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Liu L, Gao Z, Li H, Yang W, Yang Y, Lin J, Wang Z, Liu J. Thresholds of Nitrogen and Phosphorus Input Substantially Alter Arbuscular Mycorrhizal Fungal Communities and Wheat Yield in Dryland Farmland. J Agric Food Chem 2024; 72:10236-10246. [PMID: 38647353 DOI: 10.1021/acs.jafc.4c00073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
Arbuscular mycorrhizal (AM) fungi are essential for preserving the multifunctionality of ecosystems. The nitrogen (N)/phosphorus (P) threshold that causes notable variations in the AM fungus community of the soil and plant productivity is still unclear. Herein, a long-term (18 years) field experiment with five N and five P fertilizer levels was conducted to investigate the change patterns of soil AM fungus, multifunctionality, and wheat yield. High-N and -P fertilizer inputs did not considerably increase the wheat yield. In the AM fungal network, a statistically significant positive correlation was observed between ecosystem multifunctionality and the biodiversity of two primary ecological clusters (N: Module #0 and P: Module #3). Furthermore, fertilizer input thresholds for N (92-160 kg ha-1) and P (78-100 kg ha-1) significantly altered the AM fungal community, soil characteristics, and plant productivity. Our study provided a basis for reduced N and P fertilizer application and sustainable agricultural development from the aspect of soil AM fungi.
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Affiliation(s)
- Lei Liu
- Key Laboratory of Plant Nutrition and Agro-environment in Northwest China, Ministry of Agriculture and Rural Affairs/College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Zhiyuan Gao
- Key Laboratory of Plant Nutrition and Agro-environment in Northwest China, Ministry of Agriculture and Rural Affairs/College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Haifeng Li
- Key Laboratory of Plant Nutrition and Agro-environment in Northwest China, Ministry of Agriculture and Rural Affairs/College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Wenjie Yang
- Key Laboratory of Plant Nutrition and Agro-environment in Northwest China, Ministry of Agriculture and Rural Affairs/College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yu Yang
- Key Laboratory of Plant Nutrition and Agro-environment in Northwest China, Ministry of Agriculture and Rural Affairs/College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Jiangyun Lin
- Key Laboratory of Plant Nutrition and Agro-environment in Northwest China, Ministry of Agriculture and Rural Affairs/College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Zhaohui Wang
- Key Laboratory of Plant Nutrition and Agro-environment in Northwest China, Ministry of Agriculture and Rural Affairs/College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Jinshan Liu
- Key Laboratory of Plant Nutrition and Agro-environment in Northwest China, Ministry of Agriculture and Rural Affairs/College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
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Ji C, Ge Y, Zhang H, Zhang Y, Xin Z, Li J, Zheng J, Liang Z, Cao H, Li K. Interactions between halotolerant nitrogen-fixing bacteria and arbuscular mycorrhizal fungi under saline stress. Front Microbiol 2024; 15:1288865. [PMID: 38633693 PMCID: PMC11022851 DOI: 10.3389/fmicb.2024.1288865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Accepted: 02/23/2024] [Indexed: 04/19/2024] Open
Abstract
Background and aims Soil salinity negatively affects crop development. Halotolerant nitrogen-fixing bacteria (HNFB) and arbuscular mycorrhizal fungi (AMF) are essential microorganisms that enhance crop nutrient availability and salt tolerance in saline soils. Studying the impact of HNFB on AMF communities and using HNFB in biofertilizers can help in selecting the optimal HNFB-AMF combinations to improve crop productivity in saline soils. Methods We established three experimental groups comprising apple plants treated with low-nitrogen (0 mg N/kg, N0), normal-nitrogen (200 mg N/kg, N1), and high-nitrogen (300 mg N/kg, N2) fertilizer under salt stress without bacteria (CK, with the addition of 1,500 mL sterile water +2 g sterile diatomite), or with bacteria [BIO, with the addition of 1,500 mL sterile water +2 g mixed bacterial preparation (including Bacillus subtilis HG-15 and Bacillus velezensis JC-K3)]. Results HNFB inoculation significantly increased microbial biomass and the relative abundance of beta-glucosidase-related genes in the rhizosphere soil under identical nitrogen application levels (p < 0.05). High-nitrogen treatment significantly reduced AMF diversity and the relative abundance of beta-glucosidase, acid phosphatase, and urea-related genes. A two-way analysis of variance showed that combined nitrogen application and HNFB treatment could significantly affect soil physicochemical properties and rhizosphere AMF abundance (p < 0.05). Specifically, HNFB application resulted in a significantly higher relative abundance of Glomus-MO-G17-VTX00114 compared to that in the CK group at equal nitrogen levels. Conclusion The impact of HNFB on the AMF community in apple rhizospheres is influenced by soil nitrogen levels. The study reveals how varying nitrogen levels mediate the relationship between exogenous HNFB, soil properties, and rhizosphere microbes.
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Affiliation(s)
- Chao Ji
- College of Seed and Facility Agricultural Engineering, Weifang University, Weifang, China
- Key Laboratory of Biochemistry and Molecular Biology in University of Shandong Province, Weifang University, Weifang, China
- Mountain Tai Forest Ecosystem Research Station of State Forestry and Grassland Administration, Shandong Agricultural University, Tai’an, China
- State Forestry and Grassland Administration Key Laboratory of Silviculture in Downstream Areas of the Yellow River, Shandong Agricultural University, Tai’an, China
| | - Yuhan Ge
- College of Biology and Oceanography, Weifang University, Weifang, China
| | - Hua Zhang
- College of Seed and Facility Agricultural Engineering, Weifang University, Weifang, China
- Key Laboratory of Biochemistry and Molecular Biology in University of Shandong Province, Weifang University, Weifang, China
| | - Yingxiang Zhang
- College of Seed and Facility Agricultural Engineering, Weifang University, Weifang, China
- Key Laboratory of Biochemistry and Molecular Biology in University of Shandong Province, Weifang University, Weifang, China
| | - Zhiwen Xin
- College of Seed and Facility Agricultural Engineering, Weifang University, Weifang, China
- Key Laboratory of Biochemistry and Molecular Biology in University of Shandong Province, Weifang University, Weifang, China
| | - Jian Li
- Shandong Institute of Pomology, Tai’an, China
| | - Jinghe Zheng
- College of Biology and Oceanography, Weifang University, Weifang, China
| | - Zengwen Liang
- College of Seed and Facility Agricultural Engineering, Weifang University, Weifang, China
- Key Laboratory of Biochemistry and Molecular Biology in University of Shandong Province, Weifang University, Weifang, China
| | - Hui Cao
- College of Seed and Facility Agricultural Engineering, Weifang University, Weifang, China
- Key Laboratory of Biochemistry and Molecular Biology in University of Shandong Province, Weifang University, Weifang, China
| | - Kun Li
- Mountain Tai Forest Ecosystem Research Station of State Forestry and Grassland Administration, Shandong Agricultural University, Tai’an, China
- State Forestry and Grassland Administration Key Laboratory of Silviculture in Downstream Areas of the Yellow River, Shandong Agricultural University, Tai’an, China
- Research Center for Forest Carbon Neutrality Engineering of Shandong Higher Education Institutions, Tai’an, Shandong, China
- Key Laboratory of Ecological Protection and Security Control of the Lower Yellow River of Shandong Higher Education Institutions, Tai’an, Shandong, China
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Wang F, Zhou ZH, Han DR, Wang M, Wei QG, Luo XB, Gao R, Zhang ZR, Fang JC. Research progress in parameterizing irrigation and fertilization in land surface model. Ying Yong Sheng Tai Xue Bao 2024; 35:543-554. [PMID: 38523113 DOI: 10.13287/j.1001-9332.202402.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/26/2024]
Abstract
Under the context of global climate change and growing population, irrigation and fertilization have become important ways to ensure food production, with consequences on water cycling, energy flow, and materials cycling in terrestrial ecosystems. In the land surface model (LSM), coupling irrigation and fertilization schemes are of great importance for clearly understanding the land-atmosphere interactions to ensure food security. We reviewed the expression methods of three key parameters, namely, the applied method, usage, and time in the parameterization process of irrigation and fertilization (nitrogen fertilizer) in LSM. We found that the ways to irrigate and ferti-lize in LSM are different from the ways used in actual practice due to the limitation of the high resolution of spatio-temporal data, which makes it difficult to understand the actual influences of irrigation and fertilization on grain yield, environment, and local climate. Finally, we proposed future works: 1) taking the differences of crop water demand into account and making the different irrigation thresholds for different crops to properly evaluate the total and intensity of water consumption of different crops; 2) using the field records and the regional grid data of fertilization and irrigation developed in recent years to develop parameterized schemes that are more in line with actual agricultural operations, which can accurately reveal their economic, ecological, and climatic effects; 3) developing fertilization diagnosis scheme considering crop type, phenological stage, and soil basic fertility as the supplementary scheme in LSM, to improve the applicability and simulation accuracy of LSM in the areas without nitrogen fertilizer data.
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Affiliation(s)
- Fei Wang
- Institute of Agricultural Information and Economics, Shandong Academy of Agricultural Sciences, Jinan 250010, China
| | - Zi-Han Zhou
- Institute of Agricultural Information and Economics, Shandong Academy of Agricultural Sciences, Jinan 250010, China
| | - Dong-Rui Han
- Institute of Agricultural Information and Economics, Shandong Academy of Agricultural Sciences, Jinan 250010, China
| | - Meng Wang
- Institute of Agricultural Information and Economics, Shandong Academy of Agricultural Sciences, Jinan 250010, China
| | - Qing-Gang Wei
- Institute of Agricultural Information and Economics, Shandong Academy of Agricultural Sciences, Jinan 250010, China
| | - Xiu-Bin Luo
- Institute of Agricultural Information and Economics, Shandong Academy of Agricultural Sciences, Jinan 250010, China
| | - Rui Gao
- Institute of Agricultural Information and Economics, Shandong Academy of Agricultural Sciences, Jinan 250010, China
| | - Zhuo-Ran Zhang
- Institute of Agricultural Information and Economics, Shandong Academy of Agricultural Sciences, Jinan 250010, China
| | - Jing-Chun Fang
- Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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Valliere JM, Irvine IC, Allen EB. Nitrogen deposition suppresses ephemeral post-fire plant diversity. Glob Chang Biol 2024; 30:e17117. [PMID: 38273574 DOI: 10.1111/gcb.17117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 12/12/2023] [Accepted: 12/13/2023] [Indexed: 01/27/2024]
Abstract
Fire is a dominant force shaping patterns of plant diversity in Mediterranean-type ecosystems. In these biodiversity hotspots, including California's endangered coastal scrub, many species remain hidden belowground as seeds and bulbs, only to emerge and flower when sufficient rainfall occurs after wildfire. The unique adaptations possessed by these species enable survival during prolonged periods of unfavorable conditions, but their continued persistence could be threatened by nonnative plant invasion and environmental change. Furthermore, their fleeting presence aboveground makes evaluating these threats in situ a challenge. For example, nitrogen (N) deposition resulting from air pollution is a well-recognized threat to plant diversity worldwide but impacts on fire-following species are not well understood. We experimentally evaluated the impact of N deposition on post-fire vegetation cover and richness for three years in stands of coastal sage scrub that had recently burned in a large wildfire in southern California. We installed plots receiving four levels of N addition that corresponded to the range of N deposition rates in the region. We assessed the impact of pre-fire invasion status on vegetation dynamics by including plots in areas that had previously been invaded by nonnative grasses, as well as adjacent uninvaded areas. We found that N addition reduced native forb cover in the second year post-fire while increasing the abundance of nonnative forbs. As is typical in fire-prone ecosystems, species richness declined over the three years of the study. However, N addition hastened this process, and native forb richness was severely reduced under high N availability, especially in previously invaded shrublands. An indicator species analysis also revealed that six functionally and taxonomically diverse forb species were especially sensitive to N addition. Our results highlight a new potential mechanism for the depletion of native species through the suppression of ephemeral post-fire bloom events.
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Affiliation(s)
- Justin M Valliere
- Department of Plant Sciences, University of California Davis, Davis, California, USA
- Department of Botany and Plant Sciences, University of California Riverside, Riverside, California, USA
| | | | - Edith B Allen
- Department of Botany and Plant Sciences, University of California Riverside, Riverside, California, USA
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Jang Y, Sharavdorj K, Ahn Y, Cho J. Effects of Planting Density and Nitrogen Fertilization on the Growth of Forage Rice in Reclaimed and General Paddy Fields. Plants (Basel) 2023; 13:13. [PMID: 38202321 PMCID: PMC10780310 DOI: 10.3390/plants13010013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 12/15/2023] [Accepted: 12/18/2023] [Indexed: 01/12/2024]
Abstract
The purpose of this study is to identify the different effects exerted by planting density and nitrogen fertilization on high-salinity reclaimed paddy fields (RPF) and general paddy fields (GPFs), and to find the amount of fertilization and the planting density suitable for the growth of forage rice in each paddy field. Nitrogen fertilization with high-salt and low-salt soils, an untreated control plot, treatment with 200 kg/ha, 300 kg/ha, and 400 kg/ha, and planting densities of 30 cm × 10 cm and 30 cm × 16 cm, growth, and feed values were investigated. In both experimental locations, there was no significant change in the soil due to N treatment, but in the case of RPF, electrical conductivity (EC) decreased significantly from more than 5 dS/m to up to 2.87 dS/m during the yellow ripe stage due to the influence of floods and concentrated precipitation in the fields. In all soils, as both the amount of N treatment and the planting density increased, there was a proportional relationship in which the number of tillers and the dry weight also increased, with the occurrence of lodging also being increased. The dry weight, as expected, was 1.5 times higher at a planting distance of 10 cm, rather than 16 cm. In addition, in both locations, the N treatment led to an increase in the dry weight, but when N treatment reached 400 kg/ha (2.0), the dry weight decreased instead. Moreover, although there was no clear difference in feed value according to N treatment, in RPF, the neutral detergent fiber (NDF) was higher than 60%, the relative feed value (RFV) was less than 98, and the total digestible nutrient (TDN) was also low, confirming that the quality of rice was higher in GPF.
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Affiliation(s)
- Yeongmi Jang
- Department of Crop Science, College of Agricultural and Life Sciences, Chungnam National University, 99, Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea; (Y.J.); (K.S.)
| | - Khulan Sharavdorj
- Department of Crop Science, College of Agricultural and Life Sciences, Chungnam National University, 99, Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea; (Y.J.); (K.S.)
| | - Youngjik Ahn
- Department of Horticulture and Forestry, Pai Chai University, 155-40, Baejae-ro, Seo-gu, Daejeon 35345, Republic of Korea;
| | - Jinwoong Cho
- Department of Crop Science, College of Agricultural and Life Sciences, Chungnam National University, 99, Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea; (Y.J.); (K.S.)
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Li H, Terrer C, Berdugo M, Maestre FT, Zhu Z, Peñuelas J, Yu K, Luo L, Gong JY, Ye JS. Nitrogen addition delays the emergence of an aridity-induced threshold for plant biomass. Natl Sci Rev 2023; 10:nwad242. [PMID: 37900195 PMCID: PMC10600907 DOI: 10.1093/nsr/nwad242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Revised: 09/05/2023] [Accepted: 09/11/2023] [Indexed: 10/31/2023] Open
Abstract
Crossing certain aridity thresholds in global drylands can lead to abrupt decays of ecosystem attributes such as plant productivity, potentially causing land degradation and desertification. It is largely unknown, however, whether these thresholds can be altered by other key global change drivers known to affect the water-use efficiency and productivity of vegetation, such as elevated CO2 and nitrogen (N). Using >5000 empirical measurements of plant biomass, we showed that crossing an aridity (1-precipitation/potential evapotranspiration) threshold of ∼0.50, which marks the transition from dry sub-humid to semi-arid climates, led to abrupt declines in aboveground biomass (AGB) and progressive increases in root:shoot ratios, thus importantly affecting carbon stocks and their distribution. N addition significantly increased AGB and delayed the emergence of its aridity threshold from 0.49 to 0.55 (P < 0.05). By coupling remote sensing estimates of leaf area index with simulations from multiple models, we found that CO2 enrichment did not alter the observed aridity threshold. By 2100, and under the RCP 8.5 scenario, we forecast a 0.3% net increase in the global land area exceeding the aridity threshold detected under a scenario that includes N deposition, in comparison to a 2.9% net increase if the N effect is not considered. Our study thus indicates that N addition could mitigate to a great extent the negative impact of increasing aridity on plant biomass in drylands. These findings are critical for improving forecasts of abrupt vegetation changes in response to ongoing global environmental change.
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Affiliation(s)
- Hailing Li
- State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems, College of Ecology, Lanzhou University, Lanzhou730000, China
| | - César Terrer
- Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Miguel Berdugo
- Instituto Multidisciplinar para el Estudio del Medio “Ramón Margalef,” Universidad de Alicante, Alicante 03690, Spain
- Institut de Biologia Evolutiva (CSIC-UPF), Barcelona08003, Spain
| | - Fernando T Maestre
- Instituto Multidisciplinar para el Estudio del Medio “Ramón Margalef,” Universidad de Alicante, Alicante 03690, Spain
- Departamento de Ecología, Universidad de Alicante, Alicante 03690, Spain
| | - Zaichun Zhu
- School of Urban Planning and Design, Peking University Shenzhen Graduate School, Peking University, Shenzhen518055, China
| | - Josep Peñuelas
- CSIC, Global Ecology Unit CREAF-CSIC-UAB, Barcelona 08193, Spain
- CREAF, Cerdanyola del Vallès, Barcelona 08193, Spain
| | - Kailiang Yu
- High Meadows Environmental Institute, Princeton University, Princeton, NJ 08544, USA
| | - Lin Luo
- State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems, College of Ecology, Lanzhou University, Lanzhou730000, China
| | - Jie-Yu Gong
- State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems, College of Ecology, Lanzhou University, Lanzhou730000, China
| | - Jian-Sheng Ye
- State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems, College of Ecology, Lanzhou University, Lanzhou730000, China
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Marshall JD, Tarvainen L, Zhao P, Lim H, Wallin G, Näsholm T, Lundmark T, Linder S, Peichl M. Components explain, but do eddy fluxes constrain? Carbon budget of a nitrogen-fertilized boreal Scots pine forest. New Phytol 2023; 239:2166-2179. [PMID: 37148187 DOI: 10.1111/nph.18939] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2022] [Accepted: 03/22/2023] [Indexed: 05/08/2023]
Abstract
Nitrogen (N) fertilization increases biomass and soil organic carbon (SOC) accumulation in boreal pine forests, but the underlying mechanisms remain uncertain. At two Scots pine sites, one undergoing annual N fertilization and the other a reference, we sought to explain these responses. We measured component fluxes, including biomass production, SOC accumulation, and respiration, and summed them into carbon budgets. We compared the resulting summations to ecosystem fluxes measured by eddy covariance. N fertilization increased most component fluxes (P < 0.05), especially SOC accumulation (20×). Only fine-root, mycorrhiza, and exudate production decreased, by 237 (SD = 28) g C m-2 yr-1 . Stemwood production increases were ascribed to this partitioning shift, gross primary production (GPP), and carbon-use efficiency, in that order. The methods agreed in their estimates of GPP in both stands (P > 0.05), but the components detected an increase in net ecosystem production (NEP) (190 (54) g C m-2 yr-1 ; P < 0.01) that eddy covariance did not (19 (62) g C m-2 yr-1 ; ns). The pairing of plots, the simplicity of the sites, and the strength of response provide a compelling description of N effects on the C budget. However, the disagreement between methods calls for further paired tests of N fertilization effects in simple forest ecosystems.
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Affiliation(s)
- John D Marshall
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences (SLU), Umeå, SE-901 83, Sweden
- Leibniz-Zentrum für Agrarlandschaftsforschung, Isotopen-Biogeochemie and Gasflüsse, Müncheberg, 15374, Germany
| | - Lasse Tarvainen
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences (SLU), Umeå, SE-901 83, Sweden
- Department of Biological and Environmental Sciences, University of Gothenburg, Gothenburg, SE-405 30, Sweden
| | - Peng Zhao
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences (SLU), Umeå, SE-901 83, Sweden
| | - Hyungwoo Lim
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences (SLU), Umeå, SE-901 83, Sweden
- Institute of Ecology and Earth Sciences, University of Tartu, Juhan Liivi 2, Tartu, 50409, Estonia
| | - Göran Wallin
- Department of Biological and Environmental Sciences, University of Gothenburg, Gothenburg, SE-405 30, Sweden
- Environmental Change Institute, School of Geography and the Environment, University of Oxford, South Parks Road, Oxford, OX1 3QY, UK
| | - Torgny Näsholm
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences (SLU), Umeå, SE-901 83, Sweden
| | - Tomas Lundmark
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences (SLU), Umeå, SE-901 83, Sweden
| | - Sune Linder
- Southern Swedish Forest Research Centre, SLU, PO Box 190, Lomma, SE-234 22, Sweden
| | - Matthias Peichl
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences (SLU), Umeå, SE-901 83, Sweden
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Fudjoe SK, Li L, Anwar S, Shi S, Xie J, Wang L, Xie L, Yongjie Z. Nitrogen fertilization promoted microbial growth and N 2O emissions by increasing the abundance of nirS and nosZ denitrifiers in semiarid maize field. Front Microbiol 2023; 14:1265562. [PMID: 37720157 PMCID: PMC10501401 DOI: 10.3389/fmicb.2023.1265562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Accepted: 08/18/2023] [Indexed: 09/19/2023] Open
Abstract
Nitrous oxide (N2O) emissions are a major source of gaseous nitrogen loss, causing environmental pollution. The low organic content in the Loess Plateau region, coupled with the high fertilizer demand of maize, further exacerbates these N losses. N fertilizers play a primary role in N2O emissions by influencing soil denitrifying bacteria, however, the underlying microbial mechanisms that contribute to N2O emissions have not been fully explored. Therefore, the research aimed to gain insights into the intricate relationships between N fertilization, soil denitrification, N2O emissions, potential denitrification activity (PDA), and maize nitrogen use efficiency (NUE) in semi-arid regions. Four nitrogen (N) fertilizer rates, namely N0, N1, N2, and N3 (representing 0, 100, 200, and 300 kg ha-1 yr.-1, respectively) were applied to maize field. The cumulative N2O emissions were 32 and 33% higher under N2 and 37 and 39% higher under N3 in the 2020 and 2021, respectively, than the N0 treatment. N fertilization rates impacted the abundance, composition, and network of soil denitrifying communities (nirS and nosZ) in the bulk and rhizosphere soil. Additionally, within the nirS community, the genera Cupriavidus and Rhodanobacter were associated with N2O emissions. Conversely, in the nosZ denitrifier, the genera Azospirillum, Mesorhizobium, and Microvirga in the bulk and rhizosphere soil reduced N2O emissions. Further analysis using both random forest and structural equation model (SEM) revealed that specific soil properties (pH, NO3--N, SOC, SWC, and DON), and the presence of nirS-harboring denitrification, were positively associated with PDA activities, respectively, and exhibited a significant association to N2O emissions and PDA activities but expressed a negative effect on maize NUE. However, nosZ-harboring denitrification showed an opposite trend, suggesting different effects on these variables. Our findings suggest that N fertilization promoted microbial growth and N2O emissions by increasing the abundance of nirS and nosZ denitrifiers and altering the composition of their communities. This study provides new insights into the relationships among soil microbiome, maize productivity, NUE, and soil N2O emissions in semi-arid regions.
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Affiliation(s)
- Setor Kwami Fudjoe
- State Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou, China
- College of Agronomy, Gansu Agricultural University, Lanzhou, China
| | - Lingling Li
- State Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou, China
- College of Agronomy, Gansu Agricultural University, Lanzhou, China
| | - Sumera Anwar
- Department of Botany, Government College Women University Faisalabad, Faisalabad, Pakistan
| | - Shangli Shi
- College of Grassland Science, Gansu Agricultural University, Lanzhou, China
| | - Junhong Xie
- State Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou, China
- College of Agronomy, Gansu Agricultural University, Lanzhou, China
| | - Linlin Wang
- State Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou, China
- College of Agronomy, Gansu Agricultural University, Lanzhou, China
| | - Lihua Xie
- State Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou, China
- College of Agronomy, Gansu Agricultural University, Lanzhou, China
| | - Zhou Yongjie
- State Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou, China
- College of Agronomy, Gansu Agricultural University, Lanzhou, China
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Vega-Mas I, Ascencio-Medina E, Bozal-Leorri A, González-Murua C, Marino D, González-Moro MB. Will crops with biological nitrification inhibition capacity be favored under future atmospheric CO 2? Front Plant Sci 2023; 14:1245427. [PMID: 37692431 PMCID: PMC10484480 DOI: 10.3389/fpls.2023.1245427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Accepted: 08/03/2023] [Indexed: 09/12/2023]
Affiliation(s)
- Izargi Vega-Mas
- *Correspondence: Izargi Vega-Mas, ; María Begoña González-Moro,
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Ullah S, Raza MM, Abbas T, Guan X, Zhou W, He P. Responses of soil microbial communities and enzyme activities under nitrogen addition in fluvo-aquic and black soil of North China. Front Microbiol 2023; 14:1249471. [PMID: 37664123 PMCID: PMC10469899 DOI: 10.3389/fmicb.2023.1249471] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 07/28/2023] [Indexed: 09/05/2023] Open
Abstract
This research investigates the impact of long-term nitrogen (N) addition on fluvo-aquic and black soils in north China, with a focus on soil microbial communities and enzyme activities. In each site, there were three N fertilization treatments, i.e., control, moderate-N, and high-N. Phospholipid Fatty Acid Analysis was employed to analyze the microbial community composition, and enzyme activities related to N, carbon (C), and phosphorus (P) cycling were assessed. The results showed that increasing N fertilization levels led to higher soil organic carbon (SOC) and total N (TN) concentrations, indicating enhanced nutrient availability. N fertilization reduced soil pH across both soils, with a more pronounced acidification effect observed in the black soil. Across both soils, N addition increased maize yield, but the higher crop yield was attained in moderate-N rate compared with high-N rate. Microbial community composition analysis revealed that N fertilization induced shifts in the relative abundances of specific microbial groups. The black soil exhibited pronounced shifts in the microbial groups compared to the fluvo-aquic soil, i.e., decreased fungal abundance and fungi: bacteria ratio in response to N input. In addition, the application of N fertilizer led to an elevated ratio of gram-positive to gram-negative (GP:GN) bacteria, but this effect was observed only in black soil. N fertilization had an impact on the enzyme activities related to C, N, and P cycling in both soil types, but black soil showed more pronounced changes in enzyme activities. Permutational multivariate analysis of variance indicated that soil types rather than N fertilization mediated the response of the soil microbial community and enzyme activities. Partial least square path modeling demonstrated that soil pH was the only key driver impacting soil microbial groups and enzyme activities in both soils. In conclusion, our findings highlighted that N fertilization exerted more pronounced impacts on soil biochemical properties, microbial community composition, and enzyme activities in black soil furthermore, moderate N rate resulted in higher crop productivity over high N rate.
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Affiliation(s)
- Sami Ullah
- Ministry of Agriculture Key Laboratory of Plant Nutrition and Fertilizer, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Science, Beijing, China
- ORIC, University of Baltistan, Skardu, Pakistan
| | - Muhammad Mohsin Raza
- Soil Environment and Chemistry Program, Land Resources Research Institute National Agriculture Research Center, Pakistan Agricultural Research Council, Islamabad, Pakistan
| | - Tanveer Abbas
- Ministry of Agriculture Key Laboratory of Plant Nutrition and Fertilizer, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Science, Beijing, China
| | - Xian Guan
- Mosaic Fertilizers (Beijing) Co., Ltd, Beijing, China
| | - Wei Zhou
- Ministry of Agriculture Key Laboratory of Plant Nutrition and Fertilizer, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Science, Beijing, China
| | - Ping He
- Ministry of Agriculture Key Laboratory of Plant Nutrition and Fertilizer, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Science, Beijing, China
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Gaspareto RN, Jalal A, Ito WCN, Oliveira CEDS, Garcia CMDP, Boleta EHM, Rosa PAL, Galindo FS, Buzetti S, Ghaley BB, Filho MCMT. Inoculation with Plant Growth-Promoting Bacteria and Nitrogen Doses Improves Wheat Productivity and Nitrogen Use Efficiency. Microorganisms 2023; 11:microorganisms11041046. [PMID: 37110469 PMCID: PMC10142644 DOI: 10.3390/microorganisms11041046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 04/08/2023] [Accepted: 04/10/2023] [Indexed: 04/29/2023] Open
Abstract
Wheat is one of the staple foods of the global population due to its adaptability to a wide range of environments. Nitrogen is one of the crucial limiting factors in wheat production and is considered a challenge to food security. Therefore, sustainable agricultural technologies such as seed inoculation with plant growth-promoting bacteria (PGPBs) can be adopted to promote biological nitrogen fixation (BNF) for higher crop productivity. In this context, the objective of the current study was to evaluate the effects of nitrogen fertilization and seed inoculations with Azospirillum brasilense, Bacillus subtilis and A. brasilense + B. subtilis on agronomic and yield attributes, grain yield, grain N accumulation, N use efficiency and applied N recovery in Brazilian Cerrado, which consists of gramineous woody savanna. The experiment was carried out in two cropping seasons in Rhodic Haplustox soil under a no-tillage system. The experiment was designed in a randomized complete block in a 4 × 5 factorial scheme, with four replications. The treatments consisted of four seed inoculations (control-without inoculation, inoculation with A. brasilense, B. subtilis and A. brasilense + B. subtilis) under five N doses (0, 40, 80, 120 and 160 kg ha-1, applied from urea) at the wheat tillering stage. Seed co-inoculation with A. brasilense + B. subtilis increased grain N accumulation, number of spikes m-1, grains spike-1 and grain yield of wheat in an irrigated no-tillage system of tropical savannah, regardless of the applied N doses. Nitrogen fertilization at a dose of 80 kg ha-1 significantly increased grain N accumulation and number of grains spikes-1 and nitrogen use efficiency. Recovery of applied N was increased with inoculation of B. subtilis and co-inoculation of A. brasilense + B. subtilis at increasing N doses. Therefore, N fertilization can be reduced by the inclusion of co-inoculation with A. brasilense + B. subtilis in the cultivation of winter wheat under a no-tillage system of Brazilian Cerrado.
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Affiliation(s)
- Rafaela Neris Gaspareto
- Department of Plant Protection, Rural Engineering and Soils (DEFERS), São Paulo State University (UNESP), Ilha Solteira 15385-000, SP, Brazil
| | - Arshad Jalal
- Department of Plant Protection, Rural Engineering and Soils (DEFERS), São Paulo State University (UNESP), Ilha Solteira 15385-000, SP, Brazil
| | - William Cesar Nishimoto Ito
- Department of Plant Protection, Rural Engineering and Soils (DEFERS), São Paulo State University (UNESP), Ilha Solteira 15385-000, SP, Brazil
| | - Carlos Eduardo da Silva Oliveira
- Department of Plant Protection, Rural Engineering and Soils (DEFERS), São Paulo State University (UNESP), Ilha Solteira 15385-000, SP, Brazil
| | - Cássia Maria de Paula Garcia
- Department of Plant Protection, Rural Engineering and Soils (DEFERS), São Paulo State University (UNESP), Ilha Solteira 15385-000, SP, Brazil
| | | | - Poliana Aparecida Leonel Rosa
- Department of Plant Protection, Rural Engineering and Soils (DEFERS), São Paulo State University (UNESP), Ilha Solteira 15385-000, SP, Brazil
| | - Fernando Shintate Galindo
- Department of Crop Production, College of Agricultural and Technology Sciences, São Paulo State University (UNESP), Dracena 17900-000, SP, Brazil
| | - Salatiér Buzetti
- Department of Plant Protection, Rural Engineering and Soils (DEFERS), São Paulo State University (UNESP), Ilha Solteira 15385-000, SP, Brazil
| | - Bhim Bahadur Ghaley
- Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, 2630 Taastrup, Denmark
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12
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Cen Z, Zheng Y, Guo Y, Yang S, Dong Y. Nitrogen Fertilization in a Faba Bean-Wheat Intercropping System Can Alleviate the Autotoxic Effects in Faba Bean. Plants (Basel) 2023; 12:plants12061232. [PMID: 36986921 PMCID: PMC10057412 DOI: 10.3390/plants12061232] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Revised: 02/02/2023] [Accepted: 02/17/2023] [Indexed: 05/21/2023]
Abstract
Continuous cultivation of the faba bean will lead to its autotoxicity. Faba bean-wheat intercropping can effectively alleviate the autotoxicity of the faba bean. In order to investigate the autotoxicity of water extracts of various parts of the faba bean, we prepared water extracts of various parts of the faba bean, such as the roots, stems, leaves, and rhizosphere soil. The results showed various parts of the faba bean significantly inhibited the germination of faba bean seeds. The main autotoxins in these parts were analyzed using HPLC. Six autotoxins, namely, p-hydroxybenzoic acid, vanillic acid, salicylic acid, ferulic acid, benzoic acid, and cinnamic acid, were identified. The exogenous addition of these six autotoxins significantly inhibited the germination of faba bean seeds in a concentration-dependent manner. Furthermore, field experiments were conducted to investigate the effects of various levels of nitrogen fertilizer on the autotoxin content and the aboveground dry weight of the faba bean in a faba bean-wheat intercropping system. The application of various levels of nitrogen fertilizer in the faba bean-wheat intercropping system could significantly reduce the content of autotoxins and increase the aboveground dry weight in faba bean, particularly at the N2 level (90 kg/hm2). The above results showed that the water extracts of faba bean roots, stems, leaves, and rhizosphere soil inhibited faba bean seed germination. The autotoxicity in faba bean under continuous cropping could be caused by p-hydroxybenzoic acid, vanillic acid, salicylic acid, ferulic acid, benzoic acid, and cinnamic acid. The autotoxic effects in the faba bean were effectively mitigated by the application of nitrogen fertilizer in a faba bean-wheat intercropping system.
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Yu Z, Gao Q, Guo X, Peng J, Qi Q, Chen X, Gao M, Mo C, Feng Z, Wong MH, Yang Y, Li H. Phylogenetic Conservation of Soil Microbial Responses to Elevated Tropospheric Ozone and Nitrogen Fertilization. mSystems 2023; 8:e0072122. [PMID: 36625584 DOI: 10.1128/msystems.00721-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Plant primary productivity and crop yields have been reduced due to the doubled level of global tropospheric ozone. Little is known about how elevated ozone affects soil microbial communities in the cropland ecosystem and whether such effects are sensitive to the nitrogen (N) supply. Here, we examined the responses of bacterial and fungal communities in maize soils to elevated ozone (+60 ppb ozone) across different levels of N fertilization (+60, +120, and +240 kg N ha-1yr-1). The fungal alpha diversity was decreased (P < 0.05), whereas the bacterial alpha diversity displayed no significant change under elevated ozone. Significant (P < 0.05) effects of N fertilization and elevated ozone on both the bacterial and fungal communities were observed. However, no interactive effects between N fertilization and elevated ozone were observed for bacterial and fungal communities (P > 0.1). The bacterial responses to N fertilization as well as the bacterial and fungal responses to elevated ozone were all phylogenetically conserved, showing universal homogeneous selection (homogeneous environmental conditions leading to more similar community structures). In detail, bacterial Alphaproteobacteria, Actinobacteria, and Chloroflexi, as well as fungal Ascomycota, were increased by elevated ozone, whereas bacterial Gammaproteobacteria, Bacteroidetes, and Elusimicrobia, as well as fungal Glomeromycota, were decreased by elevated ozone (P < 0.05). These ozone-responsive phyla were generally correlated (P < 0.05) with plant biomass, plant carbon (C) uptake, and soil dissolved organic C, demonstrating that elevated ozone affects plant-microbe interactions. Our study highlighted that microbial responses to elevated ozone display a phylogenetic clustering pattern, suggesting that response strategies to elevated ozone stress may be phylogenetically conserved ecological traits. IMPORTANCE The interactions of plant and soil microbial communities support plant growth and health. The increasing tropospheric ozone decreases crop biomass and also alters soil microbial communities, but the ways in which crops and their associated soil microbial communities respond to elevated tropospheric ozone are not clear, and it is also obscure whether the interactions between ozone and the commonly applied N fertilization exist. We showed that the microbial responses to both elevated ozone and N fertilization were phylogenetically conserved. However, the microbial communities that responded to N fertilization and elevated ozone were different, and this was further verified by the lack of an interactive effect between N fertilization and elevated ozone. Given that the global tropospheric ozone concentration will continue to increase in the coming decades, the decrease of specific microbial populations caused by elevated ozone would result in the extinction of certain microbial taxa. This ozone-induced effect will further harm crop production, and awareness is urgently needed.
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Ma Y, Zhang S, Feng D, Duan N, Rong L, Wu Z, Shen Y. Effect of different doses of nitrogen fertilization on bioactive compounds and antioxidant activity of brown rice. Front Nutr 2023; 10:1071874. [PMID: 36819670 PMCID: PMC9936061 DOI: 10.3389/fnut.2023.1071874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Accepted: 01/16/2023] [Indexed: 02/05/2023] Open
Abstract
Brown rice as a whole grain food is associated with various chronic diseases' reduced risks. In this study, the effects of different doses of nitrogen fertilization (0, 160, 210, 260, 315, and 420 kg N/ 100 m2) on bioactive compounds and antioxidant activity of brown rice (yanfeng47) were investigated. At nitrogen level of 210-260 kg N/100 m2, the content of TFC (302.65 mg/100 g), β-sitosterol (1762.92 mg/100 g), stigmasterol (1358.735 mg/100 g), DPPH (74.57%), and OH free radical scavenging (74.19%) was the highest. The major phenolic acid was p-hydroxybenzoic acid. There were significant positive linear relationships between TFC (0.872, 0.843), β-sitosterol (0.896, 0.657), stigmasterol (0.543, 0.771), p-hydroxybenzoic acid (0.871, 0.875), and DPPH, OH antioxidant activity. These indicated that TFC and phytosterols were the most important components in brown rice that had strong antioxidant activity. Composite score of principal components indicated 210 Kg N/100 m2 exhibited a more ideal dose of nitrogen for nutritional composition and antioxidant activity of brown rice.
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Affiliation(s)
- Yichao Ma
- College of Food Science, Shenyang Agricultural University, Shenyang, China
| | - Shuang Zhang
- College of Food Science, Shenyang Agricultural University, Shenyang, China
| | - Daguang Feng
- College of Science, Shenyang Agricultural University, Shenyang, China
| | - Nuoqi Duan
- College of Food Science, Shenyang Agricultural University, Shenyang, China
| | - Liyan Rong
- College of Food Science, Shenyang Agricultural University, Shenyang, China
| | - Zhaoxia Wu
- College of Food Science, Shenyang Agricultural University, Shenyang, China,*Correspondence: Zhaoxia Wu,
| | - Yixiao Shen
- College of Food Science, Shenyang Agricultural University, Shenyang, China,Yixiao Shen,
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Marcianò D, Ricciardi V, Maddalena G, Massafra A, Marone Fassolo E, Masiero S, Bianco PA, Failla O, De Lorenzis G, Toffolatti SL. Influence of Nitrogen on Grapevine Susceptibility to Downy Mildew. Plants (Basel) 2023; 12:263. [PMID: 36678977 PMCID: PMC9867458 DOI: 10.3390/plants12020263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 01/02/2023] [Accepted: 01/04/2023] [Indexed: 06/17/2023]
Abstract
Downy mildew, caused by the obligate parasite Plasmopara viticola, is one of the most important threats to viticulture. The exploitation of resistant and susceptibility traits of grapevine is one of the most promising ways to increase the sustainability of disease management. Nitrogen (N) fertilization is known for influencing disease severity in the open field, but no information is available on its effect on plant-pathogen interaction. A previous RNAseq study showed that several genes of N metabolism are differentially regulated in grapevine upon P. viticola inoculation, and could be involved in susceptibility or resistance to the pathogen. The aim of this study was to evaluate if N fertilization influences: (i) the foliar leaf content and photosynthetic activity of the plant, (ii) P. viticola infectivity, and (iii) the expression of the candidate susceptibility/resistance genes. Results showed that N level positively correlated with P. viticola infectivity, confirming that particular attention should be taken in vineyard to the fertilization, but did not influence the expression of the candidate genes. Therefore, these genes are manipulated by the pathogen and can be exploited for developing new, environmentally friendly disease management tools, such as dsRNAs, to silence the susceptibility genes or breeding for resistance.
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Affiliation(s)
- Demetrio Marcianò
- Department of Agricultural and Environmental Sciences, University of Milan, 20133 Milano, Italy
| | - Valentina Ricciardi
- Department of Agricultural and Environmental Sciences, University of Milan, 20133 Milano, Italy
| | - Giuliana Maddalena
- Department of Agricultural and Environmental Sciences, University of Milan, 20133 Milano, Italy
- Department of Biosciences, University of Milan, 20133 Milano, Italy
| | | | | | - Simona Masiero
- Department of Biosciences, University of Milan, 20133 Milano, Italy
| | - Piero Attilio Bianco
- Department of Agricultural and Environmental Sciences, University of Milan, 20133 Milano, Italy
| | - Osvaldo Failla
- Department of Agricultural and Environmental Sciences, University of Milan, 20133 Milano, Italy
| | - Gabriella De Lorenzis
- Department of Agricultural and Environmental Sciences, University of Milan, 20133 Milano, Italy
| | - Silvia Laura Toffolatti
- Department of Agricultural and Environmental Sciences, University of Milan, 20133 Milano, Italy
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16
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Malaka MJ, Araya NA, Soundy P, du Plooy CP, Araya HT, Jansen Van Rensburg WS, Watkinson E, Levember E, Wadiwala E, Amoo SO. Biomass, Essential Oil Yield, and Composition of Marjoram as Influenced by Interactions of Different Agronomic Practices under Controlled Conditions. Plants (Basel) 2022; 12:173. [PMID: 36616302 PMCID: PMC9824495 DOI: 10.3390/plants12010173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 12/25/2022] [Accepted: 12/27/2022] [Indexed: 06/17/2023]
Abstract
Origanum marjorana L. has been valued for centuries for its flavoring attributes and therapeutic properties. The growing demand for its various applications necessitates optimizing agronomic practices for its production. A glasshouse pot trial was conducted to identify optimum agronomic practices for increased herbage and oil yield, as well as oil quality. The effects of varying air temperature regimes (low, medium, and high levels), irrigation (low, medium, and high levels), nitrogen fertilizer application (N = 100, 150, and 200 kg/ha), and soil type (sandy loam, sandy clay loam, and loamy sand) on the productivity of marjoram plants were investigated. The results showed an increase in plant growth and herbage yield as well as chlorophyll content under conditions of high air temperature, low irrigation, and moderate to high nitrogen level applied to sandy loam soil, with an increase in oil yield with loamy sand soil. The major compounds observed in marjoram essential oil were terpinene-4-ol (22.63-36.72%) and (Z)-β-terpineol (6.85-16.60%), in which terpinene-4-ol was not found to be within the International Organization for Standardization (ISO) limits of acceptability while (Z)-β- terpineol had no reference limits available. A promising performance of marjoram cultivation under high regimes of air temperature (16.7 to 36.6 °C), nitrogen fertilization (200 kg ha-1 N), and low irrigation (up to 60% soil water depletion from field capacity) on sandy loam soils was demonstrated for improved crop productivity.
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Affiliation(s)
- Mantwampe Johleen Malaka
- Agricultural Research Council-Vegetable, Industrial and Medicinal Plants, Private Bag X293, Pretoria 0001, South Africa
- Department of Crop Sciences, Tshwane University of Technology, Private Bag X680, Pretoria 0001, South Africa
| | - Nadia Alcina Araya
- Agricultural Research Council-Vegetable, Industrial and Medicinal Plants, Private Bag X293, Pretoria 0001, South Africa
| | - Puffy Soundy
- Department of Crop Sciences, Tshwane University of Technology, Private Bag X680, Pretoria 0001, South Africa
| | - Christian Phillipus du Plooy
- Agricultural Research Council-Vegetable, Industrial and Medicinal Plants, Private Bag X293, Pretoria 0001, South Africa
| | - Hintsa Tesfamicael Araya
- Agricultural Research Council-Vegetable, Industrial and Medicinal Plants, Private Bag X293, Pretoria 0001, South Africa
| | | | - Eric Watkinson
- Department of Science and Innovation, Private Bag X894, Pretoria 0001, South Africa
| | - Ellis Levember
- South African Essential Oils Business Incubator, 19 Mountain Street, Derdepoort 0186, Pretoria, South Africa
| | - Ebrahim Wadiwala
- Council for Scientific and Industrial Research, P.O. Box 395, Meiring Naude Road, Brummeria, Pretoria 0001, South Africa
| | - Stephen Oluwaseun Amoo
- Agricultural Research Council-Vegetable, Industrial and Medicinal Plants, Private Bag X293, Pretoria 0001, South Africa
- Department of Botany and Plant Biotechnology, University of Johannesburg, P.O. Box 524, Auckland Park, Johannesburg 2006, South Africa
- Indigenous Knowledge Systems Centre, Faculty of Natural and Agricultural Sciences, North-West University, Private Bag X2046, Mmabatho 2790, South Africa
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Sugier D, Sugier P, Jakubowicz-Gil J, Gawlik-Dziki U, Zając A, Król B, Chmiel S, Kończak M, Pięt M, Paduch R. Nitrogen Fertilization and Solvents as Factors Modifying the Antioxidant and Anticancer Potential of Arnica montana L. Flower Head Extracts. Plants (Basel) 2022; 12:142. [PMID: 36616270 PMCID: PMC9824058 DOI: 10.3390/plants12010142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Revised: 12/16/2022] [Accepted: 12/21/2022] [Indexed: 06/17/2023]
Abstract
Arnica montana L. is one of Europe's endemic endangered medicinal plants, with diverse biological activities commonly used in medicine, pharmacy, and cosmetics. Its flower heads are a rich source of raw material, with antibacterial, antifungal, antiseptic, anti-inflammatory, antiradical, antioxidant, and antitumor properties. The objective of the present study was (i) to characterize the chemical composition of flower heads of A. montana plants cultivated under nitrogen fertilization, (ii) to identify the impact of the nitrogen fertilization and extraction method (water, ethanol) on the antioxidant activity of extracts, and (iii) to determine the role of different nitrogen doses applied during plant cultivation and different extraction methods in the anticancer activity of the extracts through analysis of apoptosis and autophagy induction in HT29, HeLa, and SW620 cell lines. The present study shows that nitrogen is a crucial determinant of the chemical composition of arnica flower heads and the antioxidant and anticancer activity of the analyzed extracts. Nitrogen fertilization can modify the composition of pharmacologically active substances (sesquiterpene lactones, flavonoids, essential oil) in Arnicae flos. The content of sesquiterpene lactones, flavonoids, and essential oil increased with the increase in the nitrogen doses to 60 kg N ha-1 by 0.66%, 1.45%, and 0.27%, respectively. A further increase in the nitrogen dose resulted in a decrease in the content of the analyzed secondary metabolites. Varied levels of nitrogen application can be regarded as a relevant way to modify the chemical composition of arnica flower heads and to increase the anticancer activity, which was confirmed by the increase in the level of apoptosis with the increase in fertilization to a level of 60 kg N ha-1. The fertilization of arnica plants with low doses of nitrogen (30 and 60 kg N ha-1) significantly increased the LOX inhibition ability of the ethanol extracts. The present study is the first report on the anticancer activity of A. montana water extracts, with emphasis on the role of water as a solvent. In further studies of factors modifying the quality of Arnicae flos, attention should be paid to the simultaneous use of nitrogen and other microelements to achieve synergistic results and to the possibility of a more frequent use of water as a solvent in studies on the biological activity of A. montana extracts.
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Affiliation(s)
- Danuta Sugier
- Department of Industrial and Medicinal Plants, University of Life Sciences in Lublin, 15 Akademicka Street, 20-950 Lublin, Poland
| | - Piotr Sugier
- Department of Botany, Mycology and Ecology, Institute of Biological Sciences, Maria Curie-Skłodowska University, 19 Akademicka Street, 20-033 Lublin, Poland
| | - Joanna Jakubowicz-Gil
- Department of Functional Anatomy and Cytobiology, Institute of Biological Sciences, Maria Curie-Skłodowska University, 19 Akademicka Street, 20-033 Lublin, Poland
| | - Urszula Gawlik-Dziki
- Department of Biochemistry and Food Chemistry, University of Life Sciences in Lublin, 8 Skromna Street, 20-704 Lublin, Poland
| | - Adrian Zając
- Department of Functional Anatomy and Cytobiology, Institute of Biological Sciences, Maria Curie-Skłodowska University, 19 Akademicka Street, 20-033 Lublin, Poland
| | - Beata Król
- Department of Industrial and Medicinal Plants, University of Life Sciences in Lublin, 15 Akademicka Street, 20-950 Lublin, Poland
| | - Stanisław Chmiel
- Department of Hydrology and Climatology, Institute of Earth and Environmental Sciences, Maria Curie-Skłodowska University, Kraśnicka Av. 2d, 20-718 Lublin, Poland
| | - Magdalena Kończak
- Institute of Earth and Environmental Sciences, Maria Curie-Skłodowska University, Kraśnicka Av. 2d, 20-718 Lublin, Poland
| | - Mateusz Pięt
- Department of Virology and Immunology, Institute of Biological Sciences, 19 Akademicka Street, 20-033 Lublin, Poland
| | - Roman Paduch
- Department of Virology and Immunology, Institute of Biological Sciences, 19 Akademicka Street, 20-033 Lublin, Poland
- Department of General and Pediatric Ophthalmology, Medical University of Lublin, 1 Chmielna Street, 20-079 Lublin, Poland
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Duan N, Radosevich M, Zhuang J, DeBruyn JM, Staton M, Schaeffer SM. Identification of Novel Viruses and Their Microbial Hosts from Soils with Long-Term Nitrogen Fertilization and Cover Cropping Management. mSystems 2022; 7:e0057122. [PMID: 36445691 DOI: 10.1128/msystems.00571-22] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Soils are the largest organic carbon reservoir and are key to global biogeochemical cycling, and microbes are the major drivers of carbon and nitrogen transformations in the soil systems. Thus, virus infection-induced microbial mortality could impact soil microbial structure and functions. In this study, we recovered 260 viral operational taxonomic units (vOTUs) in samples collected from soil taken from four nitrogen fertilization (N-fertilization) and cover-cropping practices at an experimental site under continuous cotton production evaluating conservation agricultural management systems for more than 40 years. Only ~6% of the vOTUs identified were clustered with known viruses in the RefSeq database using a gene-sharing network. We found that 14% of 260 vOTUs could be linked to microbial hosts that cover key carbon and nitrogen cycling taxa, including Acidobacteriota, Proteobacteria, Verrucomicrobiota, Firmicutes, and ammonia-oxidizing archaea, i.e., Nitrososphaeria (phylum Thermoproteota). Viral diversity, community structure, and the positive correlation between abundance of a virus and its host indicate that viruses and microbes are more sensitive to N-fertilization than cover-cropping treatment. Viruses may influence key carbon and nitrogen cycling through control of microbial function and host populations (e.g., Chthoniobacterales and Nitrososphaerales). These findings provide an initial view of soil viral ecology and how it is influenced by long-term conservation agricultural management. IMPORTANCE Bacterial viruses are extremely small and abundant particles that can control the microbial abundance and community composition through infection, which gradually showed their vital roles in the ecological process to influence the nutrient flow. Compared to the substrate control, less is known about the influence of soil viruses on microbial community function, and even less is known about microbial and viral diversity in the soil system. To obtain a more complete knowledge of microbial function dynamics, the interaction between microbes and viruses cannot be ignored. To fully understand this process, it is fundamental to get insight into the correlation between the diversity of viral communities and bacteria which could induce these changes.
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Lisker A, Maurer A, Schmutzer T, Kazman E, Cöster H, Holzapfel J, Ebmeyer E, Alqudah AM, Sannemann W, Pillen K. A Haplotype-Based GWAS Identified Trait-Improving QTL Alleles Controlling Agronomic Traits under Contrasting Nitrogen Fertilization Treatments in the MAGIC Wheat Population WM-800. Plants (Basel) 2022; 11:3508. [PMID: 36559621 PMCID: PMC9784842 DOI: 10.3390/plants11243508] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 11/27/2022] [Accepted: 12/07/2022] [Indexed: 06/17/2023]
Abstract
The multi-parent-advanced-generation-intercross (MAGIC) population WM-800 was developed by intercrossing eight modern winter wheat cultivars to enhance the genetic diversity present in breeding populations. We cultivated WM-800 during two seasons in seven environments under two contrasting nitrogen fertilization treatments. WM-800 lines exhibited highly significant differences between treatments, as well as high heritabilities among the seven agronomic traits studied. The highest-yielding WM-line achieved an average yield increase of 4.40 dt/ha (5.2%) compared to the best founder cultivar Tobak. The subsequent genome-wide-association-study (GWAS), which was based on haplotypes, located QTL for seven agronomic traits including grain yield. In total, 40, 51, and 46 QTL were detected under low, high, and across nitrogen treatments, respectively. For example, the effect of QYLD_3A could be associated with the haplotype allele of cultivar Julius increasing yield by an average of 4.47 dt/ha (5.2%). A novel QTL on chromosome 2B exhibited pleiotropic effects, acting simultaneously on three-grain yield components (ears-per-square-meter, grains-per-ear, and thousand-grain-weight) and plant-height. These effects may be explained by a member of the nitrate-transporter-1 (NRT1)/peptide-family, TaNPF5.34, located 1.05 Mb apart. The WM-800 lines and favorable QTL haplotypes, associated with yield improvements, are currently implemented in wheat breeding programs to develop advanced nitrogen-use efficient wheat cultivars.
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Affiliation(s)
- Antonia Lisker
- Institute of Agricultural and Nutritional Sciences, Martin-Luther-University Halle-Wittenberg, Betty-Heimann-Str. 3, 06120 Halle, Germany
| | - Andreas Maurer
- Institute of Agricultural and Nutritional Sciences, Martin-Luther-University Halle-Wittenberg, Betty-Heimann-Str. 3, 06120 Halle, Germany
| | - Thomas Schmutzer
- Institute of Agricultural and Nutritional Sciences, Martin-Luther-University Halle-Wittenberg, Betty-Heimann-Str. 3, 06120 Halle, Germany
| | - Ebrahim Kazman
- Syngenta Seeds GmbH, Kroppenstedter Str. 4, 39387 Oschersleben, Germany
| | | | - Josef Holzapfel
- Secobra Saatzucht GmbH, Feldkirchen 3, 85368 Moosburg an der Isar, Germany
| | - Erhard Ebmeyer
- KWS Lochow GMBH, Ferdinand-Lochow-Str. 5, 29303 Bergen, Germany
| | - Ahmad M. Alqudah
- Biological Science Program, Department of Biological and Environmental Sciences, College of Art and Science, Qatar University, Doha P.O. Box 2713, Qatar
| | - Wiebke Sannemann
- Institute of Agricultural and Nutritional Sciences, Martin-Luther-University Halle-Wittenberg, Betty-Heimann-Str. 3, 06120 Halle, Germany
| | - Klaus Pillen
- Institute of Agricultural and Nutritional Sciences, Martin-Luther-University Halle-Wittenberg, Betty-Heimann-Str. 3, 06120 Halle, Germany
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20
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Li Y, Chen J, Tian L, Shen Z, Amby DB, Liu F, Gao Q, Wang Y. Seedling-Stage Deficit Irrigation with Nitrogen Application in Three-Year Field Study Provides Guidance for Improving Maize Yield, Water and Nitrogen Use Efficiencies. Plants (Basel) 2022; 11:plants11213007. [PMID: 36365460 PMCID: PMC9656380 DOI: 10.3390/plants11213007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 11/01/2022] [Accepted: 11/02/2022] [Indexed: 05/14/2023]
Abstract
Deficit irrigation (DI) was acknowledged as an effective technique to improve water use efficiency (WUE) without significant yield reduction. In this study, a 3-year field experiment was conducted in Northeast China during 2017-2019 to investigate the combined effects of 3-week DI from 3-leaf stage and N fertilization on maize seedling growth and determine the resulting impacts on silking growth and yield formation, N use efficiency (NUE) and WUE. Results showed that seedling-stage DI decreased leaf area and photosynthesis, thus significantly limited shoot and root dry biomass for maize seedling, compared to well-watered (WW) plants. In 2017 and 2019, seedling-stage DI positively improved seedling growth with higher root: shoot ratio and enhanced drought tolerance, under higher initial soil water contents (SWC) with sufficient precipitation before DI. The DI-primed plants showed similar or better performances on reproductive growth, grain yield, WUE and NUE compared to WW plants, even experiencing heavy rainfall or drought stresses around the silking stage. However, the contrasting results were observed in 2018 with negative DI effects on seedling and silking growth and final yield, probably due to less rainfall and lower SWC before DI. In all 3 years, N fertilization had significant compensatory effects on limited seedling growth under DI, and its effect was much less in 2018 than other years due to adverse early climate. The principal component and correlation analysis revealed maize silking growth, grain yield, NUE and WUE were strongly related to the seedling growth as affected by water and N managements under various climatic conditions. In conclusion, a short-term and moderate DI regime-adopted at the seedling stage under higher initial SWC and coupled with an appropriate N fertilization-is beneficial to control redundant vegetative growth while optimizing root development, therefore effectively improving drought tolerance for maize plants and achieving higher grain yield, WUE and NUE.
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Affiliation(s)
- Yuxi Li
- College of Resources and Environmental Sciences, Jilin Agricultural University, Changchun 130118, China
- Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education Jilin Agricultural University, Changchun 130118, China
| | - Jian Chen
- College of Resources and Environmental Sciences, Jilin Agricultural University, Changchun 130118, China
- Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education Jilin Agricultural University, Changchun 130118, China
| | - Longbing Tian
- College of Resources and Environmental Sciences, Jilin Agricultural University, Changchun 130118, China
- Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education Jilin Agricultural University, Changchun 130118, China
| | - Zhaoyin Shen
- College of Resources and Environmental Sciences, Jilin Agricultural University, Changchun 130118, China
- Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education Jilin Agricultural University, Changchun 130118, China
| | - Daniel Buchvaldt Amby
- Department of Plant and Environmental Science, Faculty of Science, University of Copenhagen, Højbakkegaard Alle 13, 2630 Copenhagen, Denmark
- Department of Plant and Environmental Sciences, Section for Organismal Biology, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg, Denmark
| | - Fulai Liu
- Department of Plant and Environmental Science, Faculty of Science, University of Copenhagen, Højbakkegaard Alle 13, 2630 Copenhagen, Denmark
| | - Qiang Gao
- College of Resources and Environmental Sciences, Jilin Agricultural University, Changchun 130118, China
- Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education Jilin Agricultural University, Changchun 130118, China
| | - Yin Wang
- College of Resources and Environmental Sciences, Jilin Agricultural University, Changchun 130118, China
- Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education Jilin Agricultural University, Changchun 130118, China
- Correspondence:
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21
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Jin L, Xiao-lin F, Yin-ling Z, Gang-shun R, Ri-sheng C, Ting-ting D. Effects of irrigation and nitrogen fertilization on mitigating salt-induced Na + toxicity and sustaining sea rice growth. Open Life Sci 2022; 17:1165-1173. [PMID: 36185400 PMCID: PMC9482423 DOI: 10.1515/biol-2022-0492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 08/08/2022] [Accepted: 08/09/2022] [Indexed: 12/05/2022] Open
Abstract
This study investigated the effects of irrigation and nitrogen (N) fertilization on mitigating salt-induced Na+ toxicity and sustaining sea rice growth for perfecting irrigation and fertilization of sea rice. Three irrigation methods (submerged irrigation, intermittent irrigation, and controlled irrigation), three kinds of N fertilizers (urea, controlled release urea, and mixed N fertilizer), and control treatment without NaCl were set up in a pot experiment of sea rice with NaCl stress. The electrical conductivity in root layer soil of treatment with mixed N fertilizer and intermittent irrigation decreased slowly with the growth of rice and was significantly smaller than that of other treatments with NaCl. The Na+ content in sea rice of intermittent irrigation was the least, and that of submerged irrigation was significantly smaller than that of controlled irrigation, but the K+ and Ca2+ contents of three irrigation treatments were opposite to the Na+ content. The Na+ content of treatment with mixed N fertilizer and intermittent irrigation was the lowest, while the K+, Ca2+, and Mg2+ contents of mixed N fertilizer and intermittent irrigation were the highest in treatments with NaCl. The cell membrane permeability and malondialdehyde contents of rice leaves of mixed N fertilizer and intermittent irrigation were significantly smaller than those of other treatments with NaCl. The rice yield of mixed N fertilizer was significantly greater than that of urea and controlled release urea, and that of mixed N fertilizer and intermittent irrigation was increased by 104, 108, 277, 300, and 334% compared with mixed N fertilizer and submerged irrigation, urea and intermittent irrigation, urea and submerged irrigation, controlled release urea and intermittent irrigation, and controlled release urea and submerged irrigation, respectively. Therefore, the treatment of mixed N fertilizer and intermittent irrigation is worth recommending for being used for planting sea rice on coastal saline-sodic soil.
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Affiliation(s)
- Li Jin
- Guangdong Ocean University, Zhanjiang, Guangdong 524088, China
| | - Fan Xiao-lin
- South China Agricultural University/Environment Friendly Fertilizer Engineering Technology Research Center, Guangzhou, Guangdong 510642, China
| | - Zhu Yin-ling
- Guangdong Ocean University, Zhanjiang, Guangdong 524088, China
| | - Rao Gang-shun
- Guangdong Ocean University, Zhanjiang, Guangdong 524088, China
| | - Chen Ri-sheng
- Guangdong Ocean University, Zhanjiang, Guangdong 524088, China
| | - Duan Ting-ting
- Guangdong Ocean University, Zhanjiang, Guangdong 524088, China
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22
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Xie H, Li X, Tang Y, Pile Knapp LS, Jin S. Multi-nutrient stoichiometry of Chinese hickory (Carya cathayensis) saplings: plant organs vary in their response to nitrogen fertilization. Tree Physiol 2022; 42:1786-1798. [PMID: 35313354 DOI: 10.1093/treephys/tpac030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Accepted: 03/08/2022] [Indexed: 06/14/2023]
Abstract
Nitrogen (N) enrichment from excessive fertilization in managed forests affects biogeochemical cycles on multiple scales, but our knowledge of how N availability shifts multi-nutrient stoichiometries (including macronutrients: N, phosphorus, potassium, calcium, magnesium and micronutrients: manganese, iron and zinc) within and among organs (root, stem and leaf) remains limited. To understand the difference among organs in terms of multi-nutrient stoichiometric homeostasis responding to N fertilization, a six-level N supply experiment was conducted through a hydroponic system to examine stem growth, multi-nutrient concentrations and stoichiometric ratios in roots, stems and leaves of 2-year-old Chinese hickory (Carya cathayensis Sarg.) saplings. Results showed that N supply significantly enhanced leaf length, width, basal diameter and sapling height. Increasing the rates of N also significantly altered multi-nutrient concentrations in roots, stems and leaves. Macronutrients generally respond more positively than micronutrients within organs. Among organs, leaves and stems generally responded more actively to N supply than roots. The stoichiometric ratios of nutrients within different organs changed significantly with N supply, but their direction and degree of change varied by organ. Specifically, increased N supply reduced the ratios of both macronutrients and micronutrients to N in plant organs, while increased N supply elevated the ratios of P to other nutrients. With N fertilization, ratios of micronutrients decreased in leaves and stems and increased in roots. In particular, leaf N and stem Mn stoichiometries responded strongly to N availability, indicating stimulated N uptake but a decreased risk of Mn2+ accumulation to excessive N. Overall, Chinese hickory saplings responded positively to increasing N availability in terms of stem growth, but the multi-nutrient stoichiometric homeostasis was distinctively organ-dependent. These results are expected to enhance our understanding of N-induced changes in homeostasis of multiple nutrients at the organ level and may offer new insights into how plants adapt to increasing N fertilization.
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Affiliation(s)
- Hongtao Xie
- Jiyang College, Zhejiang A&F University, Zhuji 311800, China
| | - Xueqin Li
- Jiyang College, Zhejiang A&F University, Zhuji 311800, China
| | - Yu Tang
- Jiyang College, Zhejiang A&F University, Zhuji 311800, China
| | - Lauren S Pile Knapp
- USDA Forest Service, Northern Research Station, 202 ABNR Building, University of Missouri-Columbia, Columbia, MO 65211, USA
| | - Songheng Jin
- Jiyang College, Zhejiang A&F University, Zhuji 311800, China
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23
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Stawoska I, Waga J, Wesełucha-Birczyńska A, Dziurka M, Podolska G, Aleksandrowicz E, Skoczowski A. Does Nitrogen Fertilization Affect the Secondary Structures of Gliadin Proteins in Hypoallergenic Wheat? Molecules 2022; 27:5684. [PMID: 36080452 DOI: 10.3390/molecules27175684] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 08/30/2022] [Accepted: 08/31/2022] [Indexed: 11/17/2022]
Abstract
One of the macronutrients indispensable for plant growth and development is nitrogen (N). It is responsible for starch and storage protein (gliadins and glutenins) biosynthesis and, in consequence, influences kernels’ quality and yields. However, applying N-fertilizers increases gluten content in wheat, and it may intensify the risk of developing allergy symptoms in gluten-sensitive individuals. The purpose of our research was to analyse whether and how the elimination of N-fertilizers during the cultivation of wasko.gl− wheat (modified genotype lacking ω-gliadins) changes the secondary structures of gliadin proteins. To this aim, using the FT-Raman technique, we examined flour and gliadin protein extracts obtained from kernels of two winter wheat lines: wasko.gl+ (with a full set of gliadin proteins) and wasko.gl− (without ω-gliadin fraction) cultivated on two different N-fertilization levels—0 and 120 kg N·ha−1. On the basis of the obtained results, we proved that nitrogen fertilization does not have a major impact on the stability of the secondary structures of gliadin proteins for wasko.gl− wheat line with reduced allergenic properties. Furthermore, the results presented herein suggest the possibility of increasing the stability of glutenin structures as a result of the N-fertilization of wasko.gl− wheat line, which gives hope for its use in the production of wheat articles devoted to people suffering from diseases related to gluten sensitivity.
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24
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Hęś M, Golcz A, Gramza-Michałowska A, Jędrusek-Golińska A, Dziedzic K, Mildner-Szkudlarz S. Influence of Nitrogen Fertilizer on the Antioxidative Potential of Basil Varieties ( Ocimum basilicum L.). Molecules 2022; 27:molecules27175636. [PMID: 36080403 PMCID: PMC9458189 DOI: 10.3390/molecules27175636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 08/24/2022] [Accepted: 08/29/2022] [Indexed: 11/16/2022] Open
Abstract
Total phenolic content (TPC) in extracts of basil depended on the cultivar and type of fertilization used in cultivation. TPC was determined spectrophotometrically with the Folin−Ciocalteu reagent. The antioxidant activity of extracts was analyzed by scavenging of DPPH and ABTS radicals, on the basis of metal chelating ability (MetChel) and ferric reducing antioxidant power (FRAP). The greatest TPC was determined in the purple cultivars—141.35 and 165.44 mg gallic acid/g d.m. for fertilized with ammonium nitrate (NH4NO3) and ammonium sulfate ((NH4)2SO4), respectively. Their extracts had the greatest antioxidant capacity in the majority of the methods used. The results varied depending on the modelling system used. The amount of polyphenols in individual basil cultivars differed significantly (p < 0.05) depending on the fertilization used in the culture. Regarding TPC, DPPH, ABTS, FRAP, and MetChel variables, we observed a significant effect for the applied cultivation. In the case of MetChel factor, lower results of all investigated basil species were observed for cultivation with ammonium sulfate. PCA demonstrated in the present study shows that Sweet and Cinnamon Basil samples cultivated with ammonium nitrate create a separated group. We recommend cultivation with ammonium sulfate fertilizers for these varieties of basil. The high content of phenolic compounds demonstrated in Sweet and Cinnamon Basil cultivated with ammonium sulfate, and thus associated antioxidant activity, indicates that it can constitute a valuable source for bioactive compounds in a balanced diet.
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Affiliation(s)
- Marzanna Hęś
- Faculty of Food Science and Nutrition, Poznań University of Life Sciences, Wojska Polskiego 31, 60-624 Poznań, Poland
| | - Anna Golcz
- Faculty of Horticulture and Landscape Architecture, Poznań University of Life Sciences, Zgorzelecka 4, 60-198 Poznań, Poland
| | - Anna Gramza-Michałowska
- Faculty of Food Science and Nutrition, Poznań University of Life Sciences, Wojska Polskiego 31, 60-624 Poznań, Poland
| | - Anna Jędrusek-Golińska
- Faculty of Food Science and Nutrition, Poznań University of Life Sciences, Wojska Polskiego 31, 60-624 Poznań, Poland
| | - Krzysztof Dziedzic
- Faculty of Food Science and Nutrition, Poznań University of Life Sciences, Wojska Polskiego 31, 60-624 Poznań, Poland
- Correspondence:
| | - Sylwia Mildner-Szkudlarz
- Faculty of Food Science and Nutrition, Poznań University of Life Sciences, Wojska Polskiego 31, 60-624 Poznań, Poland
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25
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Xia D, Wang Y, Shi Q, Wu B, Yu X, Zhang C, Li Y, Fu P, Li M, Zhang Q, Liu Q, Gao G, Zhou H, He Y. Effects of Wx Genotype, Nitrogen Fertilization, and Temperature on Rice Grain Quality. Front Plant Sci 2022; 13:901541. [PMID: 35937336 PMCID: PMC9355397 DOI: 10.3389/fpls.2022.901541] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 06/17/2022] [Indexed: 06/15/2023]
Abstract
Quality is a complex trait that is not only the key determinant of the market value of the rice grain, but is also a major constraint in rice breeding. It is influenced by both genetic and environmental factors. However, the combined effects of genotypes and environmental factors on rice grain quality remain unclear. In this study, we used a three-factor experimental design to examine the grain quality of different Wx genotypes grown under different nitrogen fertilization and temperature conditions during grain development. We found that the three factors contributed differently to taste, appearance, and nutritional quality. Increased Wx function and nitrogen fertilization significantly reduced eating quality, whereas high temperature (HT) had almost no effect. The main effects of temperature on appearance quality and moderate Wx function at low temperatures (LTs) contributed to better appearance, and higher nitrogen fertilization promoted appearance at HTs. With regard to nutritional quality, Wx alleles promoted amylose content (AC) as well as starch-lipids content (SLC); nitrogen fertilization increased storage protein content (PC); and higher temperature increased lipid content but decreased the PC. This study helps to broaden the understanding of the major factors that affect the quality of rice and provides constructive messages for rice quality improvement and the cultivation of high-quality rice varieties.
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Affiliation(s)
- Duo Xia
- National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
| | - Yipei Wang
- National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
| | - Qingyun Shi
- National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
| | - Bian Wu
- National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
| | - Xiaoman Yu
- National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
| | - Changquan Zhang
- Key Laboratory of Plant Functional Genomics of the Ministry of Education, Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, College of Agriculture, Yangzhou University, Yangzhou, China
| | - Yanhua Li
- National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
| | - Pei Fu
- National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
| | - Minqi Li
- National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
| | - Qinglu Zhang
- National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
| | - Qiaoquan Liu
- Key Laboratory of Plant Functional Genomics of the Ministry of Education, Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, College of Agriculture, Yangzhou University, Yangzhou, China
| | - Guanjun Gao
- National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
| | - Hao Zhou
- National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Rice Research Institute, Sichuan Agricultural University, Chengdu, China
| | - Yuqing He
- National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan, China
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26
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Wang Y, Yao Z, Zheng X, Subramaniam L, Butterbach-Bahl K. A synthesis of nitric oxide emissions across global fertilized croplands from crop-specific emission factors. Glob Chang Biol 2022; 28:4395-4408. [PMID: 35403777 DOI: 10.1111/gcb.16193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Accepted: 03/25/2022] [Indexed: 06/14/2023]
Abstract
Nitrogen (N) fertilizer application to agricultural soils results in substantial emissions of nitric oxide (NO), a key substance in tropospheric chemistry involved in climate forcing and air pollution. However, the estimates of global cropland NO emissions remain uncertain due to a lack of information on direct NO emission factors (EFd s) of applied N for various cropping systems at seasonal or annual scales. Here we quantified the crop-specific seasonal and annual-scale NO EFd s through synthesizing 1094 measurements from 125 field-based studies worldwide. The global mean crop-specific seasonal EFd was 0.53%, with the highest for vegetables (0.75%). Among cereal crops, the EFd of maize (0.45%) or wheat (0.47%) was about three times higher than for rice (0.12%). At annual scale, the mean EFd across all cropping systems was 0.58%, with tea plantations having the highest (1.54%). For other cropping systems, the annual-scale EFd s ranged from 0.02% to 1.07%. Besides crop type, also soil organic carbon, total N, and pH as well as N fertilizer type were the main factors explaining the variations of NO EFd s. Based on obtained specific EFd s for each crop type, we estimated that NO emissions due to the use of synthetic fertilizers from global croplands are about 0.42-0.62 Tg N year-1 . Our budgets are relatively lower if compared to estimates derived by the use of IPCC defaults for NO emissions (0.72-1.66 Tg N year-1 ) or reported elsewhere (0.67-1.04 Tg N year-1 ). In our estimates, cash crops (vegetable, tea and orchard), which cover only 9% of the world cropland area, contributed about 31% to total NO emissions from global fertilized croplands. Overall, our meta-analysis provides improved crop-specific NO EFd s reflecting current stage of knowledge. The work also highlights the relative importance of cash crop production as sources for atmospheric NO, that is, agricultural systems on which mitigation efforts may focus.
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Affiliation(s)
- Yan Wang
- State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, PR China
- College of Earth and Planetary Science, University of Chinese Academy of Sciences, Beijing, PR China
| | - Zhisheng Yao
- State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, PR China
| | - Xunhua Zheng
- State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, PR China
- College of Earth and Planetary Science, University of Chinese Academy of Sciences, Beijing, PR China
| | - Logapragasan Subramaniam
- Institute for Meteorology and Climate Research, Atmospheric Environmental Research, Karlsruhe Institute of Technology, Garmisch-Partenkirchen, Germany
| | - Klaus Butterbach-Bahl
- State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, PR China
- Institute for Meteorology and Climate Research, Atmospheric Environmental Research, Karlsruhe Institute of Technology, Garmisch-Partenkirchen, Germany
- Land-CRAFT, Department of Agroecology, Aarhus University, Tjele, Denmark
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27
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Losacco D, Tumolo M, Cotugno P, Leone N, Massarelli C, Convertini S, Tursi A, Uricchio VF, Ancona V. Use of Biochar to Improve the Sustainable Crop Production of Cauliflower ( Brassica oleracea L.). Plants (Basel) 2022; 11:1182. [PMID: 35567183 PMCID: PMC9103171 DOI: 10.3390/plants11091182] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 04/14/2022] [Accepted: 04/23/2022] [Indexed: 06/15/2023]
Abstract
In agriculture, biochar (B) application has been suggested as a green technology to reduce nitrate pollution from agricultural origins and improve crop yield. The agronomic impact of B use on soil has been extensively studied, while knowledge of its possible effects on horticultural cultivation is still scarce. A greenhouse experiment was conducted to evaluate the effect of using biochar in soils treated with two different rates of nitrogen fertilizers on soil properties and nitrogen (N) leachate. This study also investigated the vegetative parameters during the crop growing season of Brassica oleracea L. var. botrytis. Soil mesocosms were set up to test the following treatments: untreated/control (C); normal dose of N fertilizer (130 kg N ha-1) (ND); ND+B; high dose of N fertilizer (260 kg N ha-1) (HD); and HD+B. Principal component analysis and cluster analysis were exploited to assess biochar's ability to reduce nitrate leaching and enhance soil-vegetative properties. Biochar addition affected the soil chemical properties of the fertilized microcosms (ND and HD). Biochar increased the NH4+ content in HD soil and the NO3- content in ND soil by 26 mg/L and 48.76 mg/L, respectively. The results showed that biochar application increased the marketable cauliflower yield. In ND+B and HD+B, the curd weight was 880.68 kg and 1097.60 kg, respectively. In addition, a small number of nitrogenous compounds in the leachate were quantified in experimental lines with the biochar. Therefore, biochar use improves the marketable yield of horticulture, mitigating the negative impacts associated with the mass use of N fertilizers in agriculture.
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Affiliation(s)
- Daniela Losacco
- Water Research Institute-Italian National Research Council (IRSA-CNR), 70132 Bari, BA, Italy; (M.T.); (N.L.); (C.M.); (V.F.U.)
- Department of Biology, University of Bari, 70126 Bari, BA, Italy; (P.C.); (A.T.)
| | - Marina Tumolo
- Water Research Institute-Italian National Research Council (IRSA-CNR), 70132 Bari, BA, Italy; (M.T.); (N.L.); (C.M.); (V.F.U.)
- Department of Biology, University of Bari, 70126 Bari, BA, Italy; (P.C.); (A.T.)
| | - Pietro Cotugno
- Department of Biology, University of Bari, 70126 Bari, BA, Italy; (P.C.); (A.T.)
| | - Natalia Leone
- Water Research Institute-Italian National Research Council (IRSA-CNR), 70132 Bari, BA, Italy; (M.T.); (N.L.); (C.M.); (V.F.U.)
| | - Carmine Massarelli
- Water Research Institute-Italian National Research Council (IRSA-CNR), 70132 Bari, BA, Italy; (M.T.); (N.L.); (C.M.); (V.F.U.)
| | | | - Angelo Tursi
- Department of Biology, University of Bari, 70126 Bari, BA, Italy; (P.C.); (A.T.)
| | - Vito Felice Uricchio
- Water Research Institute-Italian National Research Council (IRSA-CNR), 70132 Bari, BA, Italy; (M.T.); (N.L.); (C.M.); (V.F.U.)
| | - Valeria Ancona
- Water Research Institute-Italian National Research Council (IRSA-CNR), 70132 Bari, BA, Italy; (M.T.); (N.L.); (C.M.); (V.F.U.)
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28
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Yang L, Muhammad I, Chi YX, Wang D, Zhou XB. Straw Return and Nitrogen Fertilization to Maize Regulate Soil Properties, Microbial Community, and Enzyme Activities Under a Dual Cropping System. Front Microbiol 2022; 13:823963. [PMID: 35369510 PMCID: PMC8965350 DOI: 10.3389/fmicb.2022.823963] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Accepted: 01/18/2022] [Indexed: 11/13/2022] Open
Abstract
Soil sustainability is based on soil microbial communities’ abundance and composition. Straw returning (SR) and nitrogen (N) fertilization influence soil fertility, enzyme activities, and the soil microbial community and structure. However, it remains unclear due to heterogeneous composition and varying decomposition rates of added straw. Therefore, the current study aimed to determine the effect of SR and N fertilizer application on soil organic carbon (SOC), total nitrogen (TN), urease (S-UE) activity, sucrase (S-SC) activity, cellulose (S-CL) activity, and bacterial, fungal, and nematode community composition from March to December 2020 at Guangxi University, China. Treatments included two planting patterns, that is, SR and traditional planting (TP) and six N fertilizer with 0, 100, 150, 200, 250, and 300 kg N ha–1. Straw returning significantly increased soil fertility, enzymatic activities, community diversity, and composition of bacterial and fungal communities compared to TP. Nitrogen fertilizer application increased soil fertility and enzymes and decreased the richness of bacterial and fungal communities. In SR added plots, the dominated bacterial phyla were Proteobacteria, Acidobacterioia, Nitrospirae, Chloroflexi, and Actinobacteriota; whereas fungal phyla were Ascomycota and Mortierellomycota and nematode genera were Pratylenchus and Acrobeloides. Co-occurrence network and redundancy analysis (RDA) showed that TN, SOC, and S-SC were closely correlated with bacterial community composition. It was concluded that the continuous SR and N fertilizer improved soil fertility and improved soil bacterial, fungal, and nematode community composition.
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Affiliation(s)
- Li Yang
- Guangxi Colleges and Universities Key Laboratory of Crop Cultivation and Tillage, Agricultural College, Guangxi University, Nanning, China
| | - Ihsan Muhammad
- Guangxi Colleges and Universities Key Laboratory of Crop Cultivation and Tillage, Agricultural College, Guangxi University, Nanning, China
| | - Yu Xin Chi
- Guangxi Colleges and Universities Key Laboratory of Crop Cultivation and Tillage, Agricultural College, Guangxi University, Nanning, China.,The Key Laboratory of Germplasm Improvement and Cultivation in Cold Regions, College of Agronomy, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Dan Wang
- College of Horticulture and Landscape, Tianjin Agricultural University, Tianjin, China
| | - Xun Bo Zhou
- Guangxi Colleges and Universities Key Laboratory of Crop Cultivation and Tillage, Agricultural College, Guangxi University, Nanning, China
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29
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Nie J, Zhou J, Zhao J, Wang X, Liu K, Wang P, Wang S, Yang L, Zang H, Harrison MT, Yang Y, Zeng Z. Soybean Crops Penalize Subsequent Wheat Yield During Drought in the North China Plain. Front Plant Sci 2022; 13:947132. [PMID: 35837461 PMCID: PMC9274277 DOI: 10.3389/fpls.2022.947132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 06/06/2022] [Indexed: 05/09/2023]
Abstract
Contemporary wisdom suggests that inclusion of legumes into crop rotations benefit subsequent cereal crop yields. To investigate whether this maxim was generically scalable, we contrast summer soybean-winter wheat (SW) with summer maize-winter wheat (MW) rotation systems in an extensive field campaign in the North China Plain (NCP). We identify heretofore unseen interactions between crop rotation, synthetic N fertilizer application, and stored soil water. In the year with typical rainfall, inclusion of soybean within rotation had no effect on wheat ear number and yield, while N fertilization penalized wheat yields by 6-8%, mainly due to lower dry matter accumulation after anthesis. In contrast, in dry years prior crops of soybean reduced the rate and number of effective ears in wheat by 5-27 and 14-17%, respectively, leading to 7-23% reduction in wheat yield. Although N fertilization increased the stem number before anthesis in dry years, there was no corresponding increase in ear number and yield of wheat in such years, indicating compensating reduction in yield components. We also showed that N fertilization increased wheat yield in MW rather than SW as the former better facilitated higher dry matter accumulation after flowering in dry years. Taken together, our results suggest that soybean inclusion reduced soil available water for subsequent wheat growth, causing yield penalty of subsequent wheat under drought conditions. We call for more research into factors influencing crop soil water, including initial state, crop water requirement, and seasonal climate forecasts, when considering legumes into rotation systems. Graphical AbstractResponse of wheat population and yield to soybean inclusion under limited-irrigation.
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Affiliation(s)
- Jiangwen Nie
- College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
| | - Jie Zhou
- College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
| | - Jie Zhao
- College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
| | - Xiquan Wang
- College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Ke Liu
- Tasmanian Institute of Agriculture, University of Tasmania, Launceston, TAS, Australia
| | - Peixin Wang
- College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
| | - Shang Wang
- College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
- Department of Soil and Plant Microbiome, Institute of Phytopathology, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - Lei Yang
- College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
| | - Huadong Zang
- College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
| | - Matthew Tom Harrison
- Tasmanian Institute of Agriculture, University of Tasmania, Launceston, TAS, Australia
| | - Yadong Yang
- College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
- *Correspondence: Yadong Yang,
| | - Zhaohai Zeng
- College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
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30
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Wen A, Havens KL, Bloch SE, Shah N, Higgins DA, Davis-Richardson AG, Sharon J, Rezaei F, Mohiti-Asli M, Johnson A, Abud G, Ane JM, Maeda J, Infante V, Gottlieb SS, Lorigan JG, Williams L, Horton A, McKellar M, Soriano D, Caron Z, Elzinga H, Graham A, Clark R, Mak SM, Stupin L, Robinson A, Hubbard N, Broglie R, Tamsir A, Temme K. Enabling Biological Nitrogen Fixation for Cereal Crops in Fertilized Fields. ACS Synth Biol 2021; 10:3264-3277. [PMID: 34851109 DOI: 10.1021/acssynbio.1c00049] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Agricultural productivity relies on synthetic nitrogen fertilizers, yet half of that reactive nitrogen is lost to the environment. There is an urgent need for alternative nitrogen solutions to reduce the water pollution, ozone depletion, atmospheric particulate formation, and global greenhouse gas emissions associated with synthetic nitrogen fertilizer use. One such solution is biological nitrogen fixation (BNF), a component of the complex natural nitrogen cycle. BNF application to commercial agriculture is currently limited by fertilizer use and plant type. This paper describes the identification, development, and deployment of the first microbial product optimized using synthetic biology tools to enable BNF for corn (Zea mays) in fertilized fields, demonstrating the successful, safe commercialization of root-associated diazotrophs and realizing the potential of BNF to replace and reduce synthetic nitrogen fertilizer use in production agriculture. Derived from a wild nitrogen-fixing microbe isolated from agricultural soils, Klebsiella variicola 137-1036 ("Kv137-1036") retains the capacity of the parent strain to colonize corn roots while increasing nitrogen fixation activity 122-fold in nitrogen-rich environments. This technical milestone was then commercialized in less than half of the time of a traditional biological product, with robust biosafety evaluations and product formulations contributing to consumer confidence and ease of use. Tested in multi-year, multi-site field trial experiments throughout the U.S. Corn Belt, fields grown with Kv137-1036 exhibited both higher yields (0.35 ± 0.092 t/ha ± SE or 5.2 ± 1.4 bushels/acre ± SE) and reduced within-field yield variance by 25% in 2018 and 8% in 2019 compared to fields fertilized with synthetic nitrogen fertilizers alone. These results demonstrate the capacity of a broad-acre BNF product to fix nitrogen for corn in field conditions with reliable agronomic benefits.
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Affiliation(s)
- Amy Wen
- Pivot Bio, Berkeley, California 94710, United States
| | | | - Sarah E. Bloch
- Morrison & Foerster LLP, San Francisco, California 94105, United States
| | - Neal Shah
- Pivot Bio, Berkeley, California 94710, United States
| | | | | | - Judee Sharon
- University of Minnesota─Twin Cities, Minneapolis, Minnesota 55401, United States
| | | | | | | | - Gabriel Abud
- Tempo Automation, San Francisco, California 94103, United States
| | - Jean-Michel Ane
- University of Minnesota─Twin Cities, Minneapolis, Minnesota 55401, United States
| | - Junko Maeda
- University of Wisconsin−Madison, Madison, Wisconsin 53706, United States
| | - Valentina Infante
- University of Wisconsin−Madison, Madison, Wisconsin 53706, United States
| | | | | | | | - Alana Horton
- Pivot Bio, Berkeley, California 94710, United States
| | | | | | - Zoe Caron
- Pivot Bio, Berkeley, California 94710, United States
| | | | - Ashley Graham
- Olema Oncology, San Francisco, California 94107, United States
| | | | - San-Ming Mak
- Pivot Bio, Berkeley, California 94710, United States
| | - Laura Stupin
- Pivot Bio, Berkeley, California 94710, United States
| | | | | | | | - Alvin Tamsir
- Pivot Bio, Berkeley, California 94710, United States
| | - Karsten Temme
- Pivot Bio, Berkeley, California 94710, United States
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31
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Dong H, Fan S, Sun H, Chen C, Wang A, Jiang L, Ma D. Rhizosphere-Associated Microbiomes of Rice ( Oryza sativa L.) Under the Effect of Increased Nitrogen Fertilization. Front Microbiol 2021; 12:730506. [PMID: 34621256 PMCID: PMC8490883 DOI: 10.3389/fmicb.2021.730506] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Accepted: 09/01/2021] [Indexed: 11/13/2022] Open
Abstract
Crops assemble and rely on rhizosphere-associated microbiomes for plant nutrition, which is crucial to their productivity. Historically, excessive nitrogen fertilization did not result in continuously increasing yields but rather caused environmental issues. A comprehensive understanding should be developed regarding the ways in which crops shape rhizosphere-associated microbiomes under conditions of increased nitrogen fertilization. In this study, we applied 16S and 18S ribosomal RNA gene profiling to characterize bacterial and fungal communities in bulk and rhizosphere soil of rice subjected to three levels of nitrogen fertilization for 5 years. Soil biochemical properties were characterized, and carbon-, nitrogen-, and phosphorus-related soil enzyme activities were investigated, by assays. Increasing nitrogen fertilization led to a decreasing trend in the variation of microbial community structures and demonstrated a more definite influence on fungal rather than bacterial community compositions and functions. Changes in the level of nitrogen fertilization significantly affected chemical properties such as soil pH, nutrient content, and microbial biomass levels in both rhizosphere and bulk soil. Soil enzyme activity levels varied substantially across nitrogen fertilization intensities and correlated more with the fungal than with the bacterial community. Our results indicated that increased nitrogen input drives alterations in the structures and functions of microbial communities, properties of soil carbon, nitrogen, and phosphorus, as well as enzyme activities. These results provide novel insights into the associations among increased nitrogen input, changes in biochemical properties, and shifts in microbial communities in the rhizosphere of agriculturally intensive ecosystems.
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Affiliation(s)
- Hangyu Dong
- Key Laboratory of Northeast Rice Biology and Breeding, National Rice Regional Technology Innovation Center, Rice Research Institute, Shenyang Agricultural University, Shenyang, China.,College of Agronomy, Shenyang Agricultural University, Shenyang, China
| | - Shuxiu Fan
- College of Agronomy, Shenyang Agricultural University, Shenyang, China
| | - Haoyuan Sun
- Key Laboratory of Northeast Rice Biology and Breeding, National Rice Regional Technology Innovation Center, Rice Research Institute, Shenyang Agricultural University, Shenyang, China.,College of Agronomy, Shenyang Agricultural University, Shenyang, China
| | - Conglin Chen
- Key Laboratory of Northeast Rice Biology and Breeding, National Rice Regional Technology Innovation Center, Rice Research Institute, Shenyang Agricultural University, Shenyang, China.,College of Agronomy, Shenyang Agricultural University, Shenyang, China
| | - Aixin Wang
- Key Laboratory of Northeast Rice Biology and Breeding, National Rice Regional Technology Innovation Center, Rice Research Institute, Shenyang Agricultural University, Shenyang, China.,College of Agronomy, Shenyang Agricultural University, Shenyang, China
| | - Linlin Jiang
- Key Laboratory of Northeast Rice Biology and Breeding, National Rice Regional Technology Innovation Center, Rice Research Institute, Shenyang Agricultural University, Shenyang, China.,College of Agronomy, Shenyang Agricultural University, Shenyang, China
| | - Dianrong Ma
- Key Laboratory of Northeast Rice Biology and Breeding, National Rice Regional Technology Innovation Center, Rice Research Institute, Shenyang Agricultural University, Shenyang, China.,College of Agronomy, Shenyang Agricultural University, Shenyang, China
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32
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Brigham LM, Bueno de Mesquita CP, Smith JG, Sartwell SA, Schmidt SK, Suding KN. Do plant-soil interactions influence how the microbial community responds to environmental change? Ecology 2021; 103:e03554. [PMID: 34622953 DOI: 10.1002/ecy.3554] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 05/03/2021] [Accepted: 07/15/2021] [Indexed: 01/04/2023]
Abstract
Global change alters ecosystems and their functioning, and biotic interactions can either buffer or amplify such changes. We utilized a long-term nitrogen (N) addition and species removal experiment in the Front Range of Colorado, USA to determine whether a codominant forb and a codominant grass, with different effects on nutrient cycling and plant community structure, would buffer or amplify the effects of simulated N deposition on soil bacterial and fungal communities. While the plant community was strongly shaped by both the presence of dominant species and N addition, we did not find a mediating effect of the plant community on soil microbial response to N. In contrast to our hypothesis, we found a decoupling of the plant and microbial communities such that the soil microbial community shifted under N independently of directional shifts in the plant community. These findings suggest there are not strong cascading effects of N deposition across the plant-soil interface in our system.
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Affiliation(s)
- Laurel M Brigham
- Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, Colorado, 80309, USA.,Institute of Arctic and Alpine Research, University of Colorado, Boulder, Colorado, 80301, USA
| | - Clifton P Bueno de Mesquita
- Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, Colorado, 80309, USA.,Institute of Arctic and Alpine Research, University of Colorado, Boulder, Colorado, 80301, USA
| | - Jane G Smith
- Institute of Arctic and Alpine Research, University of Colorado, Boulder, Colorado, 80301, USA
| | - Samuel A Sartwell
- Institute of Arctic and Alpine Research, University of Colorado, Boulder, Colorado, 80301, USA
| | - Steven K Schmidt
- Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, Colorado, 80309, USA
| | - Katharine N Suding
- Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, Colorado, 80309, USA.,Institute of Arctic and Alpine Research, University of Colorado, Boulder, Colorado, 80301, USA
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33
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Zhang Q, Feng YX, Lin YJ, Yu XZ. Indigenous Proline is a Two-Dimensional Safety-Relief Valve in Balancing Specific Amino Acids in Rice under Hexavalent Chromium Stress. J Agric Food Chem 2021; 69:11185-11195. [PMID: 34521195 DOI: 10.1021/acs.jafc.1c02575] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
This study highlights the roles of different N sources (N starvation [-N], nitrate [+NO3-], and ammonium [+NH4+]) in specific amino acids involved in rice proline (Pro) metabolism under hexavalent chromium [Cr(VI)] stress. In treatment with Cr(VI) - N, the content of glutamate (Glu) in shoots was comparable to that of Pro, while the content of Glu in the roots was significantly higher than that of Pro. In case of treatment with Cr(VI) + NO3-/NH4+, the content of Glu in both tissues was significantly higher than that of Pro, suggesting that the synthesis of γ-aminobutyric acid and glutathione was most likely involved. Pro synthesis in rice is mainly derived from the Glu pathway rather than the ornithine (Orn) pathway, which is strongly affected by different N sources. The genetic regulation network of Pro metabolism demonstrated a good signal for describing amino acid balance in rice under Cr(VI) stress.
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Affiliation(s)
- Qing Zhang
- College of Environmental Science & Engineering, Guilin University of Technology, Guilin 541004, People's Republic of China
| | - Yu-Xi Feng
- College of Environmental Science & Engineering, Guilin University of Technology, Guilin 541004, People's Republic of China
| | - Yu-Juan Lin
- College of Environmental Science & Engineering, Guilin University of Technology, Guilin 541004, People's Republic of China
| | - Xiao-Zhang Yu
- College of Environmental Science & Engineering, Guilin University of Technology, Guilin 541004, People's Republic of China
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34
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Kazanski CE, Cowles J, Dymond S, Clark AT, David AS, Jungers JM, Kendig AE, Riggs CE, Trost J, Wei X. Water availability modifies productivity response to biodiversity and nitrogen in long-term grassland experiments. Ecol Appl 2021; 31:e02363. [PMID: 33899307 DOI: 10.1002/eap.2363] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 12/15/2020] [Accepted: 01/14/2021] [Indexed: 06/12/2023]
Abstract
Diversity and nitrogen addition have positive relationships with plant productivity, yet climate-induced changes in water availability threaten to upend these established relationships. Using long-term data from three experiments in a mesic grassland (ranging from 17 to 34 yr of data), we tested how the effects of species richness and nitrogen addition on community-level plant productivity changed as a function of annual fluctuations in water availability using growing season precipitation and the Standardized Precipitation-Evapotranspiration Index (SPEI). While results varied across experiments, our findings demonstrate that water availability can magnify the positive effects of both biodiversity and nitrogen addition on productivity. These results suggest that productivity responses to anthropogenic species diversity loss and increasing nitrogen deposition could depend on precipitation regimes, highlighting the importance of testing interactions between multiple global change drivers.
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Affiliation(s)
- Clare E Kazanski
- Department of Ecology, Evolution, and Behavior, University of Minnesota, 1479 Gortner Avenue, St. Paul, Minnesota, 55108, USA
- The Nature Conservancy, 1101 West River Parkway, Minneapolis, Minnesota, 55415, USA
| | - Jane Cowles
- Department of Ecology, Evolution, and Behavior, University of Minnesota, 1479 Gortner Avenue, St. Paul, Minnesota, 55108, USA
| | - Salli Dymond
- Departments of Forestry Resources, University of Minnesota, St. Paul, Minnesota, 55108, USA
- Department of Earth and Environmental Sciences, University of Minnesota-Duluth, 1114 Kirby Drive, Duluth, Minnesota, 55812, USA
| | - Adam T Clark
- Institute for Biology, Karl-Franzens University of Graz, Holteigasse 6, Graz, 8010, Austria
| | - Aaron S David
- Department of Ecology, Evolution, and Behavior, University of Minnesota, 1479 Gortner Avenue, St. Paul, Minnesota, 55108, USA
| | - Jacob M Jungers
- Department of Agronomy and Plant Genetics, University of Minnesota, 1991 Upper Buford Circle, St. Paul, Minnesota, 55108, USA
| | - Amy E Kendig
- Department of Ecology, Evolution, and Behavior, University of Minnesota, 1479 Gortner Avenue, St. Paul, Minnesota, 55108, USA
| | - Charlotte E Riggs
- Department of Ecology, Evolution, and Behavior, University of Minnesota, 1479 Gortner Avenue, St. Paul, Minnesota, 55108, USA
| | - Jared Trost
- Department of Ecology, Evolution, and Behavior, University of Minnesota, 1479 Gortner Avenue, St. Paul, Minnesota, 55108, USA
- Departments of Forestry Resources, University of Minnesota, St. Paul, Minnesota, 55108, USA
| | - Xiaojing Wei
- Department of Ecology, Evolution, and Behavior, University of Minnesota, 1479 Gortner Avenue, St. Paul, Minnesota, 55108, USA
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35
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Elias JD, Agrawal AA. A private channel of nitrogen alleviates interspecific competition for an annual legume. Ecology 2021; 102:e03449. [PMID: 34166532 DOI: 10.1002/ecy.3449] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 04/29/2021] [Accepted: 05/14/2021] [Indexed: 11/08/2022]
Abstract
The way resource availability predictably alters interspecific interactions and may favor one resource-acquisition strategy over another is critical for understanding context dependency. The ubiquity of nitrogen (N) limitation across terrestrial environments is a driver of plant competition and the association of some plants with N-fixing bacteria (rhizobia) may alleviate competition with nonfixing plants. Conversely, when available soil N is elevated, competitive advantages imparted by rhizobia are hypothesized to decline because nonfixing species are able to acquire those nutrients readily. We manipulated competition, soil N, and soil microbial inoculation, employing the ground bean Amphicarpaea bracteata, a native annual N-fixing legume, and jewelweed Impatiens capensis, a native co-occurring nonfixing annual. We found that legume performance was negatively impacted by interspecific competition, but less so under lower soil N in both the greenhouse and field. The legume invested a greater proportion of resources in rhizobia when competing, but only under low N. Also consistent with predictions, a competition-by-microbial-inoculation interaction demonstrated that negative effects of competition were alleviated by rhizobia. Finally, we detected an interaction between inoculation and fertilization, whereby N addition resulted in increased performance for uninoculated legumes, but a small decline in performance for inoculated plants, the latter likely representing a cost of mutualism. Thus, several lines of evidence point to the legume-rhizobia mutualism being more beneficial under competition and limited soil N. Competing I. capensis, in contrast, benefited from N addition regardless of the addition of soil microbes. In a survey of natural populations, legume and rhizobia growth were positively correlated at population edges (where interspecific competition is expected to be higher, the mutualism is stronger), whereas at population centers we found no association. Isotopic evidence confirmed a higher degree of rhizobial N-fixation at population edges compared to centers. Taken together, our results demonstrate an important role for the largely private channel of nitrogen in legume competitive performance, but with the benefits imparted by rhizobia being predictably weaker at higher soil fertility. We speculate that alleviation of competitive impacts through resource partitioning is an important and yet largely overlooked aspect of the evolutionary ecology of legume-rhizobia interactions.
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Affiliation(s)
- J D Elias
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, New York, 14853, USA
| | - A A Agrawal
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, New York, 14853, USA
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36
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Hu J, Richwine JD, Keyser PD, Li L, Yao F, Jagadamma S, DeBruyn JM. Nitrogen Fertilization and Native C 4 Grass Species Alter Abundance, Activity, and Diversity of Soil Diazotrophic Communities. Front Microbiol 2021; 12:675693. [PMID: 34305840 PMCID: PMC8297707 DOI: 10.3389/fmicb.2021.675693] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Accepted: 06/14/2021] [Indexed: 01/31/2023] Open
Abstract
Native C4 grasses have become the preferred species for native perennial pastures and bioenergy production due to their high productivity under low soil nitrogen (N) status. One reason for their low N requirement is that C4 grasses may benefit from soil diazotrophs and promote biological N fixation. Our objective was to evaluate the impact of N fertilization rates (0, 67, and 202 kg N ha-1) and grass species (switchgrass [Panicum virgatum] and big bluestem [Andropogon gerardii]) on the abundance, activity, diversity, and community composition of soil diazotrophs over three agricultural seasons (grass green-up, initial harvest, and second harvest) in a field experiment in East Tennessee, United States. Nitrogen fertilization rate had a stronger influence on diazotroph population size and activity (determined by nifH gene and transcript abundances) and community composition (determined by nifH gene amplicon sequencing) than agricultural season or grass species. Excessive fertilization (202 kg N ha-1) resulted in fewer nifH transcripts compared to moderate fertilization (67 kg N ha-1) and decreased both richness and evenness of diazotrophic community, reflecting an inhibitory effect of high N application rates on soil diazotrophic community. Overall, cluster I and cluster III diazotrophs were dominant in this native C4 grass system. Diazotroph population size and activity were directly related to soil water content (SWC) based on structural equation modeling. Soil pH, SWC, and C and N availability were related to the variability of diazotrophic community composition. Our results revealed relationships between soil diazotrophic community and associated soil properties, adding to our understanding of the response of soil diazotrophs to N fertilization and grass species in native C4 grass systems.
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Affiliation(s)
- Jialin Hu
- Department of Biosystems Engineering and Soil Science, University of Tennessee, Knoxville, Knoxville, TN, United States
| | - Jonathan D. Richwine
- Department of Forestry, Wildlife and Fisheries, University of Tennessee, Knoxville, TN, United States
| | - Patrick D. Keyser
- Department of Forestry, Wildlife and Fisheries, University of Tennessee, Knoxville, TN, United States
| | - Lidong Li
- United States Department of Agriculture—Agricultural Research Service, Agroecosystem Management Research Unit, University of Nebraska-Lincoln, Lincoln, NE, United States
| | - Fei Yao
- Department of Biosystems Engineering and Soil Science, University of Tennessee, Knoxville, Knoxville, TN, United States
| | - Sindhu Jagadamma
- Department of Biosystems Engineering and Soil Science, University of Tennessee, Knoxville, Knoxville, TN, United States
| | - Jennifer M. DeBruyn
- Department of Biosystems Engineering and Soil Science, University of Tennessee, Knoxville, Knoxville, TN, United States
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37
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de Lima VJ, Gracia-Romero A, Rezzouk FZ, Diez-Fraile MC, Araus-Gonzalez I, Kamphorst SH, do Amaral Júnior AT, Kefauver SC, Aparicio N, Araus JL. Comparative Performance of High-Yielding European Wheat Cultivars Under Contrasting Mediterranean Conditions. Front Plant Sci 2021; 12:687622. [PMID: 34267771 PMCID: PMC8276830 DOI: 10.3389/fpls.2021.687622] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 05/24/2021] [Indexed: 06/13/2023]
Abstract
Understanding the interaction between genotype performance and the target environment is the key to improving genetic gain, particularly in the context of climate change. Wheat production is seriously compromised in agricultural regions affected by water and heat stress, such as the Mediterranean basin. Moreover, wheat production may be also limited by the nitrogen availability in the soil. We have sought to dissect the agronomic and physiological traits related to the performance of 12 high-yield European bread wheat varieties under Mediterranean rainfed conditions and different levels of N fertilization during two contrasting crop seasons. Grain yield was more than two times higher in the first season than the second season and was associated with much greater rainfall and lower temperatures. However, the nitrogen effect was rather minor. Genotypic effects existed for the two seasons. While several of the varieties from central/northern Europe yielded more than those from southern Europe during the optimal season, the opposite trend occurred in the dry season. The varieties from central/northern Europe were associated with delayed phenology and a longer crop cycle, while the varieties from southern Europe were characterized by a shorter crop cycle but comparatively higher duration of the reproductive period, associated with an earlier beginning of stem elongation and a greater number of ears per area. However, some of the cultivars from northern Europe maintained a relatively high yield capacity in both seasons. Thus, KWS Siskin from the UK exhibited intermediate phenology, resulting in a relatively long reproductive period, together with a high green area throughout the crop cycle.
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Affiliation(s)
- Valter Jário de Lima
- Laboratório de Melhoramento Genético Vegetal, Centro de Ciências e Tecnologias Agropecuárias (CCTA), Universidade Estadual do Norte Fluminense Darcy Ribeiro – UENF, Campos dos Goytacazes, Brazil
| | - Adrian Gracia-Romero
- Integrative Crop Ecophysiology Group, Plant Physiology Section, Faculty of Biology, University of Barcelona, Barcelona, Spain
- AGROTECNIO (Center for Research in Agrotechnology), Lleida, Spain
| | - Fatima Zahra Rezzouk
- Integrative Crop Ecophysiology Group, Plant Physiology Section, Faculty of Biology, University of Barcelona, Barcelona, Spain
- AGROTECNIO (Center for Research in Agrotechnology), Lleida, Spain
| | | | | | - Samuel Henrique Kamphorst
- Laboratório de Melhoramento Genético Vegetal, Centro de Ciências e Tecnologias Agropecuárias (CCTA), Universidade Estadual do Norte Fluminense Darcy Ribeiro – UENF, Campos dos Goytacazes, Brazil
| | - Antonio Teixeira do Amaral Júnior
- Laboratório de Melhoramento Genético Vegetal, Centro de Ciências e Tecnologias Agropecuárias (CCTA), Universidade Estadual do Norte Fluminense Darcy Ribeiro – UENF, Campos dos Goytacazes, Brazil
| | - Shawn C. Kefauver
- Integrative Crop Ecophysiology Group, Plant Physiology Section, Faculty of Biology, University of Barcelona, Barcelona, Spain
- AGROTECNIO (Center for Research in Agrotechnology), Lleida, Spain
| | - Nieves Aparicio
- Agro-Technological Institute of Castilla and Leon (ITACyL), Valladolid, Spain
| | - Jose Luis Araus
- Integrative Crop Ecophysiology Group, Plant Physiology Section, Faculty of Biology, University of Barcelona, Barcelona, Spain
- AGROTECNIO (Center for Research in Agrotechnology), Lleida, Spain
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Osman A, Imbabi TA, El-Hadary A, Sabeq II, Edris SN, Merwad AR, Azab E, Gobouri AA, Mohammadein A, Sitohy M. Health Aspects, Growth Performance, and Meat Quality of Rabbits Receiving Diets Supplemented with Lettuce Fertilized with Whey Protein Hydrolysate Substituting Nitrate. Biomolecules 2021; 11:835. [PMID: 34205142 PMCID: PMC8227087 DOI: 10.3390/biom11060835] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 05/31/2021] [Accepted: 06/01/2021] [Indexed: 02/07/2023] Open
Abstract
Lettuce (Lactuca sativa) was grown using a foliar spray with whey protein hydrolysate (WPH) as opposed to normal nitrate fertilization. Lettuce juice was prepared from lettuce cultivated without any fertilization, nitrate fertilization, or WPH. Sixty weaned, 4-week-old male V-line rabbits with an average 455 ± 6 g body weight were randomly divided into 4 groups (n = 15) and administered different lettuce juices. Rabbits administered WPH-fertilized lettuce showed significantly higher (n = 5, p < 0.05) body weight and carcass weight than those receiving nitrate-fertilized lettuce. Rabbits administered nitrate-fertilized lettuce were associated with significantly (p < 0.05) higher levels of liver enzyme activities (AST, ALT, and ALP), bilirubin (total, direct, and indirect), and kidney biomarkers (creatinine, urea, and uric acid). Rabbits administered WPH-fertilized lettuce avoided such increases and exhibited normal levels of serum proteins. Rabbits administered nitrate-fertilized lettuce manifested significantly (p < 0.05) lower RBCs and Hb levels than that of the other groups, while those receiving WPH-fertilized lettuce showed the highest levels. Liver and kidney sections of rabbits receiving WPH-fertilized lettuce witnessed the absence of the histopathological changes induced by feeding on nitrate-fertilized lettuce and produced higher quality meat. WPH-lettuce can substitute nitrate-fertilized lettuce in feeding rabbits for better performance and health aspects.
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Affiliation(s)
- Ali Osman
- Department of Biochemistry, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt;
| | - Tharwat A. Imbabi
- Department of Animal Production, Faculty of Agriculture, Benha Univerisity, Benha 13736, Egypt;
| | - Abdalla El-Hadary
- Department of Biochemistry, Faculty of Agriculture, Benha University, Benha 13736, Egypt;
| | - Islam Ibrahim Sabeq
- Department of Food Hygiene, Faculty of Veterinary Medicine, Benha University, Benha 13736, Egypt; (I.I.S.); (S.N.E.)
| | - Shimaa N. Edris
- Department of Food Hygiene, Faculty of Veterinary Medicine, Benha University, Benha 13736, Egypt; (I.I.S.); (S.N.E.)
| | - Abdel-Rahaman Merwad
- Department of Soil Science, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt;
| | - Ehab Azab
- Department of Nutrition and Food Science, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia;
| | - Adil A. Gobouri
- Department of Chemistry, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia;
| | - Amaal Mohammadein
- Department of Biology, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia;
| | - Mahmoud Sitohy
- Department of Biochemistry, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt;
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Ding Z, Alharbi S, Ali EF, Ghoneim AM, Hadi Al Fahd M, Wang G, Eissa MA. Effect of phosphorus-loaded biochar and nitrogen-fertilization on release kinetic of toxic heavy metals and tomato growth. Int J Phytoremediation 2021; 24:156-165. [PMID: 34081869 DOI: 10.1080/15226514.2021.1929825] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
In this study, we investigate the effect of nitrogen fertilizer application rates with and without phosphorus-loaded biochar (BCP) on the productivity of tomato (Solanum lycopersicum cv GS) planted on a contaminated soil based on pot and incubation experiments. The release kinetic of toxic metals as affected by BCP was also investigated. BCP at rate of 2% (w/w) and nitrogen levels (250 and 500 mg N kg-1) were added to sandy loam soil polluted with Cd, Pb, Zn, and Cu. The experiment consisted of five treatments including: Control (C), nitrogen a rate of 250 (N250), or 500 mg kg (N500), BCP + N250, and BCP + N500. Maximum tomato growth was achieved in the soil that was treated with BCP + N500, followed by BCP + N250, while lowest one was observed in the control. Tomato yield as affected by the BCP and N-fertilization was in the descending order: BCP + N500 > BCP + N250 > N500 = N250 > C. The addition of N250, N500, BCP + N250, and BCP + N500 increased the fruit yield by 24, 31, 35, 58% in comparison with the control. Levels of Zn, Cu, and Pb in tomato fruit was in the descending order: N500> N250 > C > BCP + N500 > BCP + N250. The combined application of BCP and N-fertilization augmented the availability and uptake of essential nutrients and effectively reduced those of toxic ones. The addition of BCP + N250 decreased Zn, Cu, Cd, and Pb content in fruit of tomato by 16, 10, 54, 54, and 58%, respectively, compared to the control soil, while these decreases were 13, 16, 60, 60, and 72% in the case of BCP + N500. BCP succeeded significantly in reducing the release of toxic chemicals, which ultimately may restrict the transfer of toxic chemical to the food chain solution. Novelty statement Tomato grown on metal-contaminated soils contains high levels of toxic metals. Phosphorus-loaded biochar (BCP) reduced the negative effects of high inorganic-N rates by reducing the release of toxic metals to the soil solution. BCP enhanced the soil quality indicators and increased the soil microbe's activity.
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Affiliation(s)
- Zheli Ding
- Haikou Experimental Station, Chinese Academy of Tropical Agricultural Sciences (CATAS), Haikou, China
| | - Saif Alharbi
- King Abdulaziz City for Science and Technology, Riyadh, Saudi Arabia
| | - Esmat F Ali
- Department of Biology, College of Science, Taif University, Taif, Saudi Arabia
| | - Adel M Ghoneim
- Field Crops Research Institute, Agricultural Research Center, Giza, Egypt
| | - Marzoq Hadi Al Fahd
- Department of Soil Sciences, Faculty of Food and Agriculture Sciences, King Saud University, Saudi Arabia
| | - Guangshuai Wang
- Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang, China
| | - Mamdouh A Eissa
- Haikou Experimental Station, Chinese Academy of Tropical Agricultural Sciences (CATAS), Haikou, China
- Department of Soils and Water, Faculty of Agriculture, Assiut University, Assiut, Egypt
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Shehab AESAE, Guo Y. Effects of nitrogen fertilization and drought on hydrocyanic acid accumulation and morpho-physiological parameters of sorghums. J Sci Food Agric 2021; 101:3355-3365. [PMID: 33227149 DOI: 10.1002/jsfa.10965] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 10/28/2020] [Accepted: 11/23/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Nitrogen fertilization can increase sorghum yield and quality and the hydrocyanic acid (HCN) accumulation in plants, increasing the risk of animal toxicity, particularly under drought conditions. In this study, plants of three sorghum genotypes (sweet sorghum, sudangrass and hybrid sorghum) were supplemented with nitrogen (0, 60, 90 and 120 kg N ha-1 ) under well-watered and drought-stressed conditions, aiming to investigate the responses of morpho-physiological parameters and HCN accumulation to drought and nitrogen fertilization. RESULTS Drought caused a decline in growth and photosynthesis. Average HCN content increased by 27.85% in drought-stressed plants when compared with those in well-watered plants. Drought increased the proline and soluble protein content, the content of O2 - , H2 O2 and malondialdehyde (MDA), and the activities of antioxidant enzymes in leaves of all three genotypes. Maximum plant growth and higher plant nutrient content (nitrogen and phosphorus) were observed at 120 kg N ha-1 , followed by 90 and 60 kg N ha-1 . However, a sharp increase in HCN content and a decrease in antioxidant enzyme activities were observed when nitrogen rates increased from 90 to 120 kg N ha-1 , suggesting that 90 kg N ha-1 might be better for sorghums under drought conditions. CONCLUSION These results suggest that optimum nitrogen application on sorghum under drought conditions could achieve a balance between plant defense and food safety, attributed to the reduced MDA, O2 - and H2 O2 accumulation, the improvement in photosynthesis parameters, the increase in soluble protein and proline content, and the increase in antioxidant enzyme activities. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Abd El Salam Abd El Shehab
- College of Animal Science and Technology, Southwest University, Chongqing, China
- Department of Agronomy, Faculty of Agriculture, AL-Azhar University, Cairo, Egypt
| | - Yanjun Guo
- College of Animal Science and Technology, Southwest University, Chongqing, China
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Meier MA, Lopez-Guerrero MG, Guo M, Schmer MR, Herr JR, Schnable JC, Alfano JR, Yang J. Rhizosphere Microbiomes in a Historical Maize-Soybean Rotation System Respond to Host Species and Nitrogen Fertilization at the Genus and Subgenus Levels. Appl Environ Microbiol 2021; 87:e0313220. [PMID: 33811028 PMCID: PMC8174755 DOI: 10.1128/aem.03132-20] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Accepted: 03/24/2021] [Indexed: 01/04/2023] Open
Abstract
Root-associated microbes are key players in plant health, disease resistance, and nitrogen (N) use efficiency. It remains largely unclear how the interplay of biological and environmental factors affects rhizobiome dynamics in agricultural systems. In this study, we quantified the composition of rhizosphere and bulk soil microbial communities associated with maize (Zea mays L.) and soybean (Glycine max L.) in a long-term crop rotation study under conventional fertilization and low-N regimes. Over two growing seasons, we evaluated the effects of environmental conditions and several treatment factors on the abundance of rhizosphere- and soil-colonizing microbial taxa. Time of sampling, host plant species, and N fertilization had major effects on microbiomes, while no effect of crop rotation was observed. Using variance partitioning as well as 16S sequence information, we further defined a set of 82 microbial genera and functional taxonomic groups at the subgenus level that show distinct responses to treatment factors. We identified taxa that are highly specific to either maize or soybean rhizospheres, as well as taxa that are sensitive to N fertilization in plant rhizospheres and bulk soil. This study provides insights to harness the full potential of soil microbes in maize and soybean agricultural systems through plant breeding and field management. IMPORTANCE Plant roots are colonized by large numbers of microbes, some of which may help the plant acquire nutrients and fight diseases. Our study contributes to a better understanding of root-colonizing microbes in the widespread and economically important maize-soybean crop rotation system. The long-term goal of this research is to optimize crop plant varieties and field management to create the best possible conditions for beneficial plant-microbe interactions to occur. These beneficial microbes may be harnessed to sustainably reduce dependency on pesticides and industrial fertilizer. We identify groups of microbes specific to the maize or to the soybean host and microbes that are sensitive to nitrogen fertilization. These microbes represent candidates that may be influenced through plant breeding or field management, and future research will be directed toward elucidating their roles in plant health and nitrogen usage.
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Affiliation(s)
- Michael A. Meier
- Department of Agronomy and Horticulture, University of Nebraska—Lincoln, Lincoln, Nebraska, USA
- Center for Plant Science Innovation, University of Nebraska—Lincoln, Lincoln, Nebraska, USA
| | | | - Ming Guo
- Department of Agronomy and Horticulture, University of Nebraska—Lincoln, Lincoln, Nebraska, USA
- Center for Plant Science Innovation, University of Nebraska—Lincoln, Lincoln, Nebraska, USA
| | - Marty R. Schmer
- USDA-ARS Agroecosystem Management Research Unit, Lincoln, Nebraska, USA
| | - Joshua R. Herr
- Center for Plant Science Innovation, University of Nebraska—Lincoln, Lincoln, Nebraska, USA
- Department of Plant Pathology, University of Nebraska—Lincoln, Lincoln, Nebraska, USA
| | - James C. Schnable
- Department of Agronomy and Horticulture, University of Nebraska—Lincoln, Lincoln, Nebraska, USA
- Center for Plant Science Innovation, University of Nebraska—Lincoln, Lincoln, Nebraska, USA
| | - James R. Alfano
- Center for Plant Science Innovation, University of Nebraska—Lincoln, Lincoln, Nebraska, USA
- Department of Plant Pathology, University of Nebraska—Lincoln, Lincoln, Nebraska, USA
| | - Jinliang Yang
- Department of Agronomy and Horticulture, University of Nebraska—Lincoln, Lincoln, Nebraska, USA
- Center for Plant Science Innovation, University of Nebraska—Lincoln, Lincoln, Nebraska, USA
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Chen S, Xiang X, Ma H, Penttinen P, Zhao J, Li H, Gao R, Zheng T, Fan G. Straw Mulching and Nitrogen Fertilization Affect Diazotroph Communities in Wheat Rhizosphere. Front Microbiol 2021; 12:658668. [PMID: 34093473 PMCID: PMC8175977 DOI: 10.3389/fmicb.2021.658668] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 04/09/2021] [Indexed: 11/30/2022] Open
Abstract
Diazotrophs that carry out the biological fixation of atmospheric dinitrogen (N2) replenish biologically available nitrogen (N) in soil and are influenced by the input of inorganic and organic substrates. To date, little is known about the effects of combined organic substrate addition and N fertilization on the diazotroph community composition and structure in purple soils. We investigated the effects of N fertilization and straw mulching on diazotroph communities by quantifying and sequencing the nifH gene in wheat rhizosphere. The abundance and richness of diazotrophs were greater the higher the fertilization level in the mulched treatments, whereas in the nonmulched treatments (NSMs), richness was lowest with the highest N fertilization level. The abundance and α-diversity of diazotrophs correlated with most of the soil properties but not with pH. At the genus level, the relative abundances of Azospirillum, Bacillus, and Geobacter were higher in the NSMs and those of Pseudacidovorax, Skermanella, Azospira, Paraburkholderia, Azotobacter, Desulfovibrio, Klebsiella, and Pelomonas in the mulched treatments. The differences in community composition between the mulched and the NSMs were associated with differences in soil temperature and soil organic carbon and available potassium contents and C:N ratio. Overall, straw mulching and N fertilization were associated with changes in diazotroph community composition and higher abundance of nifH gene in alkaline purple soils.
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Affiliation(s)
- Songhe Chen
- Key Laboratory of Crop Eco-Physiology and farming system in Southwest China, Ministry of Agriculture, College of Agronomy, Sichuan Agricultural University, Chengdu, China
| | - Xiaoling Xiang
- Key Laboratory of Crop Eco-Physiology and farming system in Southwest China, Ministry of Agriculture, College of Agronomy, Sichuan Agricultural University, Chengdu, China
| | - Hongliang Ma
- Key Laboratory of Crop Eco-Physiology and farming system in Southwest China, Ministry of Agriculture, College of Agronomy, Sichuan Agricultural University, Chengdu, China
| | - Petri Penttinen
- Department of Microbiology College of Resources, Sichuan Agricultural University, Chengdu, China
| | - Jiarong Zhao
- Key Laboratory of Crop Eco-Physiology and farming system in Southwest China, Ministry of Agriculture, College of Agronomy, Sichuan Agricultural University, Chengdu, China
| | - Han Li
- Key Laboratory of Crop Eco-Physiology and farming system in Southwest China, Ministry of Agriculture, College of Agronomy, Sichuan Agricultural University, Chengdu, China
| | - Rencai Gao
- Key Laboratory of Crop Eco-Physiology and farming system in Southwest China, Ministry of Agriculture, College of Agronomy, Sichuan Agricultural University, Chengdu, China
| | - Ting Zheng
- Key Laboratory of Crop Eco-Physiology and farming system in Southwest China, Ministry of Agriculture, College of Agronomy, Sichuan Agricultural University, Chengdu, China
| | - Gaoqiong Fan
- Key Laboratory of Crop Eco-Physiology and farming system in Southwest China, Ministry of Agriculture, College of Agronomy, Sichuan Agricultural University, Chengdu, China
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Wang J, Ma Y, Di L, Qian X, Wang G. Straw Incorporation with Nitrogen Amendment Shapes Bacterial Community Structure in an Iron-Rich Paddy Soil by Altering Nitrogen Reserves. Microorganisms 2021; 9:microorganisms9050988. [PMID: 34063690 PMCID: PMC8147819 DOI: 10.3390/microorganisms9050988] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 04/21/2021] [Accepted: 04/26/2021] [Indexed: 11/16/2022] Open
Abstract
Incorporation of crop straw into the soil along with inorganic fertilization is a widespread agricultural practice and is essential in nutrient-scarce soils, such as iron-rich (ferruginous) paddy soils. The responses of soil bacterial communities to straw incorporation under different nitrogen inputs in iron-rich soils remain unclear. Therefore, 6000 kg ha−1 dry wheat (Triticum aestivum L. cv. Zhengmai 12) straw was applied to a rice paddy with and without nitrogen amendment (0, 80, 300, and 450 kg ha−1 N as urea), to investigate its effects on soil fertility and bacterial community structure. Organic matter, total nitrogen, and water contents tended to decrease in straw-incorporated soils with different nitrogen inputs. Proteobacteria was the dominant bacterial phylum across all treatments (26.3–32.5% of total sequences), followed by Chloroflexi, Acidobacteria, and Nitrospirae. Up to 18.0% of all the taxa in the bacterial communities were associated with iron cycling. Straw incorporation with nitrogen amendment increased the relative abundance of iron oxidizers, Gallionellaceae, while decreasing the relative abundance of iron reducers, Geobacteraceae. Bacterial community composition shifted in different treatments, with total nitrogen, water, and Fe(III) contents being the key drivers. Straw incorporation supplemented by 300 kg ha−1 N increased bacterial richness and enhanced all the predicted bacterial functions, so that it is recommended as the optimal nitrogen dosage in practice.
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Affiliation(s)
- Juanjuan Wang
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China; (J.W.); (Y.M.); (X.Q.)
| | - Yao Ma
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China; (J.W.); (Y.M.); (X.Q.)
| | - Lin Di
- Zhenjiang Agricultural Technology Extension Station, Zhenjiang 212009, China;
| | - Xiaoqing Qian
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China; (J.W.); (Y.M.); (X.Q.)
| | - Guiliang Wang
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China; (J.W.); (Y.M.); (X.Q.)
- Correspondence:
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Chai YN, Ge Y, Stoerger V, Schachtman DP. High-resolution phenotyping of sorghum genotypic and phenotypic responses to low nitrogen and synthetic microbial communities. Plant Cell Environ 2021; 44:1611-1626. [PMID: 33495990 DOI: 10.1111/pce.14004] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Accepted: 12/17/2020] [Indexed: 05/12/2023]
Abstract
Much effort has been placed on developing microbial inoculants to replace or supplement fertilizers to improve crop productivity and environmental sustainability. However, many studies ignore the dynamics of plant-microbe interactions and the genotypic specificity of the host plant on the outcome of microbial inoculation. Thus, it is important to study temporal plant responses to inoculation in multiple genotypes within a single species. With the implementation of high-throughput phenotyping, the dynamics of biomass and nitrogen (N) accumulation of four sorghum genotypes with contrasting N-use efficiency were monitored upon the inoculation with synthetic microbial communities (SynComs) under high and low-N. Five SynComs comprising bacteria isolated from field grown sorghum were designed based on the overall phylar composition of bacteria and the enriched host compartment determined from a field-based culture independent study of the sorghum microbiome. We demonstrated that the growth response of sorghum to SynCom inoculation is genotype-specific and dependent on plant N status. The sorghum genotypes that were N-use inefficient were more susceptible to the colonization from a diverse set of inoculated bacteria as compared to the N-use efficient lines especially under low-N. By integrating high-throughput phenotyping with sequencing data, our findings highlight the roles of host genotype and plant nutritional status in determining colonization by bacterial synthetic communities.
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Affiliation(s)
- Yen Ning Chai
- Department of Agronomy and Horticulture and Center for Plant Science Innovation, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | - Yufeng Ge
- Department of Biological Systems Engineering, L.W. Chase Hall 203, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | - Vincent Stoerger
- Agricultural Research Division, Greenhouse Innovation Center, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | - Daniel P Schachtman
- Department of Agronomy and Horticulture and Center for Plant Science Innovation, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
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Carrara JE, Walter CA, Freedman ZB, Hostetler AN, Hawkins JS, Fernandez IJ, Brzostek ER. Differences in microbial community response to nitrogen fertilization result in unique enzyme shifts between arbuscular and ectomycorrhizal-dominated soils. Glob Chang Biol 2021; 27:2049-2060. [PMID: 33462956 DOI: 10.1111/gcb.15523] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2020] [Accepted: 12/27/2020] [Indexed: 06/12/2023]
Abstract
While the effect of nitrogen (N) deposition on belowground carbon (C) cycling varies, emerging evidence shows that forest soils dominated by trees that associate with ectomycorrhizal fungi (ECM) store more C than soils dominated by trees that associate with arbuscular mycorrhizae (AM) with increasing N deposition. We hypothesized that this is due to unique nutrient cycling responses to N between AM and ECM-dominated soils. ECM trees primarily obtain N through fungal mining of soil organic matter subsidized by root-C. As such, we expected the largest N-induced responses of C and N cycling to occur in ECM rhizospheres and be driven by fungi. Conversely, as AM trees rely on bacterial scavengers in bulk soils to cycle N, we predicted the largest AM responses to be driven by shifts in bacteria and occur in bulk soils. To test this hypothesis, we measured microbial community composition, metatranscriptome profiles, and extracellular enzyme activity in bulk, rhizosphere, and organic horizon (OH) soils in AM and ECM-dominated soils at Bear Brook Watershed in Maine, USA. After 27 years of N fertilization, fungal community composition shifted across ECM soils, but bacterial communities shifted across AM soils. These shifts were mirrored by enhanced C relative to N mining enzyme activities in both mycorrhizal types, but this occurred in different soil fractions. In ECM stands these shifts occurred in rhizosphere soils, but in AM stands they occurred in bulk soils. Additionally, ECM OH soils exhibited the opposite response with declines in C relative to N mining. As rhizosphere soils account for only a small portion of total soil volume relative to bulk soils, coupled with declines in C to N enzyme activity in ECM OH soils, we posit that this may partly explain why ECM soils store more C than AM soils as N inputs increase.
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Affiliation(s)
- Joseph E Carrara
- Department of Biology, West Virginia University, Morgantown, WV, USA
| | | | - Zachary B Freedman
- Department of Soil Science, University of Wisconsin-Madison, Madison, WI, USA
| | | | | | - Ivan J Fernandez
- School of Forest Resources and Climate Change Institute, University of Maine, Orono, ME, USA
| | - Edward R Brzostek
- Department of Biology, West Virginia University, Morgantown, WV, USA
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Liu J, Han J, Zhu C, Cao W, Luo Y, Zhang M, Zhang S, Jia Z, Yu R, Zhao J, Bao Z. Elevated Atmospheric CO 2 and Nitrogen Fertilization Affect the Abundance and Community Structure of Rice Root-Associated Nitrogen-Fixing Bacteria. Front Microbiol 2021; 12:628108. [PMID: 33967976 PMCID: PMC8103900 DOI: 10.3389/fmicb.2021.628108] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Accepted: 03/29/2021] [Indexed: 12/02/2022] Open
Abstract
Elevated atmospheric CO2 (eCO2) results in plant growth and N limitation, yet how root-associated nitrogen-fixing bacterial communities respond to increasing atmospheric CO2 and nitrogen fertilization (eN) during the growth stages of rice is unclear. Using the nifH gene as a molecular marker, we studied the combined effect of eCO2 and eN on the diazotrophic community and abundance at two growth stages in rice (tillering, TI and heading, HI). Quantitative polymerase chain reaction (qPCR) showed that eN had no obvious effect on nifH abundance in rice roots under either ambient CO2 (aCO2) or eCO2 treatment at the TI stage; in contrast, at the HI, nifH copy numbers were increased under eCO2 and decreased under aCO2. For rhizosphere soils, eN significantly reduced the abundance of nifH under both aCO2 and eCO2 treatment at the HI stage. Elevated CO2 significantly increased the nifH abundance in rice roots and rhizosphere soils with nitrogen fertilization, but had no obvious effect without N addition at the HI stage. There was a significant interaction [CO2 × N fertilization] effect on nifH abundance in root zone at the HI stage. In addition, the nifH copy numbers in rice roots were significantly higher at the HI stage than at the TI stage. Sequencing analysis indicated that the root-associated diazotrophic community structure tended to cluster according to the nitrogen fertilization treatment and that Rhizobiales were the dominant diazotrophs in all root samples at the HI stage. Additionally, nitrogen fertilization significantly increased the relative abundance of Methylosinus (Methylocystaceae) under eCO2 treatment, but significantly decreased the relative abundance of Rhizobium (Rhizobiaceae) under aCO2 treatment. Overall, the combined effect of eN and eCO2 stimulates root-associated diazotrophic methane-oxidizing bacteria while inhibits heterotrophic diazotrophs.
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Affiliation(s)
- Jumei Liu
- Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau and Inner Mongolia Key Laboratory of Grassland Ecology, School of Ecology and Environment, Inner Mongolia University, Hohhot, China
- Inner Mongolia Key Laboratory of Environmental Pollution Control and Waste Resource Reuse, Inner Mongolia University, Hohhot, China
- Chongqing Key Laboratory of Environmental Materials and Remediation Technologies, College of Chemistry and Environmental Engineering, Chongqing University of Arts and Sciences, Chongqing, China
| | - Jingjing Han
- Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau and Inner Mongolia Key Laboratory of Grassland Ecology, School of Ecology and Environment, Inner Mongolia University, Hohhot, China
| | - Chunwu Zhu
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China
| | - Weiwei Cao
- Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau and Inner Mongolia Key Laboratory of Grassland Ecology, School of Ecology and Environment, Inner Mongolia University, Hohhot, China
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China
| | - Ying Luo
- Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau and Inner Mongolia Key Laboratory of Grassland Ecology, School of Ecology and Environment, Inner Mongolia University, Hohhot, China
| | - Meng Zhang
- Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau and Inner Mongolia Key Laboratory of Grassland Ecology, School of Ecology and Environment, Inner Mongolia University, Hohhot, China
| | - Shaohua Zhang
- Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau and Inner Mongolia Key Laboratory of Grassland Ecology, School of Ecology and Environment, Inner Mongolia University, Hohhot, China
| | - Zhongjun Jia
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China
| | - Ruihong Yu
- Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau and Inner Mongolia Key Laboratory of Grassland Ecology, School of Ecology and Environment, Inner Mongolia University, Hohhot, China
- Inner Mongolia Key Laboratory of Environmental Pollution Control and Waste Resource Reuse, Inner Mongolia University, Hohhot, China
| | - Ji Zhao
- Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau and Inner Mongolia Key Laboratory of Grassland Ecology, School of Ecology and Environment, Inner Mongolia University, Hohhot, China
- Inner Mongolia Key Laboratory of Environmental Pollution Control and Waste Resource Reuse, Inner Mongolia University, Hohhot, China
| | - Zhihua Bao
- Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau and Inner Mongolia Key Laboratory of Grassland Ecology, School of Ecology and Environment, Inner Mongolia University, Hohhot, China
- Inner Mongolia Key Laboratory of Environmental Pollution Control and Waste Resource Reuse, Inner Mongolia University, Hohhot, China
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Wang R, Bicharanloo B, Shirvan MB, Cavagnaro TR, Jiang Y, Keitel C, Dijkstra FA. A novel 13 C pulse-labelling method to quantify the contribution of rhizodeposits to soil respiration in a grassland exposed to drought and nitrogen addition. New Phytol 2021; 230:857-866. [PMID: 33253439 DOI: 10.1111/nph.17118] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Accepted: 11/24/2020] [Indexed: 05/21/2023]
Abstract
Rhizodeposition plays an important role in below-ground carbon (C) cycling. However, quantification of rhizodeposition in intact plant-soil systems has remained elusive due to methodological issues. We used a 13 C-CO2 pulse-labelling method to quantify the contribution of rhizodeposition to below-ground respiration. Intact plant-soil cores were taken from a grassland field, and in half, shoots and roots were removed (unplanted cores). Both unplanted and planted cores were assigned to drought and nitrogen (N) treatments. Afterwards, shoots in planted cores were pulse labelled with 13 C-CO2 and then clipped to determine total below-ground respiration and its δ13 C. Simultaneously, δ13 C was measured for the respiration of live roots, soils with rhizodeposits, and unplanted treatments, and used as endmembers with which to determine root respiration and rhizodeposit C decomposition using two-source mixing models. Rhizodeposit decomposition accounted for 7-31% of total below-ground respiration. Drought reduced decomposition of both rhizodeposits and soil organic carbon (SOC), while N addition increased root respiration but not the contribution of rhizodeposit C decomposition to below-ground respiration. This study provides a new approach for the partitioning of below-ground respiration into different sources, and indicates that decomposition of rhizodeposit C is an important component of below-ground respiration that is sensitive to drought and N addition in grassland ecosystems.
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Affiliation(s)
- Ruzhen Wang
- Erguna Forest-Steppe Ecotone Ecosystem Research Station, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China
- School of Life and Environmental Sciences, Sydney Institute of Agriculture, The University of Sydney, Camden, NSW, 2570, Australia
| | - Bahareh Bicharanloo
- School of Life and Environmental Sciences, Sydney Institute of Agriculture, The University of Sydney, Camden, NSW, 2570, Australia
| | - Milad Bagheri Shirvan
- School of Life and Environmental Sciences, Sydney Institute of Agriculture, The University of Sydney, Camden, NSW, 2570, Australia
| | - Timothy R Cavagnaro
- School of Agriculture, Food and Wine, The University of Adelaide, PMB 1, Glen Osmond, SA, 5065, Australia
| | - Yong Jiang
- Erguna Forest-Steppe Ecotone Ecosystem Research Station, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China
| | - Claudia Keitel
- School of Life and Environmental Sciences, Sydney Institute of Agriculture, The University of Sydney, Camden, NSW, 2570, Australia
| | - Feike A Dijkstra
- School of Life and Environmental Sciences, Sydney Institute of Agriculture, The University of Sydney, Camden, NSW, 2570, Australia
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Zhang H, Yuan F, Wu J, Jin C, Pivovaroff AL, Tian J, Li W, Guan D, Wang A, McDowell NG. Responses of functional traits to seven-year nitrogen addition in two tree species: coordination of hydraulics, gas exchange and carbon reserves. Tree Physiol 2021; 41:190-205. [PMID: 33313912 DOI: 10.1093/treephys/tpaa120] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Revised: 07/25/2020] [Accepted: 09/16/2020] [Indexed: 06/12/2023]
Abstract
Atmospheric nitrogen (N) deposition has been observed to impact plant structure and functional traits in terrestrial ecosystems. Although the effect of N deposition on plant water use has been well-evaluated in laboratories and in experimental forests, the linkages between water and carbon relations under N deposition are unclear. Here, we report on hydraulics, gas exchange and carbon reserves of two broad-leaved tree species (Quercus mongolica and Fraxinus mandshurica) in mature temperate forests after a seven-year experiment with different levels of N addition (control (CK), low (23 kg N ha-1 yr-1), medium (46 kg N ha-1 yr-1) and high (69 kg N ha-1 yr-1)). We investigated variation in hydraulic traits (xylem-specific hydraulic conductivity (Ks), native percentage loss of conductivity (PLC) and leaf water potential), xylem anatomy (vessel diameter and density), gas exchange (maximum net photosynthesis rate and stomatal conductance) and carbon reserves (soluble sugars, starch and total nonstructural carbohydrates (NSC)) with different N addition levels. We found that medium N addition significantly increased Ks and vessel diameter compared to control, but accompanied increasing PLC and decreasing leaf water potential, suggesting that N addition results in a greater hydraulic efficiency and higher risk of embolism. N addition promoted photosynthetic capacity via increasing foliar N concentration but did not change stomatal conductance. In addition, we found increase in foliar soluble sugar concentration and decrease in starch concentration with N addition, and positive correlations between hydraulic traits (vessel diameter and PLC) and soluble sugars. These coupled responses of tree hydraulics and carbon metabolism are consistent with a regulatory role of carbohydrates in maintaining hydraulic integrity. Our study provides an important insight into the relationship of plant water transport and carbon dynamics under increasing N deposition.
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Affiliation(s)
- Hongxia Zhang
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Fenghui Yuan
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
| | - Jiabing Wu
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
| | - Changjie Jin
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
| | - Alexandria L Pivovaroff
- Atmospheric Sciences & Global Change Division, Pacific Northwest National Laboratory, Richland, WA 99354, USA
| | - Jinyuan Tian
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Weibin Li
- State Key Laboratory of Grassland and Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China
| | - Dexin Guan
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
| | - Anzhi Wang
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
| | - Nate G McDowell
- Atmospheric Sciences & Global Change Division, Pacific Northwest National Laboratory, Richland, WA 99354, USA
- School of Biological Sciences, Washington State University, Pullman, WA 99164-4236, USA
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49
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Hamann E, Blevins C, Franks SJ, Jameel MI, Anderson JT. Climate change alters plant-herbivore interactions. New Phytol 2021; 229:1894-1910. [PMID: 33111316 DOI: 10.1111/nph.17036] [Citation(s) in RCA: 68] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Accepted: 09/18/2020] [Indexed: 06/11/2023]
Abstract
Plant-herbivore interactions have evolved in response to coevolutionary dynamics, along with selection driven by abiotic conditions. We examine how abiotic factors influence trait expression in both plants and herbivores to evaluate how climate change will alter this long-standing interaction. The paleontological record documents increased herbivory during periods of global warming in the deep past. In phylogenetically corrected meta-analyses, we find that elevated temperatures, CO2 concentrations, drought stress and nutrient conditions directly and indirectly induce greater food consumption by herbivores. Additionally, elevated CO2 delays herbivore development, but increased temperatures accelerate development. For annual plants, higher temperatures, CO2 and drought stress increase foliar herbivory. Our meta-analysis also suggests that greater temperatures and drought may heighten florivory in perennials. Human actions are causing concurrent shifts in CO2 , temperature, precipitation regimes and nitrogen deposition, yet few studies evaluate interactions among these changing conditions. We call for additional multifactorial studies that simultaneously manipulate multiple climatic factors, which will enable us to generate more robust predictions of how climate change could disrupt plant-herbivore interactions. Finally, we consider how shifts in insect and plant phenology and distribution patterns could lead to ecological mismatches, and how these changes may drive future adaptation and coevolution between interacting species.
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Affiliation(s)
- Elena Hamann
- Department of Genetics and Odum School of Ecology, University of Georgia, Athens, GA, 30602, USA
- Department of Biological Sciences, Fordham University, Bronx, NY, 10458, USA
| | - Cameron Blevins
- Department of Genetics and Odum School of Ecology, University of Georgia, Athens, GA, 30602, USA
| | - Steven J Franks
- Department of Biological Sciences, Fordham University, Bronx, NY, 10458, USA
| | - M Inam Jameel
- Department of Genetics and Odum School of Ecology, University of Georgia, Athens, GA, 30602, USA
| | - Jill T Anderson
- Department of Genetics and Odum School of Ecology, University of Georgia, Athens, GA, 30602, USA
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50
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Zhang S, Zhang Y, Li K, Yan M, Zhang J, Yu M, Tang S, Wang L, Qu H, Luo L, Xuan W, Xu G. Nitrogen Mediates Flowering Time and Nitrogen Use Efficiency via Floral Regulators in Rice. Curr Biol 2020; 31:671-683.e5. [PMID: 33278354 DOI: 10.1016/j.cub.2020.10.095] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Revised: 10/10/2020] [Accepted: 10/30/2020] [Indexed: 11/29/2022]
Abstract
High nitrogen (N) fertilization for maximizing crop yield commonly leads to postponed flowering time (heading date in rice) and ripening, thus affecting resources use efficiency and followed planting time. We found that N-mediated heading date-1 (Nhd1) can directly activate florigen gene OsHd3a in rice. Inactivation of either Nhd1 or OsHd3a results in delay and insensitivity to N supply of flowering time. Knockout of Nhd1 increases N uptake and utilization efficiency at low-to-moderate N level under both short- and long-day field conditions. Increasing glutamine, the product of N assimilation, can upregulate expression of Nhd1, which in turn downregulates OsFd-GOGAT expression and OsFd-GOGAT activity, displaying a Nhd1-controlled negative feedback regulatory pathway of N assimilation. Moreover, N fertilization effect on rice flowering time shows genetically controlled diversity, and single-nucleotide polymorphism in Nhd1 promoter may relate to different responses of flowering time to N application. Nhd1 thus balances flowering time and N use efficiency in addition to photoperiod in rice.
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Affiliation(s)
- Shunan Zhang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Plant Nutrition and Fertilization in Low-Middle Reaches of the Yangtze River, Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, China
| | - Yuyi Zhang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Plant Nutrition and Fertilization in Low-Middle Reaches of the Yangtze River, Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, China
| | - Kangning Li
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Plant Nutrition and Fertilization in Low-Middle Reaches of the Yangtze River, Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, China
| | - Ming Yan
- Shanghai Agrobiological Gene Center, Shanghai 201106, China
| | - Jinfei Zhang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Plant Nutrition and Fertilization in Low-Middle Reaches of the Yangtze River, Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, China
| | - Ming Yu
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Plant Nutrition and Fertilization in Low-Middle Reaches of the Yangtze River, Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, China
| | - Shuo Tang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Plant Nutrition and Fertilization in Low-Middle Reaches of the Yangtze River, Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, China
| | - Luyang Wang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Plant Nutrition and Fertilization in Low-Middle Reaches of the Yangtze River, Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, China
| | - Hongye Qu
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Plant Nutrition and Fertilization in Low-Middle Reaches of the Yangtze River, Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, China
| | - Le Luo
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Plant Nutrition and Fertilization in Low-Middle Reaches of the Yangtze River, Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, China
| | - Wei Xuan
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Plant Nutrition and Fertilization in Low-Middle Reaches of the Yangtze River, Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, China
| | - Guohua Xu
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Plant Nutrition and Fertilization in Low-Middle Reaches of the Yangtze River, Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, China.
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