performance, nutrient cycling, and ecosystems is well recognized, there is still a lack of information on the interactions of their main players. In this paper, four accessions of pepper are studied at the rhizosphere and root level under two farming systems: organic and conventional. Variations in soil traits, such as induced respiration, enzymatic activities, microbial counts, and metabolism of nitrogen at the rhizosphere and bulk soil, as well as measures of root morphology and plant production, are presented. The results showed differences for the evaluated traits between organic and conventional management, both at the rhizosphere and bulk soil levels. Organic farming showed higher microbial counts, enzymatic activities, and nitrogen mobilization. Our results also showed how some genotypes, such as Serrano or Piquillo, modified the properties of the rhizospheres in a very genotype-dependent way. This specificity of the soil-plant interaction should be considered for future breeding programs for soil-tailored agriculture.
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Affiliation(s)
- Ivan I Morales-Manzo
- Instituto de Conservación y Mejora de la Agrodiversidad Valenciana, Edificio 8E Escalera J, CPI, Universitat Politècnica de València, 46022 Valencia, Spain
| | - Ana M Ribes-Moya
- Instituto de Conservación y Mejora de la Agrodiversidad Valenciana, Edificio 8E Escalera J, CPI, Universitat Politècnica de València, 46022 Valencia, Spain
| | - Claudia Pallotti
- Instituto de Conservación y Mejora de la Agrodiversidad Valenciana, Edificio 8E Escalera J, CPI, Universitat Politècnica de València, 46022 Valencia, Spain
| | - Ana Jimenez-Belenguer
- Centro Avanzado de Microbiología Aplicada, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
| | - Clara Pérez Moro
- Instituto de Conservación y Mejora de la Agrodiversidad Valenciana, Edificio 8E Escalera J, CPI, Universitat Politècnica de València, 46022 Valencia, Spain
| | - María Dolores Raigón
- Instituto de Conservación y Mejora de la Agrodiversidad Valenciana, Edificio 8E Escalera J, CPI, Universitat Politècnica de València, 46022 Valencia, Spain
| | - Adrián Rodríguez-Burruezo
- Instituto de Conservación y Mejora de la Agrodiversidad Valenciana, Edificio 8E Escalera J, CPI, Universitat Politècnica de València, 46022 Valencia, Spain
| | - Ana Fita
- Instituto de Conservación y Mejora de la Agrodiversidad Valenciana, Edificio 8E Escalera J, CPI, Universitat Politècnica de València, 46022 Valencia, Spain
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Wu Y, Zhao C, Zhao X, Yang L, Liu C, Jiang L, Liu G, Liu P, Luo L. Multi-omics-based identification of purple acid phosphatases and metabolites involved in phosphorus recycling in stylo root exudates. Int J Biol Macromol 2023; 241:124569. [PMID: 37100319 DOI: 10.1016/j.ijbiomac.2023.124569] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 04/01/2023] [Accepted: 04/12/2023] [Indexed: 04/28/2023]
Abstract
Stylo (Stylosanthes guianensis) is a tropical forage and cover crop that possesses low phosphate (Pi) tolerance traits. However, the mechanisms underlying its tolerance to low-Pi stress, particularly the role of root exudates, remain unclear. This study employed an integrated approach using physiological, biochemical, multi-omics, and gene function analyses to investigate the role of stylo root exudates in response to low-Pi stress. Widely targeted metabolomic analysis revealed that eight organic acids and one amino acid (L-cysteine) were significantly increased in the root exudates of Pi-deficient seedlings, among which tartaric acid and L-cysteine had strong abilities to dissolve insoluble-P. Furthermore, flavonoid-targeted metabolomic analysis identified 18 flavonoids that were significantly increased in root exudates under low-Pi conditions, mainly belonging to the isoflavonoid and flavanone subclasses. Additionally, transcriptomic analysis revealed that 15 genes encoding purple acid phosphatases (PAPs) had upregulated expression in roots under low-Pi conditions. Among them, SgPAP10 was characterized as a root-secreted phosphatase, and overexpression of SgPAP10 enhanced organic-P utilization by transgenic Arabidopsis. Overall, these findings provide detailed information regarding the importance of stylo root exudates in adaptation to low-Pi stress, highlighting the plant's ability to release Pi from organic-P and insoluble-P sources through root-secreted organic acids, amino acids, flavonoids, and PAPs.
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Affiliation(s)
- Yuanhang Wu
- College of Tropical Crops, Hainan University, Haikou 570228, China; Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; Sanya Nanfan Research Institute of Hainan University, Sanya 572025, China
| | - Cang Zhao
- College of Tropical Crops, Hainan University, Haikou 570228, China; Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; Sanya Nanfan Research Institute of Hainan University, Sanya 572025, China
| | - Xingkun Zhao
- College of Tropical Crops, Hainan University, Haikou 570228, China; Sanya Nanfan Research Institute of Hainan University, Sanya 572025, China
| | - Liyun Yang
- College of Tropical Crops, Hainan University, Haikou 570228, China; Sanya Nanfan Research Institute of Hainan University, Sanya 572025, China
| | - Chun Liu
- College of Tropical Crops, Hainan University, Haikou 570228, China; Sanya Nanfan Research Institute of Hainan University, Sanya 572025, China
| | - Lingyan Jiang
- College of Tropical Crops, Hainan University, Haikou 570228, China; Sanya Nanfan Research Institute of Hainan University, Sanya 572025, China
| | - Guodao Liu
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
| | - Pandao Liu
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China.
| | - Lijuan Luo
- College of Tropical Crops, Hainan University, Haikou 570228, China; Sanya Nanfan Research Institute of Hainan University, Sanya 572025, China.
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Yue H, Yue W, Jiao S, Kim H, Lee YH, Wei G, Song W, Shu D. Plant domestication shapes rhizosphere microbiome assembly and metabolic functions. MICROBIOME 2023; 11:70. [PMID: 37004105 PMCID: PMC10064753 DOI: 10.1186/s40168-023-01513-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Accepted: 03/07/2023] [Indexed: 05/23/2023]
Abstract
BACKGROUND The rhizosphere microbiome, which is shaped by host genotypes, root exudates, and plant domestication, is crucial for sustaining agricultural plant growth. Despite its importance, how plant domestication builds up specific rhizosphere microbiomes and metabolic functions, as well as the importance of these affected rhizobiomes and relevant root exudates in maintaining plant growth, is not well understood. Here, we firstly investigated the rhizosphere bacterial and fungal communities of domestication and wild accessions of tetraploid wheat using amplicon sequencing (16S and ITS) after 9 years of domestication process at the main production sites in China. We then explored the ecological roles of root exudation in shaping rhizosphere microbiome functions by integrating metagenomics and metabolic genomics approaches. Furthermore, we established evident linkages between root morphology traits and keystone taxa based on microbial culture and plant inoculation experiments. RESULTS Our results suggested that plant rhizosphere microbiomes were co-shaped by both host genotypes and domestication status. The wheat genomes contributed more variation in the microbial diversity and composition of rhizosphere bacterial communities than fungal communities, whereas plant domestication status exerted much stronger influences on the fungal communities. In terms of microbial interkingdom association networks, domestication destabilized microbial network and depleted the abundance of keystone fungal taxa. Moreover, we found that domestication shifted the rhizosphere microbiome from slow growing and fungi dominated to fast growing and bacteria dominated, thereby resulting in a shift from fungi-dominated membership with enrichment of carbon fixation genes to bacteria-dominated membership with enrichment of carbon degradation genes. Metagenomics analyses further indicated that wild cultivars of wheat possess higher microbial function diversity than domesticated cultivars. Notably, we found that wild cultivar is able to harness rhizosphere microorganism carrying N transformation (i.e., nitrification, denitrification) and P mineralization pathway, whereas rhizobiomes carrying inorganic N fixation, organic N ammonification, and inorganic P solubilization genes are recruited by the releasing of root exudates from domesticated wheat. More importantly, our metabolite-wide association study indicated that the contrasting functional roles of root exudates and the harnessed keystone microbial taxa with different nutrient acquisition strategies jointly determined the aboveground plant phenotypes. Furthermore, we observed that although domesticated and wild wheats recruited distinct microbial taxa and relevant functions, domestication-induced recruitment of keystone taxa led to a consistent growth regulation of root regardless of wheat domestication status. CONCLUSIONS Our results indicate that plant domestication profoundly influences rhizosphere microbiome assembly and metabolic functions and provide evidence that host plants are able to harness a differentiated ecological role of root-associated keystone microbiomes through the release of root exudates to sustain belowground multi-nutrient cycles and plant growth. These findings provide valuable insights into the mechanisms underlying plant-microbiome interactions and how to harness the rhizosphere microbiome for crop improvement in sustainable agriculture. Video Abstract.
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Affiliation(s)
- Hong Yue
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Agronomy, Northwest A&F University, Yangling, Xianyang, 712100, Shaanxi, China
| | - Wenjie Yue
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Agronomy, Northwest A&F University, Yangling, Xianyang, 712100, Shaanxi, China
| | - Shuo Jiao
- Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, Yangling, Xianyang, 712100, Shaanxi, China
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling, Xianyang, 712100, Shaanxi, China
| | - Hyun Kim
- Department of Agricultural Biotechnology, Seoul National University, Seoul, 08826, Korea
| | - Yong-Hwan Lee
- Department of Agricultural Biotechnology, Seoul National University, Seoul, 08826, Korea
| | - Gehong Wei
- Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, Yangling, Xianyang, 712100, Shaanxi, China.
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling, Xianyang, 712100, Shaanxi, China.
| | - Weining Song
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Agronomy, Northwest A&F University, Yangling, Xianyang, 712100, Shaanxi, China.
| | - Duntao Shu
- Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, Yangling, Xianyang, 712100, Shaanxi, China.
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling, Xianyang, 712100, Shaanxi, China.
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Rutten G, Allan E. Using root economics traits to predict biotic plant soil-feedbacks. PLANT AND SOIL 2023; 485:71-89. [PMID: 37181279 PMCID: PMC10167139 DOI: 10.1007/s11104-023-05948-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 02/13/2023] [Indexed: 05/16/2023]
Abstract
Plant-soil feedbacks have been recognised as playing a key role in a range of ecological processes, including succession, invasion, species coexistence and population dynamics. However, there is substantial variation between species in the strength of plant-soil feedbacks and predicting this variation remains challenging. Here, we propose an original concept to predict the outcome of plant-soil feedbacks. We hypothesize that plants with different combinations of root traits culture different proportions of pathogens and mutualists in their soils and that this contributes to differences in performance between home soils (cultured by conspecifics) versus away soils (cultured by heterospecifics). We use the recently described root economics space, which identifies two gradients in root traits. A conservation gradient distinguishes fast vs. slow species, and from growth defence theory we predict that these species culture different amounts of pathogens in their soils. A collaboration gradient distinguishes species that associate with mycorrhizae to outsource soil nutrient acquisition vs. those which use a "do it yourself" strategy and capture nutrients without relying strongly on mycorrhizae. We provide a framework, which predicts that the strength and direction of the biotic feedback between a pair of species is determined by the dissimilarity between them along each axis of the root economics space. We then use data from two case studies to show how to apply the framework, by analysing the response of plant-soil feedbacks to measures of distance and position along each axis and find some support for our predictions. Finally, we highlight further areas where our framework could be developed and propose study designs that would help to fill current research gaps. Supplementary Information The online version contains supplementary material available at 10.1007/s11104-023-05948-1.
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Affiliation(s)
- Gemma Rutten
- Institute of Plant Sciences and Oeschger Centre for Climate Change Research, University of Bern, Altenbergrain 21, 3013 Bern, Switzerland
| | - Eric Allan
- Institute of Plant Sciences and Oeschger Centre for Climate Change Research, University of Bern, Altenbergrain 21, 3013 Bern, Switzerland
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Lyu D, Smith DL. The root signals in rhizospheric inter-organismal communications. FRONTIERS IN PLANT SCIENCE 2022; 13:1064058. [PMID: 36618624 PMCID: PMC9811129 DOI: 10.3389/fpls.2022.1064058] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Accepted: 12/06/2022] [Indexed: 06/17/2023]
Abstract
Root exudates play a key role in mediating plant-plant and plant-rhizomicrobiome interactions, including regulating biochemical/physiological aspects of plant-associated microorganisms, to enhance host plant growth and resilience. Root exudates can act as signals to reduce the competition from neighboring plants and recruiting/choreographing a wide range of diverse rhizomicrobiome members to make the host plant a good fit with its immediate environment. Root exudate production is a dynamic and key process, but there is a limited understanding of the metabolites or metabolic pathways involved in the inter-organismal communications facilitated by them. Given the well-known symbiotic relationships between plants and associated rhizomicrobiome members, adding root exudates to microbial isolation media may allow some of the large segments of rhizomicrobiome members that are not currently culturable to be grown in vitro. This will provide new insights into how root signals orchestrate associated microbes, will benefit agricultural production in the face of challenges posed by climate change, and will help to sustainably provide food for a growing global human population.
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Yang T, Yang S, Chen Z, Tan Y, Bol R, Duan H, He J. Global transcriptomic analysis reveals candidate genes associated with different phosphorus acquisition strategies among soybean varieties. FRONTIERS IN PLANT SCIENCE 2022; 13:1080014. [PMID: 36600925 PMCID: PMC9806128 DOI: 10.3389/fpls.2022.1080014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Accepted: 11/28/2022] [Indexed: 06/17/2023]
Abstract
Introduction Soybean adapts to phosphorus-deficient soils through three important phosphorus acquisition strategies, namely altered root conformation, exudation of carboxylic acids, and symbiosis with clumping mycorrhizal fungi. However, the trade-offs and regulatory mechanisms of these three phosphorus acquisition strategies in soybean have not been researched. Methods In this study, we investigated the responses of ten different soybean varieties to low soil phosphorus availability by determining biomass, phosphorus accumulation, root morphology, exudation, and mycorrhizal colonization rate. Furthermore, the molecular regulatory mechanisms underlying root phosphorus acquisition strategies were examined among varieties with different low-phosphorus tolerance using transcriptome sequencing and weighted gene co-expression network analysis. Results and discussion The results showed that two types of phosphorus acquisition strategies-"outsourcing" and "do-it-yourself"-were employed by soybean varieties under low phosphorus availability. The "do-it-yourself" varieties, represented by QD11, Zh30, and Sd, obtained sufficient phosphorus by increasing their root surface area and secreting carboxylic acids. In contrast, the "outsourcing" varieties, represented by Zh301, Zh13, and Hc6, used increased symbiosis with mycorrhizae to obtain phosphorus owing to their large root diameters. Transcriptome analysis showed that the direction of acetyl-CoA metabolism could be the dividing line between the two strategies of soybean selection. ERF1 and WRKY1 may be involved in the regulation of phosphorus acquisition strategies for soybeans grown under low P environments. These findings will enhance our understanding of phosphorus acquisition strategies in soybeans. In addition, they will facilitate the development of breeding strategies that are more flexible to accommodate a variety of production scenarios in agriculture under low phosphorus environments.
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Affiliation(s)
- Tongli Yang
- College of Agriculture, Guizhou University, Guiyang, China
| | - Songhua Yang
- College of Agriculture, Guizhou University, Guiyang, China
- Agricultural Ecological Environment and Resources Protection Station of Bijie Agricultural and Rural Bureau, Guiyang, China
| | - Zhu Chen
- College of Agriculture, Guizhou University, Guiyang, China
| | - Yuechen Tan
- Institute of Ecological Conservation and Restoration, Chinese Academy of Forestry, Beijing, China
| | - Roland Bol
- Institute of Bio- and Geosciences, Agrosphere (IBG-3), Forschungszentrum Jülich GmbH, Jülich, Germany
- School of Natural Sciences, Environment Centre Wales, Bangor University, Bangor, United Kingdom
| | - Honglang Duan
- Institute for Forest Resources & Environment of Guizhou, College of Forestry, Guizhou University, Guiyang, China
| | - Jin He
- College of Agriculture, Guizhou University, Guiyang, China
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Song B, Razavi BS, Pena R. Contrasting distribution of enzyme activities in the rhizosphere of European beech and Norway spruce. FRONTIERS IN PLANT SCIENCE 2022; 13:987112. [PMID: 36466222 PMCID: PMC9709443 DOI: 10.3389/fpls.2022.987112] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 10/26/2022] [Indexed: 06/17/2023]
Abstract
Recent policies and silvicultural management call for forest regeneration that involve the selection of tree species able to cope with low soil nutrient availability in forest ecosystems. Understanding the impact of different tree species on the rhizosphere processes (e.g., enzyme activities) involved in nutrient mobilisation is critical in selecting suitable species to adapt forests to environmental change. Here, we visualised and investigated the rhizosphere distribution of enzyme activities (cellobiohydrolase, leucine-aminopeptidase, and acid phosphomonoesterase) using zymography. We related the distribution of enzyme activities to the seedling root morphological traits of European beech (Fagus sylvatica) and Norway spruce (Picea abies), the two most cultivated temperate tree species that employ contrasting strategies in soil nutrient acquisition. We found that spruce showed a higher morphological heterogeneity along the roots than beech, resulting in a more robust relationship between rhizoplane-associated enzyme activities and the longitudinal distance from the root apex. The rhizoplane enzyme activities decreased in spruce and increased in beech with the distance from the root apex over a power-law equation. Spruce revealed broader rhizosphere extents of all three enzymes, but only acid phosphomonoesterase activity was higher compared with beech. This latter result was determined by a larger root system found in beech compared with spruce that enhanced cellobiohydrolase and leucine-aminopeptidase activities. The root hair zone and hair lengths were significant variables determining the distribution of enzyme activities in the rhizosphere. Our findings indicate that spruce has a more substantial influence on rhizosphere enzyme production and diffusion than beech, enabling spruce to better mobilise nutrients from organic sources in heterogeneous forest soils.
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Affiliation(s)
- Bin Song
- School of Geography and Ocean Science, Nanjing University, Nanjing, China
- Forest Botany and Tree Physiology, University of Göttingen, Göttingen, Germany
| | - Bahar S. Razavi
- Department of Soil and Plant Microbiome, Institute of Phytopathology, University of Kiel, Kiel, Germany
- Department of Agriculture Soil Science, University of Göttingen, Göttingen, Germany
| | - Rodica Pena
- Forest Botany and Tree Physiology, University of Göttingen, Göttingen, Germany
- Department of Sustainable Land Management, School of Agriculture, Policy and Development, University of Reading, Reading, United Kingdom
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Pantigoso HA, Newberger D, Vivanco JM. The rhizosphere microbiome: Plant-microbial interactions for resource acquisition. J Appl Microbiol 2022; 133:2864-2876. [PMID: 36648151 PMCID: PMC9796772 DOI: 10.1111/jam.15686] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Revised: 06/16/2022] [Accepted: 06/22/2022] [Indexed: 01/21/2023]
Abstract
While horticulture tools and methods have been extensively developed to improve the management of crops, systems to harness the rhizosphere microbiome to benefit plant crops are still in development. Plants and microbes have been coevolving for several millennia, conferring fitness advantages that expand the plant's own genetic potential. These beneficial associations allow the plants to cope with abiotic stresses such as nutrient deficiency across a wide range of soils and growing conditions. Plants achieve these benefits by selectively recruiting microbes using root exudates, positively impacting their nutrition, health and overall productivity. Advanced knowledge of the interplay between root exudates and microbiome alteration in response to plant nutrient status, and the underlying mechanisms there of, will allow the development of technologies to increase crop yield. This review summarizes current knowledge and perspectives on plant-microbial interactions for resource acquisition and discusses promising advances for manipulating rhizosphere microbiomes and root exudation.
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Affiliation(s)
- Hugo A. Pantigoso
- Center for Root and Rhizosphere Biology, Department of Horticulture and Landscape ArchitectureColorado State UniversityFort CollinsColorado80523‐1173United States
| | - Derek Newberger
- Center for Root and Rhizosphere Biology, Department of Horticulture and Landscape ArchitectureColorado State UniversityFort CollinsColorado80523‐1173United States
| | - Jorge M. Vivanco
- Center for Root and Rhizosphere Biology, Department of Horticulture and Landscape ArchitectureColorado State UniversityFort CollinsColorado80523‐1173United States
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Sallaku G, Rewald B, Sandén H, Balliu A. Scions impact biomass allocation and root enzymatic activity of rootstocks in grafted melon and watermelon plants. FRONTIERS IN PLANT SCIENCE 2022; 13:949086. [PMID: 36247619 PMCID: PMC9558002 DOI: 10.3389/fpls.2022.949086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Accepted: 09/16/2022] [Indexed: 06/16/2023]
Abstract
Vegetable grafting is increasingly recognized as an effective and sustainable plant production alternative. Grafted plants usually show increased uptake of water and minerals compared with self-rooted plants, mostly thought a consequence of the vigorous rootstocks selected. However, while studies frequently addressed the effects of rootstocks on the performance of scions, knowledge on the influences of scions on biomass allocation, morphology, and metabolic activity of roots is rare. In particular, the plasticity of root traits affecting resource acquisition and its efficiency remains poorly understood. Two different rootstock species, Cucurbita maxima × Cucurbita moschata and Lagenaria siceraria, were grafted in combination with melon (Cucumis melo) and watermelon (Citrullus lanatus). Self-grafted rootstocks were used as control. Plant biomass and root traits were determined after destructive harvesting 30 and/or 60 days after grafting. Traits included biomass allocation, leaf and root morphology, potential activities of four extracellular enzymes on root tips and basal root segments, and root respiration. Successfully grafted scions increase the ratio of root to whole plant dry matter (RMF), and increased ratios of root length to whole plant dry matter (RLR) and to plant leaf area (RL : LA). In contrast, morphological root traits such as diameter, tissue density, and specific root length remain surprisingly stable, and thus scion-induced changes of those traits may only play a minor role for the beneficial effects of grafting in Cucurbitaceae. Incompatibility in melon/L. siceraria grafts, however, was likely responsible for the reduced root growth in combination with clear changes in root morphological traits. Reduced root respiration rates seem to be the effects of a non-compatible rootstock-scion combination rather than an active, C-efficiency increasing acclimation. In contrast, heterografts with melon and watermelon frequently resulted in root-stock-specific, often enhanced potential enzymatic activities of acid phosphatase, β-glucosidase, leucine-amino-peptidase, and N-acetyl-glucosaminidase both at root tips and basal parts of lateral roots-presenting a potential and complementary mechanism of grafted plants to enhance nutrient foraging. The studied melon and watermelon scions may thus increase the nutrient foraging capacity of grafted plants by fostering the relative allocation of C to the root system, and enhancing the extracellular enzymatic activities governed by roots or their rhizobiome.
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Affiliation(s)
- Glenda Sallaku
- Faculty of Agriculture and Environment, Agricultural University of Tirana, Tirana, Albania
| | - Boris Rewald
- Department of Forest and Soil Sciences, University of Natural Resources and Life Sciences, Vienna (BOKU), Vienna, Austria
| | - Hans Sandén
- Department of Forest and Soil Sciences, University of Natural Resources and Life Sciences, Vienna (BOKU), Vienna, Austria
| | - Astrit Balliu
- Faculty of Agriculture and Environment, Agricultural University of Tirana, Tirana, Albania
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Liu Y, Xiao M, Shahbaz M, Hu Z, Zhu Z, Lu S, Yu Y, Yao H, Chen J, Ge T. Microplastics in soil can increase nutrient uptake by wheat. JOURNAL OF HAZARDOUS MATERIALS 2022; 438:129547. [PMID: 35999743 DOI: 10.1016/j.jhazmat.2022.129547] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 07/01/2022] [Accepted: 07/05/2022] [Indexed: 06/15/2023]
Abstract
Microplastics can perturb microbial nutrient-mining strategies. However, the mechanism by which microplastics affect the resource-acquisition strategies of crops in agricultural systems remains unknown. The nutrient-acquisition potential of crops and microbes was investigated under treatments with two common microplastics (polyethylene [PE] and polyvinyl chloride [PVC]) at 0%, 1%, and 5% (w/w). Different root resource-acquisition strategies disturbed microbial nutrient turnover in the rhizosphere in response to microplastic addition. Specifically, the β-1,4-glucosidase (BG) hotspot expanded, whereas the rhizosphere expansion of BG activity decreased. A decrease of less than PE1% (w/w) and an expansion of less than PE5% (w/w) in the 1,4-N-acetyl-glucosaminidase (NAG) hotspot with wider rhizosphere expansion of NAG activity indicated that higher doses of PE allow roots to uptake additional N. The phosphomonoesterase (PHOS) hotspot decreased in PE1% (w/w) and expanded in PE5% (w/w), but rhizosphere expansion did not change under PE treatments. However, both NAG and PHOS hotspots expanded with decreasing rhizosphere expansion under PVC treatments, indicating that PVC limits the utilization of available N and P, forcing the crop to obtain nutrients from the narrow root zone. These results indicate that adding PE microplastics increases the demand for and consumption of NH4+-N and NO3--N by wheat.
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Affiliation(s)
- Yuhuai Liu
- College of Life Sciences, Jiangxi Normal University, Nanchang 330022, PR China
| | - Mouliang Xiao
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Plant Virology, Ningbo University, Ningbo 315211, PR China
| | - Muhammad Shahbaz
- Centre for Environmental and Climate Science, Lund University, 223 62 Lund, Sweden
| | - Zhi'e Hu
- College of Life Sciences, Jiangxi Normal University, Nanchang 330022, PR China; State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Plant Virology, Ningbo University, Ningbo 315211, PR China
| | - Zhenke Zhu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Plant Virology, Ningbo University, Ningbo 315211, PR China
| | - Shunbao Lu
- College of Life Sciences, Jiangxi Normal University, Nanchang 330022, PR China.
| | - Yongxiang Yu
- Ningbo Key Lab of Urban Environment Process and Pollution Control, Ningbo Urban Environment Observation and Research Station-NUEORS, Chinese Academy of Sciences, Ningbo 315830, PR China; Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, PR China
| | - Huaiying Yao
- Ningbo Key Lab of Urban Environment Process and Pollution Control, Ningbo Urban Environment Observation and Research Station-NUEORS, Chinese Academy of Sciences, Ningbo 315830, PR China; Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, PR China
| | - Jianping Chen
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Plant Virology, Ningbo University, Ningbo 315211, PR China
| | - Tida Ge
- College of Life Sciences, Jiangxi Normal University, Nanchang 330022, PR China; State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Plant Virology, Ningbo University, Ningbo 315211, PR China.
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Luo M, Moorhead DL, Ochoa‐Hueso R, Mueller CW, Ying SC, Chen J. Nitrogen loading enhances phosphorus limitation in terrestrial ecosystems with implications for soil carbon cycling. Funct Ecol 2022. [DOI: 10.1111/1365-2435.14178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Min Luo
- Academy of Geography and Ecological Environment Fuzhou University Fuzhou China
- College of Environment and Safety Engineering Fuzhou University Fuzhou China
| | - Daryl L. Moorhead
- Department of Environmental Sciences University of Toledo Toledo OH USA
| | - Raúl Ochoa‐Hueso
- Department of Biology, IVAGRO University of Cádiz, Campus de Excelencia Internacional Agroalimentario (CeiA3), Campus del Rio San Pedro, 11510 Puerto Real Cádiz Spain
- Department of Terrestrial Ecology Netherlands Institute of Ecology (NIOO‐KNAW) AB Wageningen the Netherlands
| | - Carsten W. Mueller
- Department of Geosciences and Natural Resource Management University of Copenhagen Copenhagen Denmark
| | - Samantha C. Ying
- Environmental Sciences Department University of California‐ Riverside CA USA
| | - Ji Chen
- Department of Agroecology Aarhus University Tjele Denmark
- Aarhus University Centre for Circular Bioeconomy, Aarhus University Tjele Denmark
- iCLIMATE Interdisciplinary Centre for Climate Change Aarhus University Roskilde Denmark
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Luo L, Guo M, Wang E, Yin C, Wang Y, He H, Zhao C. Effects of mycorrhiza and hyphae on the response of soil microbial community to warming in eastern Tibetan Plateau. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 837:155498. [PMID: 35523342 DOI: 10.1016/j.scitotenv.2022.155498] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 04/20/2022] [Accepted: 04/20/2022] [Indexed: 06/14/2023]
Abstract
The effects of mycorrhiza and its external hyphae on the response of soil microbes to global warming remain unclear. This study investigates the role of mycorrhiza and its hyphae in regulating soil microbial community under warming by examining the microbial biomass and composition in the ingrowth cores of arbuscular mycorrhiza (AM) plant, Fargesia nitida, and ectomycorrhiza (ECM) plant, Picea asperata, with/without mycorrhiza/hyphae and experimental warming. The results showed that warming significantly increased the biomass of all soil microbes (by 19.89%-137.48%) and altered the microbial composition in both plant plots without mycorrhiza/hyphae. However, this effect was weakened in the presence of mycorrhiza or hyphae. In F. nitida plots, warming did not significantly affect biomass and composition of most soil microbial groups when mycorrhiza or hyphae were present. In P. asperata plots, warming significantly increased the total and ECM fungi (ECMF) biomass in the presence of hyphae (p < 0.05) and the total, Gn, and AM fungi (AMF) biomass in the presence of mycorrhiza (p < 0.05). Meanwhile, the response of enzyme activities to warming was also altered with mycorrhiza or hyphae. Additionally, soil microbial community composition was mainly influenced by soil available phosphorus (avaP), while enzyme activities depended on soil avaP, dissolved organic carbon (DOC), and nitrate concentrations. Our results indicate that mycorrhiza and its hyphae are essential in regulating the response of microbes to warming.
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Affiliation(s)
- Lin Luo
- State Environmental Protection Key Laboratory of Synergetic Control and Joint Remediation for Soil & Water Pollution, College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, PR China; CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, P.O. Box 416, Chengdu 610041, PR China; University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, PR China
| | - Min Guo
- College of Life Science, Sichuan Normal University, Chengdu, China
| | - Entao Wang
- Escuela Nacional de Ciencias Biologicas, Instituto Politecnico Nacional, Mexico 11340, Mexico
| | - Chunying Yin
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, P.O. Box 416, Chengdu 610041, PR China
| | - Yanjie Wang
- College of Life Science, Sichuan Normal University, Chengdu, China
| | - Heliang He
- CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, P.O. Box 416, Chengdu 610041, PR China; University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, PR China; College of Agriculture, Forestry and Food Engineering, Yibin University, Yibin 644007, China
| | - Chunzhang Zhao
- State Environmental Protection Key Laboratory of Synergetic Control and Joint Remediation for Soil & Water Pollution, College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, PR China.
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Shoaib M, Banerjee BP, Hayden M, Kant S. Roots’ Drought Adaptive Traits in Crop Improvement. PLANTS 2022; 11:plants11172256. [PMID: 36079644 PMCID: PMC9460784 DOI: 10.3390/plants11172256] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 08/26/2022] [Accepted: 08/26/2022] [Indexed: 11/16/2022]
Abstract
Drought is one of the biggest concerns in agriculture due to the projected reduction of global freshwater supply with a concurrent increase in global food demand. Roots can significantly contribute to improving drought adaptation and productivity. Plants increase water uptake by adjusting root architecture and cooperating with symbiotic soil microbes. Thus, emphasis has been given to root architectural responses and root–microbe relationships in drought-resilient crop development. However, root responses to drought adaptation are continuous and complex processes and involve additional root traits and interactions among themselves. This review comprehensively compiles and discusses several of these root traits such as structural, physiological, molecular, hydraulic, anatomical, and plasticity, which are important to consider together, with architectural changes, when developing drought resilient crop varieties. In addition, it describes the significance of root contribution in improving soil structure and water holding capacity and its implication on long-term resilience to drought. In addition, various drought adaptive root ideotypes of monocot and dicot crops are compared and proposed for given agroclimatic conditions. Overall, this review provides a broader perspective of understanding root structural, physiological, and molecular regulators, and describes the considerations for simultaneously integrating multiple traits for drought tolerance and crop improvement, under specific growing environments.
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Affiliation(s)
- Mirza Shoaib
- Agriculture Victoria, Grains Innovation Park, 110 Natimuk Road, Horsham, VIC 3400, Australia
- School of Applied Systems Biology, La Trobe University, Bundoora, Melbourne, VIC 3083, Australia
| | - Bikram P. Banerjee
- Agriculture Victoria, Grains Innovation Park, 110 Natimuk Road, Horsham, VIC 3400, Australia
| | - Matthew Hayden
- School of Applied Systems Biology, La Trobe University, Bundoora, Melbourne, VIC 3083, Australia
- Agriculture Victoria, AgriBio, Centre for AgriBioscience, 5 Ring Road, Bundoora, Melbourne, VIC 3083, Australia
| | - Surya Kant
- Agriculture Victoria, Grains Innovation Park, 110 Natimuk Road, Horsham, VIC 3400, Australia
- School of Applied Systems Biology, La Trobe University, Bundoora, Melbourne, VIC 3083, Australia
- Agriculture Victoria, AgriBio, Centre for AgriBioscience, 5 Ring Road, Bundoora, Melbourne, VIC 3083, Australia
- Correspondence:
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50
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Zhang C, Xue W, Xue J, Zhang J, Qiu L, Chen X, Hu F, Kardol P, Liu M. Leveraging functional traits of cover crops to coordinate crop productivity and soil health. J Appl Ecol 2022. [DOI: 10.1111/1365-2664.14264] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Chongzhe Zhang
- Soil Ecology Lab, College of Resources and Environmental Sciences Nanjing Agricultural University Nanjing China
- Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Key Laboratory of Biological Interaction and Crop Health Nanjing Agricultural University Nanjing China
| | - Wenfeng Xue
- Soil Ecology Lab, College of Resources and Environmental Sciences Nanjing Agricultural University Nanjing China
| | - Jingrong Xue
- Soil Ecology Lab, College of Resources and Environmental Sciences Nanjing Agricultural University Nanjing China
| | - Jing Zhang
- Soil Ecology Lab, College of Resources and Environmental Sciences Nanjing Agricultural University Nanjing China
- Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Key Laboratory of Biological Interaction and Crop Health Nanjing Agricultural University Nanjing China
| | - Lujie Qiu
- Soil Ecology Lab, College of Resources and Environmental Sciences Nanjing Agricultural University Nanjing China
| | - Xiaoyun Chen
- Soil Ecology Lab, College of Resources and Environmental Sciences Nanjing Agricultural University Nanjing China
- Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Key Laboratory of Biological Interaction and Crop Health Nanjing Agricultural University Nanjing China
| | - Feng Hu
- Soil Ecology Lab, College of Resources and Environmental Sciences Nanjing Agricultural University Nanjing China
| | - Paul Kardol
- Department of Forest Ecology and Management Swedish University of Agricultural Sciences Umeå Sweden
| | - Manqiang Liu
- Soil Ecology Lab, College of Resources and Environmental Sciences Nanjing Agricultural University Nanjing China
- Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Key Laboratory of Biological Interaction and Crop Health Nanjing Agricultural University Nanjing China
- Centre for Grassland Microbiome, College of Pastoral Agricultural Science and Technology Lanzhou University Lanzhou China
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