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Pena R, Tibbett M. Mycorrhizal symbiosis and the nitrogen nutrition of forest trees. Appl Microbiol Biotechnol 2024; 108:461. [PMID: 39249589 PMCID: PMC11384646 DOI: 10.1007/s00253-024-13298-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2024] [Revised: 08/27/2024] [Accepted: 08/28/2024] [Indexed: 09/10/2024]
Abstract
Terrestrial plants form primarily mutualistic symbiosis with mycorrhizal fungi based on a compatible exchange of solutes between plant and fungal partners. A key attribute of this symbiosis is the acquisition of soil nutrients by the fungus for the benefit of the plant in exchange for a carbon supply to the fungus. The interaction can range from mutualistic to parasitic depending on environmental and physiological contexts. This review considers current knowledge of the functionality of ectomycorrhizal (EM) symbiosis in the mobilisation and acquisition of soil nitrogen (N) in northern hemisphere forest ecosystems, highlighting the functional diversity of the fungi and the variation of symbiotic benefits, including the dynamics of N transfer to the plant. It provides an overview of recent advances in understanding 'mycorrhizal decomposition' for N release from organic or mineral-organic forms. Additionally, it emphasises the taxon-specific traits of EM fungi in soil N uptake. While the effects of EM communities on tree N are likely consistent across different communities regardless of species composition, the sink activities of various fungal taxa for tree carbon and N resources drive the dynamic continuum of mutualistic interactions. We posit that ectomycorrhizas contribute in a species-specific but complementary manner to benefit tree N nutrition. Therefore, alterations in diversity may impact fungal-plant resource exchange and, ultimately, the role of ectomycorrhizas in tree N nutrition. Understanding the dynamics of EM functions along the mutualism-parasitism continuum in forest ecosystems is essential for the effective management of ecosystem restoration and resilience amidst climate change. KEY POINTS: • Mycorrhizal symbiosis spans a continuum from invested to appropriated benefits. • Ectomycorrhizal fungal communities exhibit a high functional diversity. • Tree nitrogen nutrition benefits from the diversity of ectomycorrhizal fungi.
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Affiliation(s)
- Rodica Pena
- Department of Sustainable Land Management, School of Agriculture, Policy and Development, University of Reading, Reading, UK.
- Department of Silviculture, Transilvania University of Brasov, Brasov, Romania.
| | - Mark Tibbett
- Department of Sustainable Land Management, School of Agriculture, Policy and Development, University of Reading, Reading, UK
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Camuy-Vélez LA, Banerjee S, Sedivec K. Grazing intensity alters network complexity and predator-prey relationships in the soil microbiome. Appl Environ Microbiol 2024:e0042524. [PMID: 39235241 DOI: 10.1128/aem.00425-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Accepted: 08/13/2024] [Indexed: 09/06/2024] Open
Abstract
Grasslands are recognized as important reservoirs of soil biodiversity. Livestock grazing is implemented as a grassland management strategy to improve soil quality and enhance plant diversity. Soil microbial communities play a pivotal role in grassland ecosystems, so it is important to examine whether grazing practices affect the soil microbiome. Previous studies on grazing have primarily focused on bacteria and fungi, overlooking an important group-protists. Protists are vital in soil microbiomes as they drive nutrient availability and trophic interactions. Determining the impact of grazing on protists and their relationships with bacterial and fungal communities is important for understanding soil microbiome dynamics in grazed ecosystems. In this study, we investigated soil bacterial, fungal, and protist communities under four grazing levels: no grazing, moderate-use grazing, full-use grazing, and heavy-use grazing. Our results showed that heavy grazing led to a greater diversity of protists with specific groups, such as Discoba and Conosa, increasing in abundance. We also found strong associations between protist and bacterial/fungal members, indicating their intricate relationships within the soil microbiome. For example, the abundance of predatory protists increased under grazing while arbuscular mycorrhizal fungi decreased. Notably, arbuscular mycorrhizae were negatively associated with predatory groups. Furthermore, we observed that microbial network complexity increased with grazing intensity, with fungal members playing an important role in the network. Overall, our study reports the impact of temporal grazing intensity on soil microbial dynamics and highlights the importance of considering protist ecology when evaluating the effects of grazing on belowground communities in grassland ecosystems. IMPORTANCE The significance of this study lies in its exploration of the effects of temporal grazing intensity on the dynamics of the soil microbiome, specifically focusing on the often-neglected role of protists. Our findings provide insights into the complex relationships between protists, bacteria, and fungi, emphasizing their impact on trophic interactions in the soil. Gaining a better understanding of these dynamics is essential for developing effective strategies for grassland management and conservation, underscoring the importance of incorporating protist ecology into microbiome studies in grasslands.
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Affiliation(s)
- Lennel A Camuy-Vélez
- Microbiological Sciences, North Dakota State University, Fargo, North Dakota, USA
| | - Samiran Banerjee
- Microbiological Sciences, North Dakota State University, Fargo, North Dakota, USA
| | - Kevin Sedivec
- School of Natural Resource Science, North Dakota State University, Fargo, North Dakota, USA
- Central Grasslands Research Extension Center, North Dakota State University, Streeter, North Dakota, USA
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Saladin G, Soubrand M, Joussein E, Benjelloun I. Efficiency of metal(loid) phytostabilization by white lupin (Lupinus albus L.), common vetch (Vicia sativa L.), and buckwheat (Fagopyrum esculentum Moench). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:55822-55835. [PMID: 39245670 DOI: 10.1007/s11356-024-34911-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Accepted: 08/30/2024] [Indexed: 09/10/2024]
Abstract
Erosion and leaching of metal(loid)s from contaminated sites can spread pollution to adjacent ecosystems and be a source of toxicity for living organisms. Phytostabilization consists of selecting plant species accumulating little or no metal(loid)s in aerial parts to establish a vegetation cover and thus to stabilize the contaminants in the soil. Seeds of white lupin, common vetch, and buckwheat were sown in greenhouse on soils from former French mines (Pontgibaud and Vaulry) contaminated with metal(loid)s including high concentrations of As and Pb (772 to 1064 and 121 to 12,340 mg kg-1, respectively). After 3 weeks of exposure, the growth of white lupin was less affected than that of the 2 other species probably because metal(loid) concentrations in roots and aerial parts of lupins were lower (5-20 times less Pb in lupin leaves on Pontgibaud soil and 5-10 times less As in lupin leaves on Vaulry soil than in vetch and buckwheat). To limit oxidation and/or scavenge metal(loid)s, white lupin increased the content of proline and total phenolic compounds (TPC) in leaves and roots by a factor 2 whereas buckwheat stimulated the production of TPC by a factor 1.5-2, and non-protein thiols (NPT) by factors around 1.75 in leaves and 6-12 in roots. Vetch accumulated more proline than white lupin but less NPT than buckwheat and less TPC than the 2 other plant species. The level of oxidation was however higher than in control plants for the 3 species indicating that defense mechanisms were not completely effective. Overall, our results showed that white lupin was the best species for phytostabilization but amendments should be tested to improve its tolerance to metal(loid)s.
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Affiliation(s)
- Gaëlle Saladin
- Laboratoire E2Lim Eau & Environnement, UR 24133, Université de Limoges, 123 Avenue Albert Thomas, 87060, Limoges Cedex, France.
| | - Marilyne Soubrand
- Laboratoire E2Lim Eau & Environnement, UR 24133, Université de Limoges, 123 Avenue Albert Thomas, 87060, Limoges Cedex, France
| | - Emmanuel Joussein
- Laboratoire E2Lim Eau & Environnement, UR 24133, Université de Limoges, 123 Avenue Albert Thomas, 87060, Limoges Cedex, France
| | - Ilham Benjelloun
- Laboratoire E2Lim Eau & Environnement, UR 24133, Université de Limoges, 123 Avenue Albert Thomas, 87060, Limoges Cedex, France
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Fujimatsu T, Tsuno Y, Oonishi A, Yano T, Maeda H, Endo K, Yazaki K, Sugiyama A. O-Methylated Isoflavones Induce nod Genes of Mesorhizobium ciceri and Pratensein Promotes Nodulation in Chickpea. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:18465-18477. [PMID: 39110140 DOI: 10.1021/acs.jafc.4c03064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/22/2024]
Abstract
Legume plants form symbiotic relationships with rhizobia, which allow plants to utilize atmospheric nitrogen as a nutrient. This symbiosis is initiated by secretion of specific signaling metabolites from the roots, which induce the expression of nod genes in rhizobia. These metabolites are called nod gene inducers (NGIs), and various flavonoids have been found to act as NGIs. However, NGIs of chickpea, the second major pulse crop, remain elusive. We conducted untargeted metabolome analysis of chickpea root exudates to explore metabolites with increased secretion under nitrogen deficiency. Principal component (PC) analysis showed a clear difference between nitrogen deficiency and control, with PC1 alone accounting for 37.5% of the variance. The intensity of two features with the highest PC1 loading values significantly increased under nitrogen deficiency; two prominent peaks were identified as O-methylated isoflavones, pratensein and biochanin A. RNA-seq analysis showed that they induce nodABC gene expression in the Mesorhizobium ciceri symbiont, suggesting that pratensein and biochanin A are chickpea NGIs. Pratensein applied concurrently with M. ciceri at sowing promoted chickpea nodulation. These results demonstrate that pratensein and biochanin A are chickpea NGIs, and pratensein can be useful for increasing nodulation efficiency in chickpea production.
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Affiliation(s)
- Teruhisa Fujimatsu
- Biological Science Research Laboratories, Kao Corporation, 2606 Ichikai, Haga, Tochigi 321-3497, Japan
| | - Yuhei Tsuno
- Biological Science Research Laboratories, Kao Corporation, 2606 Ichikai, Haga, Tochigi 321-3497, Japan
| | - Atsuki Oonishi
- Biological Science Research Laboratories, Kao Corporation, 2606 Ichikai, Haga, Tochigi 321-3497, Japan
| | - Takehisa Yano
- Safety Science Research Laboratories, Kao Corporation, 2606 Ichikai, Haga, Tochigi 321-3497, Japan
| | - Haruka Maeda
- Biological Science Research Laboratories, Kao Corporation, 2606 Ichikai, Haga, Tochigi 321-3497, Japan
| | - Keiji Endo
- Biological Science Research Laboratories, Kao Corporation, 2606 Ichikai, Haga, Tochigi 321-3497, Japan
| | - Kazufumi Yazaki
- Laboratory of Plant Gene Expression, Research Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji 611-0011, Japan
| | - Akifumi Sugiyama
- Laboratory of Plant Gene Expression, Research Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji 611-0011, Japan
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Kshetri L, Kotoky R, Debnath S, Maheshwari DK, Pandey P. Shift in the soil rhizobacterial community for enhanced solubilization and bioavailability of phosphorus in the rhizosphere of Allium hookeri Thwaites, through bioaugmentation of phosphate-solubilizing bacteria. 3 Biotech 2024; 14:185. [PMID: 39077622 PMCID: PMC11283447 DOI: 10.1007/s13205-024-04026-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 07/14/2024] [Indexed: 07/31/2024] Open
Abstract
Allium hookeri is an indigenous perennial herb known for its therapeutic properties. It's grown in the eastern Himalayas and East Asia, where it is used as a flavoring agent in local cuisines. This research aims to enhance soil phosphorus mobilization and promote A. hookeri growth using a consortium of phosphate-solubilizing bacteria (PSB). The synergistic effect of a bacterial consortium containing multiple PSBs (Arthrobacter luteolus and several Klebsiella spp.) combined with tricalcium phosphate (TCP), was investigated to enhance the growth of A. hookeri plants, and its influence on modulating the rhizosphere microbiome was also assessed. The greenhouse experiment revealed that the bacterial consortium with tricalcium phosphate (BTCP) treatment enhanced the dry shoot weight by 70%. Proteobacteria dominated the rhizosphere's microbiome in all treatments. BTCP treatment enhanced the relative abundance of several beneficial genera such Bacillus, Mesorhizobium, Pseudomonas, Ensifer, Hyphomicrobium, Planctomyces, and Bradyrhizobium. The augmentation of bacterial consortium increased P in shoots (4.36 ± 0.63 mg/g) and in roots (2.34 ± 0.27 mg/g), which was more than 500% higher as compared to the uninoculated control. Canonical correspondence analysis (CCA) indicated significant correlations (p ≤ 0.05) between phosphorus content in the shoot, fresh weight, and dry weight, with higher relative abundances of Bacteroidetes, Cyanobacteria, and Fibrobacteres. Functional genes related to siderophore biosynthesis, ABC transporters, phosphatenate, and phosphinate metabolism exhibited positive modulation, indicating higher relative abundances associated with the BTCP treatment. The findings demonstrate the crucial contribution of the bacterial consortium in promoting plant development, improving soil nutrient levels, and influencing the rhizospheric microbiota, implying its significance in sustainable agriculture. Supplementary Information The online version contains supplementary material available at 10.1007/s13205-024-04026-2.
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Affiliation(s)
| | - Rhitu Kotoky
- Department of Microbiology, Assam University, Silchar, Assam 788011 India
| | - Sourav Debnath
- Department of Microbiology, Assam University, Silchar, Assam 788011 India
| | - D. K. Maheshwari
- Department of Botany and Microbiology, Gurukula Kangri University, Haridwar, Uttarakhand 249404 India
| | - Piyush Pandey
- Department of Microbiology, Assam University, Silchar, Assam 788011 India
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Du B, Haensch R, Alfarraj S, Rennenberg H. Strategies of plants to overcome abiotic and biotic stresses. Biol Rev Camb Philos Soc 2024; 99:1524-1536. [PMID: 38561998 DOI: 10.1111/brv.13079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 03/21/2024] [Accepted: 03/26/2024] [Indexed: 04/04/2024]
Abstract
In their environment, plants are exposed to a multitude of abiotic and biotic stresses that differ in intensity, duration and severity. As sessile organisms, they cannot escape these stresses, but instead have developed strategies to overcome them or to compensate for the consequences of stress exposure. Defence can take place at different levels and the mechanisms involved are thought to differ in efficiency across these levels. To minimise metabolic constraints and to reduce the costs of stress defence, plants prioritise first-line defence strategies in the apoplastic space, involving ascorbate, defensins and small peptides, as well as secondary metabolites, before cellular processes are affected. In addition, a large number of different symplastic mechanisms also provide efficient stress defence, including chemical antioxidants, antioxidative enzymes, secondary metabolites, defensins and other peptides as well as proteins. At both the symplastic and the apoplastic level of stress defence and compensation, a number of specialised transporters are thought to be involved in exchange across membranes that still have not been identified, and information on the regeneration of different defence compounds remains ambiguous. In addition, strategies to overcome and compensate for stress exposure operate not only at the cellular, but also at the organ and whole-plant levels, including stomatal regulation, and hypersensitive and systemic responses to prevent or reduce the spread of stress impacts within the plant. Defence can also take place at the ecosystem level by root exudation of signalling molecules and the emission of volatile organic compounds, either directly or indirectly into the rhizosphere and/or the aboveground atmosphere. The mechanisms by which plants control the production of these compounds and that mediate perception of stressful conditions are still not fully understood. Here we summarise plant defence strategies from the cellular to ecosystem level, discuss their advantages and disadvantages for plant growth and development, elucidate the current state of research on the transport and regeneration capacity of defence metabolites, and outline insufficiently explored questions for further investigation.
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Affiliation(s)
- Baoguo Du
- College of Life Science and Biotechnology, Ecological Security and Protection Key laboratory of Sichuan Province, Mianyang Normal University, Mianxing Road West 166, Mianyang, 621000, PR China
- Chair of Tree Physiology, Institute of Forest Sciences, University of Freiburg, Georges-Köhler-Allee 53, Freiburg, D-79110, Germany
| | - Robert Haensch
- Institute of Plant Biology, Technische Universität Braunschweig, Humboldtstr. 1, Braunschweig, D-38106, Germany
- Center of Molecular Ecophysiology (CMEP), College of Resources and Environment, Southwest University, No. 2, Tiansheng Road, Beibei District, Chongqing, 400715, PR China
| | - Saleh Alfarraj
- King Saud University, PO Box 2455, Riyadh, 11451, Saudi Arabia
| | - Heinz Rennenberg
- Chair of Tree Physiology, Institute of Forest Sciences, University of Freiburg, Georges-Köhler-Allee 53, Freiburg, D-79110, Germany
- Center of Molecular Ecophysiology (CMEP), College of Resources and Environment, Southwest University, No. 2, Tiansheng Road, Beibei District, Chongqing, 400715, PR China
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Lorch MG, Valverde C, Agaras BC. Variability in Maize Seed Bacterization and Survival Correlating with Root Colonization by Pseudomonas Isolates with Plant-Probiotic Traits. PLANTS (BASEL, SWITZERLAND) 2024; 13:2130. [PMID: 39124248 PMCID: PMC11314135 DOI: 10.3390/plants13152130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2024] [Revised: 07/29/2024] [Accepted: 07/30/2024] [Indexed: 08/12/2024]
Abstract
Seed treatment with plant growth-promoting bacteria represents the primary strategy to incorporate them into agricultural ecosystems, particularly for crops under extensive management, such as maize. In this study, we evaluated the seed bacterization levels, root colonization patterns, and root competitiveness of a collection of autochthonous Pseudomonas isolates that have demonstrated several plant-probiotic abilities in vitro. Our findings indicate that the seed bacterization level, both with and without the addition of various protectants, is specific to each Pseudomonas strain, including their response to seed pre-hydration. Bacterization kinetics revealed that while certain isolates persisted on seed surfaces for up to 4 days post-inoculation (dpi), others experienced a rapid decline in viability after 1 or 2 dpi. The observed differences in seed bacterization levels were consistent with the root colonization densities observed through confocal microscopy analysis, and with root competitiveness quantified via selective plate counts. Notably, isolates P. protegens RBAN4 and P. chlororaphis subsp. aurantiaca SMMP3 demonstrated effective competition with the natural microflora for colonizing the maize rhizosphere and both promoted shoot and root biomass production in maize assessed at the V3 grown stage. Conversely, P. donghuensis SVBP6 was detected at very low levels in the maize rhizosphere, but still exhibited a positive effect on plant parameters, suggesting a growth-stimulatory effect during the early stages of plant development. In conclusion, there is a considerable strain-specific variability in the maize seed bacterization and survival capacities of Pseudomonas isolates with plant-probiotic traits, with a correlation in their root competitiveness under natural conditions. This variability must be understood to optimize their adoption as inputs for the agricultural system. Our experimental approach emphasizes the critical importance of tailoring seed bacterization treatments for each inoculant candidate, including the selection and incorporation of protective substances. It should not be assumed that all bacterial cells exhibit a similar performance.
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Affiliation(s)
- Melani G. Lorch
- Laboratory of Physiology and Genetics of Plant Probiotic Bacteria (LFGBBP), Centre of Biochemistry and Microbiology of Soils, National University of Quilmes, Bernal B1876BXD, Argentina; (M.G.L.); (C.V.)
- National Scientific and Technical Research Council (CONICET), Buenos Aires C1425FQB, Argentina
| | - Claudio Valverde
- Laboratory of Physiology and Genetics of Plant Probiotic Bacteria (LFGBBP), Centre of Biochemistry and Microbiology of Soils, National University of Quilmes, Bernal B1876BXD, Argentina; (M.G.L.); (C.V.)
- National Scientific and Technical Research Council (CONICET), Buenos Aires C1425FQB, Argentina
| | - Betina C. Agaras
- Laboratory of Physiology and Genetics of Plant Probiotic Bacteria (LFGBBP), Centre of Biochemistry and Microbiology of Soils, National University of Quilmes, Bernal B1876BXD, Argentina; (M.G.L.); (C.V.)
- National Scientific and Technical Research Council (CONICET), Buenos Aires C1425FQB, Argentina
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Li H, Chang L, Liu H, Li Y. Diverse factors influence the amounts of carbon input to soils via rhizodeposition in plants: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 948:174858. [PMID: 39034011 DOI: 10.1016/j.scitotenv.2024.174858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Revised: 07/15/2024] [Accepted: 07/16/2024] [Indexed: 07/23/2024]
Abstract
Rhizodeposition encompasses the intricate processes through which plants generate organic compounds via photosynthesis, store these compounds within aboveground biomass and roots through top-down transport, and subsequently release this organic matter into the soil. Rhizodeposition represents one of the carbon (C) cycle in soils that can achieve long-term organic C sequestration. This function holds significant implications for mitigating the climate change that partly stems from the greenhouse effect associated with increased atmospheric carbon dioxide levels. Therefore, it is essential to further understand how the process of rhizodeposition allocates the photosynthetic C that plants create via photosynthesis. While many studies have explored the basic principles of rhizodeposition, along with the associated impact on soil C storage, there is a palpable absence of comprehensive reviews that summarize the various factors influencing this process. This paper compiles and analyzes the literature on plant rhizodeposition to describe how rhizodeposition influences soil C storage. Moreover, the review summarizes the impacts of soil physicochemical, microbial, and environmental characteristics on plant rhizodeposition and priming effects, and concludes with recommendations for future research.
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Affiliation(s)
- Haoye Li
- College of Earth Sciences, Jilin University, Changchun 130061, China
| | - Lei Chang
- College of Earth Sciences, Jilin University, Changchun 130061, China
| | - Huijia Liu
- College of Earth Sciences, Jilin University, Changchun 130061, China
| | - Yuefen Li
- College of Earth Sciences, Jilin University, Changchun 130061, China.
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Zheng T, Hou J, Wu T, Jin H, Dai Y, Xu J, Yang K, Lin D. Ferric Oxide Nanomaterials and Plant-Rhizobacteria Symbionts Cogenerate Iron Plaque for Removing Highly Chlorinated Contaminants in Dryland Soils. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:11063-11073. [PMID: 38869036 DOI: 10.1021/acs.est.4c03133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2024]
Abstract
Rhizosphere iron plaques derived from Fe-based nanomaterials (NMs) are a promising tool for sustainable agriculture. However, the requirement for flooded conditions to generate iron plaque limits the scope of the NM application. In this study, we achieved in situ Fenton oxidation of a highly chlorinated persistent organic pollutant (2,2',4,5,5'-pentachlorobiphenyl, PCB101) through iron plaque mediated by the interaction between α-Fe2O3 NMs and plant-rhizobacteria symbionts under dryland conditions. Mechanistically, the coexistence of α-Fe2O3 NMs and Pseudomonas chlororaphis JD37 stimulated alfalfa roots to secrete acidic and reductive agents as well as H2O2, which together mediated the rhizosphere Fenton reaction and converted α-Fe2O3 NMs into iron plaque rich in Fe(II)-silicate. Further verifications reproduced the Fenton reaction in vitro using α-Fe2O3 NMs and rhizosphere compounds, confirming the critical role of •OH in the oxidative degradation of PCB101. Significant reductions in PCB101 content by 18.6%, 42.9%, and 23.2% were respectively found in stem, leaf, and soil after a 120-d treatment, proving the effectiveness of this NMs-plant-rhizobacteria technique for simultaneously safe crop production and soil remediation. These findings can help expand the potential applications of nanobio interaction and its mediated iron plaque generation for both agricultural practice and soil remediation.
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Affiliation(s)
- Tianying Zheng
- Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Department of Environmental Science, Zhejiang University, Hangzhou 310058, China
| | - Jie Hou
- Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Department of Environmental Science, Zhejiang University, Hangzhou 310058, China
| | - Ting Wu
- Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Department of Environmental Science, Zhejiang University, Hangzhou 310058, China
| | - Hui Jin
- Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Department of Environmental Science, Zhejiang University, Hangzhou 310058, China
| | - Yunbu Dai
- Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Department of Environmental Science, Zhejiang University, Hangzhou 310058, China
| | - Jiang Xu
- Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Department of Environmental Science, Zhejiang University, Hangzhou 310058, China
| | - Kun Yang
- Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Department of Environmental Science, Zhejiang University, Hangzhou 310058, China
| | - Daohui Lin
- Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Department of Environmental Science, Zhejiang University, Hangzhou 310058, China
- Zhejiang Ecological Civilization Academy, Anji 313300, China
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Sarenqimuge S, Wang Y, Alhussein M, Koopmann B, von Tiedemann A. The interplay of suppressive soil bacteria and plant root exudates determines germination of microsclerotia of Verticillium longisporum. Appl Environ Microbiol 2024; 90:e0058924. [PMID: 38814059 PMCID: PMC11218611 DOI: 10.1128/aem.00589-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Accepted: 05/03/2024] [Indexed: 05/31/2024] Open
Abstract
Dormant microsclerotia play a vital role in the survival and spread of Verticillium longisporum, as they can stay viable in the soil and maintain their infectivity for many years. In our previous work, we revealed that soil bacterial volatiles are a key inhibitory factor causing microsclerotia dormancy in the soil. In this study, we further demonstrate that root exudates collected from both host and non-host plants can effectively rescue microsclerotia from bacterial suppression and initiate germination. To identify the specific compounds in root exudates responsible for microsclerotia germination, we fractionated the collected root exudates into polar and non-polar compounds. Subsequently, we conducted comprehensive bioassays with each fraction on germination-suppressed microsclerotia. The result revealed a pivotal role of primary metabolites in root exudates, particularly glutamic acid, in triggering microsclerotia germination and overcoming bacterial inhibition. Moreover, our studies revealed a decrease in inhibitory bacterial volatile fatty acids when bacteria were cultured in the presence of root exudates or glutamic acid. This suggests a potential mechanism, by which root exudates set-off bacterial suppression on microsclerotia. Here, we reveal for the first time that plant root exudates, instead of directly inducing the germination of microsclerotia, enact a set-off effect by counteracting the suppressive impact of soil bacteria on the microsclerotia germination process. This nuanced interaction advances our understanding of the multifaceted dynamics governing microsclerotia dormancy and germination in the soil environment. IMPORTANCE Our research provides first-time insights into the crucial interaction between plant root exudates and soil bacteria in regulating the germination of Verticillium longisporum microsclerotia, a significant structure in the survival and proliferation of this soil-borne pathogen. We describe so far unknown mechanisms, which are key to understand how root infections on oilseed rape can occur. By pinpointing primary metabolites in root exudates as key factors in overcoming bacteria-induced dormancy and promote microsclerotia germination, our study highlights the potential for exploiting plant - as well as soil microbe-derived - compounds to control V. longisporum. This work underscores the importance of elucidating the nuanced interactions within the soil ecosystem to devise innovative strategies for managing root infective plant diseases, thereby contributing to the resilience and health of cropping systems.
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Affiliation(s)
- Sarenqimuge Sarenqimuge
- Plant Pathology and Plant Protection Division, Department of Crop Sciences, Faculty of Agriculture, Georg-August University Göttingen, Göttingen, Germany
| | - Yao Wang
- Plant Pathology and Plant Protection Division, Department of Crop Sciences, Faculty of Agriculture, Georg-August University Göttingen, Göttingen, Germany
| | - Mohammad Alhussein
- Agricultural Entomology Division, Department of Crop Sciences, Faculty of Agriculture, Georg-August University Göttingen, Göttingen, Germany
| | - Birger Koopmann
- Plant Pathology and Plant Protection Division, Department of Crop Sciences, Faculty of Agriculture, Georg-August University Göttingen, Göttingen, Germany
| | - Andreas von Tiedemann
- Plant Pathology and Plant Protection Division, Department of Crop Sciences, Faculty of Agriculture, Georg-August University Göttingen, Göttingen, Germany
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11
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Gamalero E, Glick BR. Use of plant growth-promoting bacteria to facilitate phytoremediation. AIMS Microbiol 2024; 10:415-448. [PMID: 38919713 PMCID: PMC11194615 DOI: 10.3934/microbiol.2024021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 05/31/2024] [Accepted: 06/04/2024] [Indexed: 06/27/2024] Open
Abstract
Here, phytoremediation studies of toxic metal and organic compounds using plants augmented with plant growth-promoting bacteria, published in the past few years, were summarized and reviewed. These studies complemented and extended the many earlier studies in this area of research. The studies summarized here employed a wide range of non-agricultural plants including various grasses indigenous to regions of the world. The plant growth-promoting bacteria used a range of different known mechanisms to promote plant growth in the presence of metallic and/or organic toxicants and thereby improve the phytoremediation ability of most plants. Both rhizosphere and endophyte PGPB strains have been found to be effective within various phytoremediation schemes. Consortia consisting of several PGPB were often more effective than individual PGPB in assisting phytoremediation in the presence of metallic and/or organic environmental contaminants.
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Affiliation(s)
- Elisa Gamalero
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale T. Michel 11, Alessandria, 15121, Italy
| | - Bernard R. Glick
- Department of Biology, University of Waterloo, Waterloo, ON, Canada N2L 3G1
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12
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Mohan I, Joshi B, Pathania D, Dhar S, Bhau BS. Phytobial remediation advances and application of omics and artificial intelligence: a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:37988-38021. [PMID: 38780844 DOI: 10.1007/s11356-024-33690-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Accepted: 05/11/2024] [Indexed: 05/25/2024]
Abstract
Industrialization and urbanization increased the use of chemicals in agriculture, vehicular emissions, etc., and spoiled all environmental sectors. It causes various problems among living beings at multiple levels and concentrations. Phytoremediation and microbial association are emerging as a potential method for removing heavy metals and other contaminants from soil. The treatment uses plant physiology and metabolism to remove or clean up various soil contaminants efficiently. In recent years, omics and artificial intelligence have been seen as powerful techniques for phytobial remediation. Recently, AI and modeling are used to analyze large data generated by omics technologies. Machine learning algorithms can be used to develop predictive models that can help guide the selection of the most appropriate plant and plant growth-promoting rhizobacteria combination that is most effective at remediation. In this review, emphasis is given to the phytoremediation techniques being explored worldwide in soil contamination.
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Affiliation(s)
- Indica Mohan
- Department of Environmental Sciences, Central University of Jammu, Rahya-Suchani, Bagla, District Samba, Jammu and Kashmir, 181143, India
- Department of Botany, Central University of Jammu, Rahya-Suchani, Bagla, District Samba, Jammu and Kashmir, 181143, India
| | - Babita Joshi
- Plant Molecular Genetics Laboratory, CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow, U.P., 226001, India
| | - Deepak Pathania
- Department of Environmental Sciences, Central University of Jammu, Rahya-Suchani, Bagla, District Samba, Jammu and Kashmir, 181143, India
- Department of Botany, Central University of Jammu, Rahya-Suchani, Bagla, District Samba, Jammu and Kashmir, 181143, India
| | - Sunil Dhar
- Department of Environmental Sciences, Central University of Jammu, Rahya-Suchani, Bagla, District Samba, Jammu and Kashmir, 181143, India
- Department of Botany, Central University of Jammu, Rahya-Suchani, Bagla, District Samba, Jammu and Kashmir, 181143, India
| | - Brijmohan Singh Bhau
- Department of Botany, Central University of Jammu, Rahya-Suchani, Bagla, District Samba, Jammu and Kashmir, 181143, India.
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13
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Cunha IDCMD, Silva AVRD, Boleta EHM, Pellegrinetti TA, Zagatto LFG, Zagatto SDSS, Chaves MGD, Mendes R, Patreze CM, Tsai SM, Mendes LW. The interplay between the inoculation of plant growth-promoting rhizobacteria and the rhizosphere microbiome and their impact on plant phenotype. Microbiol Res 2024; 283:127706. [PMID: 38574431 DOI: 10.1016/j.micres.2024.127706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 03/26/2024] [Accepted: 03/27/2024] [Indexed: 04/06/2024]
Abstract
Microbial inoculation stands as a pivotal strategy, fostering symbiotic relationships between beneficial microorganisms and plants, thereby enhancing nutrient uptake, bolstering resilience against environmental stressors, and ultimately promoting healthier and more productive plant growth. However, while the advantageous roles of inoculants are widely acknowledged, the precise and nuanced impacts of inoculation on the intricate interactions of the rhizosphere microbiome remain significantly underexplored. This study explores the impact of bacterial inoculation on soil properties, plant growth, and the rhizosphere microbiome. By employing various bacterial strains and a synthetic community (SynCom) as inoculants in common bean plants, the bacterial and fungal communities in the rhizosphere were assessed through 16 S rRNA and ITS gene sequencing. Concurrently, soil chemical parameters, plant traits, and gene expression were evaluated. The findings revealed that bacterial inoculation generally decreased pH and V%, while increasing H+Al and m% in the rhizosphere. It also decreased gene expression in plants related to detoxification, photosynthesis, and defense mechanisms, while enhancing bacterial diversity in the rhizosphere, potentially benefiting plant health. Specific bacterial strains showed varied impacts on rhizosphere microbiome assembly, predominantly affecting rhizospheric bacteria more than fungi, indirectly influencing soil conditions and plants. Notably, Paenibacillus polymyxa inoculation improved plant nitrogen (by 5.2%) and iron levels (by 28.1%), whereas Bacillus cereus boosted mycorrhization rates (by 70%). Additionally, inoculation led to increased complexity in network interactions within the rhizosphere (∼15%), potentially impacting plant health. Overall, the findings highlight the significant impact of introducing bacteria to the rhizosphere, enhancing nutrient availability, microbial diversity, and fostering beneficial plant-microbe interactions.
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Affiliation(s)
- Izadora de Cássia Mesquita da Cunha
- Cell and Molecular Biology Laboratory, Center for Nuclear Energy in Agriculture CENA, University of Sao Paulo USP, Piracicaba, SP 13416-000, Brazil; Luiz de Queiroz College of Agriculture ESALQ, University of São Paulo USP, Piracicaba, SP 13418-900, Brazil
| | - Ana Vitória Reina da Silva
- Cell and Molecular Biology Laboratory, Center for Nuclear Energy in Agriculture CENA, University of Sao Paulo USP, Piracicaba, SP 13416-000, Brazil
| | - Eduardo Henrique Marcandalli Boleta
- Cell and Molecular Biology Laboratory, Center for Nuclear Energy in Agriculture CENA, University of Sao Paulo USP, Piracicaba, SP 13416-000, Brazil
| | - Thierry Alexandre Pellegrinetti
- Cell and Molecular Biology Laboratory, Center for Nuclear Energy in Agriculture CENA, University of Sao Paulo USP, Piracicaba, SP 13416-000, Brazil
| | - Luis Felipe Guandalin Zagatto
- Cell and Molecular Biology Laboratory, Center for Nuclear Energy in Agriculture CENA, University of Sao Paulo USP, Piracicaba, SP 13416-000, Brazil; Department of Terrestrial Ecology, Netherlands Institute of Ecology NIOO-KNAW, Wageningen NL-6700 AB, the Netherlands
| | - Solange Dos Santos Silva Zagatto
- Cell and Molecular Biology Laboratory, Center for Nuclear Energy in Agriculture CENA, University of Sao Paulo USP, Piracicaba, SP 13416-000, Brazil
| | - Miriam Gonçalves de Chaves
- Cell and Molecular Biology Laboratory, Center for Nuclear Energy in Agriculture CENA, University of Sao Paulo USP, Piracicaba, SP 13416-000, Brazil
| | - Rodrigo Mendes
- Laboratory of Environmental Microbiology, Embrapa Environment, Jaguariuna 18020-000, Brazil
| | - Camila Maistro Patreze
- Institute of Biosciences, Federal University of the State of Rio de Janeiro, Rio de Janeiro, RJ 22290-240, Brazil
| | - Siu Mui Tsai
- Cell and Molecular Biology Laboratory, Center for Nuclear Energy in Agriculture CENA, University of Sao Paulo USP, Piracicaba, SP 13416-000, Brazil
| | - Lucas William Mendes
- Cell and Molecular Biology Laboratory, Center for Nuclear Energy in Agriculture CENA, University of Sao Paulo USP, Piracicaba, SP 13416-000, Brazil.
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14
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Du J, Xu B, Ma G, Ma L, Liang J, Li K, Jiao H, Tian B, Li B, Ma L. The impact of benzoic acid and lactic acid on the treatment efficiency and microbial community in the sulfur autotrophic denitrification process. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2024; 96:e11056. [PMID: 38825347 DOI: 10.1002/wer.11056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 04/26/2024] [Accepted: 05/11/2024] [Indexed: 06/04/2024]
Abstract
Nitrate poses a potential threat to aquatic ecosystems. This study focuses on the sulfur autotrophic denitrification mechanism in the process of water culture wastewater treatment, which has been successfully applied to the degradation of nitrogen in water culture farm effluents. However, the coexistence of organic acids in the treatment process is a common environmental challenge, significantly affecting the activity of denitrifying bacteria. This paper aims to explore the effects of adding benzoic acid and lactic acid on denitrification performance, organic acid removal rate, and microbial population abundance in sulfur autotrophic denitrification systems under optimal operating conditions, sulfur deficiency, and high hydraulic load. In experiments with 50 mg·L-1 of benzoic acid or lactic acid alone, the results show that benzoic acid and lactic acid have a stimulating effect on denitrification activity, with the stimulating effect significantly greater than the inhibitory effect. Under optimal operating conditions, the average denitrification rate of the system remained above 99%; under S/N = 1.5 conditions, the average denitrification rate increased from 88.34% to 91.93% and 85.91%; under HRT = 6 h conditions, the average denitrification rate increased from 75.25% to 97.79% and 96.58%. In addition, the addition of organic acids led to a decrease in microbial population abundance. At the phylum level, Proteobacteria has always been the dominant bacterial genus, and its relative abundance significantly increased after the addition of benzoic acid, from 40.2% to 61.5% and 62.4%. At the genus level, Thiobacillus, Sulfurimonas, Chryseobacterium, and Thermomonas maintained high population abundances under different conditions. PRACTITIONER POINTS: Employing autotrophic denitrification process for treating high-nitrate wastewater. Utilizing organic acids as external carbon sources. Denitrifying bacteria demonstrate high utilization efficiency towards organic acids. Organic acids promote denitrification more than they inhibit it. The promotion is manifested in the enhancement of activity and microbial abundance.
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Affiliation(s)
- Jiancheng Du
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, China
| | - Bing Xu
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, China
- Institute of Resources and Environment, Shandong Jianzhu University, Jinan, China
| | - Guangxiang Ma
- Shandong Environmental Science Society, Jinan, China
| | - Liang Ma
- Shandong Guochen Industrial Group Co., Ltd., Jinan, China
| | - Jinhao Liang
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, China
| | - Ke Li
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, China
| | - Hui Jiao
- Shandong Guochen Industrial Group Co., Ltd., Jinan, China
| | - Binbin Tian
- Shandong Guochen Industrial Group Co., Ltd., Jinan, China
| | - Bingxu Li
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, China
| | - Linfeng Ma
- School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, China
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15
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Keren G, Yehezkel G, Satish L, Adamov Z, Barak Z, Ben-Shabat S, Kagan-Zur V, Sitrit Y. Root-secreted nucleosides: signaling chemoattractants of rhizosphere bacteria. FRONTIERS IN PLANT SCIENCE 2024; 15:1388384. [PMID: 38799096 PMCID: PMC11120975 DOI: 10.3389/fpls.2024.1388384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Accepted: 04/09/2024] [Indexed: 05/29/2024]
Abstract
The rhizosphere is a complex ecosystem, consisting of a narrow soil zone influenced by plant roots and inhabited by soil-borne microorganisms. Plants actively shape the rhizosphere microbiome through root exudates. Some metabolites are signaling molecules specifically functioning as chemoattractants rather than nutrients. These elusive signaling molecules have been sought for several decades, and yet little progress has been made. Root-secreted nucleosides and deoxynucleosides were detected in exudates of various plants by targeted ultra-performance liquid chromatography-mass spectrometry/mass spectrometry. Rhizobacteria were isolated from the roots of Helianthemum sessiliflorum carrying the mycorrhizal desert truffle Terfezia boudieri. Chemotaxis was determined by a glass capillary assay or plate assays on semisolid agar and through a soil plate assay. Nucleosides were identified in root exudates of plants that inhabit diverse ecological niches. Nucleosides induced positive chemotaxis in plant beneficial bacteria Bacillus pumilus, Bacillus subtilis, Pseudomonas turukhanskensis spp., Serratia marcescens, and the pathogenic rhizobacterium Xanthomonas campestris and E coli. In a soil plate assay, nucleosides diffused to substantial distances and evoked chemotaxis under conditions as close as possible to natural environments. This study implies that root-secreted nucleosides are involved in the assembly of the rhizosphere bacterial community by inducing chemotaxis toward plant roots. In animals, nucleoside secretion known as "purinergic signaling" is involved in communication between cells, physiological processes, diseases, phagocytic cell migration, and bacterial activity. The coliform bacterium E. coli that inhabits the lower intestine of warm-blooded organisms also attracted to nucleosides, implying that nucleosides may serve as a common signal for bacterial species inhabiting distinct habitats. Taken together, all these may indicate that chemotaxis signaling by nucleosides is a conserved universal mechanism that encompasses living kingdoms and environments and should be given further attention in plant rhizosphere microbiome research.
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Affiliation(s)
- Guy Keren
- The Jacob Blaustein Institute for Desert Research, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Galit Yehezkel
- The Jacob Blaustein Institute for Desert Research, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Lakkakula Satish
- The Jacob Blaustein Institute for Desert Research, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Zahar Adamov
- The Jacob Blaustein Institute for Desert Research, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Ze’ev Barak
- Department of Life Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Shimon Ben-Shabat
- Department of Clinical Biochemistry and Pharmacology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Varda Kagan-Zur
- Department of Life Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Yaron Sitrit
- The Jacob Blaustein Institute for Desert Research, Ben-Gurion University of the Negev, Beer-Sheva, Israel
- Katif Research Center for Research & Development, Netivot, Israel
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16
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Agarwal P, Vibhandik R, Agrahari R, Daverey A, Rani R. Role of Root Exudates on the Soil Microbial Diversity and Biogeochemistry of Heavy Metals. Appl Biochem Biotechnol 2024; 196:2673-2693. [PMID: 37191824 DOI: 10.1007/s12010-023-04465-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/15/2023] [Indexed: 05/17/2023]
Abstract
Due to extensive industrialization and escalation in pollution, the world is facing problems related to soil heavy metal pollution. The traditional ways of soil remediation are neither feasible nor cost-effective in most of the real-world scenarios, where metal concentration is relatively low in soil. Therefore, phytoremediation using plants and plant secretions to remediate heavy metal-contaminated soil is recently getting more attention. The plant root exudates act as an ecological driver in the rhizospheric region where they influence and guide the microbial community to function in such a way that can be advantageous for plant growth. They also promote phytoremediation process by altering the bioavailability of pollutants in soil. Root exudates affect the biogeochemical properties of heavy metals as well. In this review, existing literature on the role of root exudates (natural as well as artificial) on the phytoremediation of heavy metal-contaminated (particularly lead) soil is reviewed. The effect of root exudates on the biogeochemistry of lead in soil is also discussed.
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Affiliation(s)
- Priyanka Agarwal
- Department of Biotechnology, Motilal Nehru National Institute of Technology Allahabad, Prayagraj, Teliyarganj, Uttar Pradesh, 211004, India
| | - Rutuja Vibhandik
- Department of Biotechnology, Motilal Nehru National Institute of Technology Allahabad, Prayagraj, Teliyarganj, Uttar Pradesh, 211004, India
| | - Roma Agrahari
- Department of Biochemical Engineering, Harcourt Butler Technical University, Kanpur, Uttar Pradesh, 208002, India
| | - Achlesh Daverey
- School of Environment and Natural Resources, Doon University, Dehradun, Uttarakhand, 248001, India
| | - Radha Rani
- Department of Biotechnology, Motilal Nehru National Institute of Technology Allahabad, Prayagraj, Teliyarganj, Uttar Pradesh, 211004, India.
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17
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Zhuang Y, Wang H, Tan F, Wu B, Liu L, Qin H, Yang Z, He M. Rhizosphere metabolic cross-talk from plant-soil-microbe tapping into agricultural sustainability: Current advance and perspectives. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 210:108619. [PMID: 38604013 DOI: 10.1016/j.plaphy.2024.108619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 03/21/2024] [Accepted: 04/08/2024] [Indexed: 04/13/2024]
Abstract
Rhizosphere interactions from plant-soil-microbiome occur dynamically all the time in the "black microzone" underground, where we can't see intuitively. Rhizosphere metabolites including root exudates and microbial metabolites act as various chemical signalings involving in rhizosphere interactions, and play vital roles on plant growth, development, disease suppression and resistance to stress conditions as well as proper soil health. Although rhizosphere metabolites are a mixture from plant roots and soil microbes, they often are discussed alone. As a rapid appearance of various omics platforms and analytical methods, it offers possibilities and opportunities for exploring rhizosphere interactions in unprecedented breadth and depth. However, our comprehensive understanding about the fine-tuning mechanisms of rhizosphere interactions mediated by these chemical compounds still remain clear. Thus, this review summarizes recent advances systemically including the features of rhizosphere metabolites and their effects on rhizosphere ecosystem, and looks forward to the future research perspectives, which contributes to facilitating better understanding of biochemical communications belowground and helping identify novel rhizosphere metabolites. We also address challenges for promoting the understanding about the roles of rhizosphere metabolites in different environmental stresses.
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Affiliation(s)
- Yong Zhuang
- Biogas Institute of Ministry of Agriculture and Rural Affairs, Chinese Academy of Agricultural Sciences, 610041, Chengdu, China.
| | - Hao Wang
- Biogas Institute of Ministry of Agriculture and Rural Affairs, Chinese Academy of Agricultural Sciences, 610041, Chengdu, China
| | - Furong Tan
- Biogas Institute of Ministry of Agriculture and Rural Affairs, Chinese Academy of Agricultural Sciences, 610041, Chengdu, China
| | - Bo Wu
- Biogas Institute of Ministry of Agriculture and Rural Affairs, Chinese Academy of Agricultural Sciences, 610041, Chengdu, China
| | - Linpei Liu
- Biogas Institute of Ministry of Agriculture and Rural Affairs, Chinese Academy of Agricultural Sciences, 610041, Chengdu, China
| | - Han Qin
- Biogas Institute of Ministry of Agriculture and Rural Affairs, Chinese Academy of Agricultural Sciences, 610041, Chengdu, China
| | - ZhiJuan Yang
- Biogas Institute of Ministry of Agriculture and Rural Affairs, Chinese Academy of Agricultural Sciences, 610041, Chengdu, China
| | - Mingxiong He
- Biogas Institute of Ministry of Agriculture and Rural Affairs, Chinese Academy of Agricultural Sciences, 610041, Chengdu, China.
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18
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Bas TG, Sáez ML, Sáez N. Sustainable Development versus Extractivist Deforestation in Tropical, Subtropical, and Boreal Forest Ecosystems: Repercussions and Controversies about the Mother Tree and the Mycorrhizal Network Hypothesis. PLANTS (BASEL, SWITZERLAND) 2024; 13:1231. [PMID: 38732447 PMCID: PMC11085170 DOI: 10.3390/plants13091231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 04/23/2024] [Accepted: 04/28/2024] [Indexed: 05/13/2024]
Abstract
This research reviews the phenomenon of extractive deforestation as a possible trigger for cascade reactions that could affect part of the forest ecosystem and its biodiversity (surface, aerial, and underground) in tropical, subtropical, and boreal forests. The controversy and disparities in criteria generated in the international scientific community around the hypothesis of a possible link between "mother trees" and mycorrhizal networks in coopetition for nutrients, nitrogen, and carbon are analyzed. The objective is to promote awareness to generate more scientific knowledge about the eventual impacts of forest extraction. Public policies are emphasized as crucial mediators for balanced sustainable development. Currently, the effects of extractive deforestation on forest ecosystems are poorly understood, which requires caution and forest protection. Continued research to increase our knowledge in molecular biology is advocated to understand the adaptation of biological organisms to the new conditions of the ecosystem both in the face of extractive deforestation and reforestation. The environmental impacts of extractive deforestation, such as the loss of biodiversity, soil degradation, altered water cycles, and the contribution of climate change, remain largely unknown. Long-term and high-quality research is essential to ensure forest sustainability and the preservation of biodiversity for future generations.
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Affiliation(s)
- Tomas Gabriel Bas
- Escuela de Ciencias Empresariales, Universidad Católica del Norte, Coquimbo 1780000, Chile;
| | - Mario Luis Sáez
- Facultad de Humanidades, La Serena University, Coquimbo 1700000, Chile;
| | - Nicolas Sáez
- Escuela de Ciencias Empresariales, Universidad Católica del Norte, Coquimbo 1780000, Chile;
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19
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Eroğlu ÇG, Bennett AA, Steininger-Mairinger T, Hann S, Puschenreiter M, Wirth J, Gfeller A. Neighbour-induced changes in root exudation patterns of buckwheat results in altered root architecture of redroot pigweed. Sci Rep 2024; 14:8679. [PMID: 38622223 PMCID: PMC11018816 DOI: 10.1038/s41598-024-58687-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Accepted: 04/02/2024] [Indexed: 04/17/2024] Open
Abstract
Roots are crucial in plant adaptation through the exudation of various compounds which are influenced and modified by environmental factors. Buckwheat root exudate and root system response to neighbouring plants (buckwheat or redroot pigweed) and how these exudates affect redroot pigweed was investigated. Characterising root exudates in plant-plant interactions presents challenges, therefore a split-root system which enabled the application of differential treatments to parts of a single root system and non-destructive sampling was developed. Non-targeted metabolome profiling revealed that neighbour presence and identity induces systemic changes. Buckwheat and redroot pigweed neighbour presence upregulated 64 and 46 metabolites, respectively, with an overlap of only 7 metabolites. Root morphology analysis showed that, while the presence of redroot pigweed decreased the number of root tips in buckwheat, buckwheat decreased total root length and volume, surface area, number of root tips, and forks of redroot pigweed. Treatment with exudates (from the roots of buckwheat and redroot pigweed closely interacting) on redroot pigweed decreased the total root length and number of forks of redroot pigweed seedlings when compared to controls. These findings provide understanding of how plants modify their root exudate composition in the presence of neighbours and how this impacts each other's root systems.
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Affiliation(s)
- Çağla Görkem Eroğlu
- Herbology in Field Crops, Plant Production Systems, Agroscope, Nyon, Switzerland
| | - Alexandra A Bennett
- Department of Chemistry, Institute of Analytical Chemistry, University of Natural Resources and Life Sciences, Vienna (BOKU), 1190, Vienna, Austria
| | - Teresa Steininger-Mairinger
- Department of Chemistry, Institute of Analytical Chemistry, University of Natural Resources and Life Sciences, Vienna (BOKU), 1190, Vienna, Austria
| | - Stephan Hann
- Department of Chemistry, Institute of Analytical Chemistry, University of Natural Resources and Life Sciences, Vienna (BOKU), 1190, Vienna, Austria
| | - Markus Puschenreiter
- Department of Forest and Soil Sciences, Institute of Soil Research, Rhizosphere Ecology & Biogeochemistry Group, University of Natural Resources and Life Sciences, Vienna, Konrad-Lorenz-Strasse 24, 3430, Tulln, Austria
| | - Judith Wirth
- Herbology in Field Crops, Plant Production Systems, Agroscope, Nyon, Switzerland
| | - Aurélie Gfeller
- Herbology in Field Crops, Plant Production Systems, Agroscope, Nyon, Switzerland.
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20
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Yue C, Du C, Wang X, Tan Y, Liu X, Fan H. Powdery mildew-induced changes in phyllosphere microbial community dynamics of cucumber. FEMS Microbiol Ecol 2024; 100:fiae050. [PMID: 38599637 PMCID: PMC11062426 DOI: 10.1093/femsec/fiae050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 02/22/2024] [Accepted: 04/09/2024] [Indexed: 04/12/2024] Open
Abstract
As an important habitat for microorganisms, the phyllosphere has a great impact on plant growth and health, and changes in phyllosphere microorganisms are closely related to the occurrence of leaf diseases. However, there remains a limited understanding regarding alterations to the microbial community in the phyllosphere resulting from pathogen infections. Here, we analyzed and compared the differences in phyllosphere microorganisms of powdery mildew cucumber from three disease severity levels (0% < L1 < 30%, 30% ≤ L2 < 50%, L3 ≥ 50%, the number represents the lesion coverage rate of powdery mildew on leaves). There were significant differences in α diversity and community structure of phyllosphere communities under different disease levels. Disease severity altered the community structure of phyllosphere microorganisms, Rosenbergiella, Rickettsia, and Cladosporium accounted for the largest proportion in the L1 disease grade, while Bacillus, Pantoea, Kocuria, and Podosphaera had the highest relative abundance in the L3 disease grade. The co-occurrence network analysis of the phyllosphere microbial community indicated that the phyllosphere bacterial community was most affected by the severity of disease. Our results suggested that with the development of cucumber powdery mildew, the symbiotic relationship between species was broken, and the entire bacterial community tended to compete.
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Affiliation(s)
- Cong Yue
- Collaborative Innovation Center for Efficient and Green Production of Agriculture in Mountainous Areas of Zhejiang Province, Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, College of Horticulture Science, Zhejiang A and F University, Hangzhou, Zhejiang 311300, China
| | - Changxia Du
- Collaborative Innovation Center for Efficient and Green Production of Agriculture in Mountainous Areas of Zhejiang Province, Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, College of Horticulture Science, Zhejiang A and F University, Hangzhou, Zhejiang 311300, China
| | - Xiaodan Wang
- Collaborative Innovation Center for Efficient and Green Production of Agriculture in Mountainous Areas of Zhejiang Province, Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, College of Horticulture Science, Zhejiang A and F University, Hangzhou, Zhejiang 311300, China
| | - Yinqing Tan
- Collaborative Innovation Center for Efficient and Green Production of Agriculture in Mountainous Areas of Zhejiang Province, Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, College of Horticulture Science, Zhejiang A and F University, Hangzhou, Zhejiang 311300, China
| | - Xingchen Liu
- Collaborative Innovation Center for Efficient and Green Production of Agriculture in Mountainous Areas of Zhejiang Province, Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, College of Horticulture Science, Zhejiang A and F University, Hangzhou, Zhejiang 311300, China
| | - Huaifu Fan
- Collaborative Innovation Center for Efficient and Green Production of Agriculture in Mountainous Areas of Zhejiang Province, Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, College of Horticulture Science, Zhejiang A and F University, Hangzhou, Zhejiang 311300, China
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21
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Laftouhi A, Mahraz MA, Hmamou A, Assouguem A, Ullah R, Bari A, Lahlali R, Ercisli S, Kaur S, Idrissi AM, Eloutassi N, Rais Z, Taleb A, Taleb M. Analysis of Primary and Secondary Metabolites, Physical Properties, Antioxidant and Antidiabetic Activities, and Chemical Composition of Rosmarinus officinalis Essential Oils under Differential Water Stress Conditions. ACS OMEGA 2024; 9:16656-16664. [PMID: 38617605 PMCID: PMC11007863 DOI: 10.1021/acsomega.4c00653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 03/09/2024] [Accepted: 03/13/2024] [Indexed: 04/16/2024]
Abstract
This study investigated the effects of varying water stress levels on Rosmarinus officinalis essential oils (EO). Three samples (S1, S2, and S3) were cultivated under different stress levels (40, 60, and 80%). Increased water stress led to changes in primary and secondary metabolites, EO contents, and physical properties. Antioxidant activity varied, with S2 exhibiting the highest IC50 value. In terms of antidiabetic activity, S2 showed robust α-amylase inhibition, while S3 displayed a commendable influence. For α-galactosidase inhibition, S3 had a moderate effect, and S2 stood out with increased efficacy. Gas chromatography-mass spectrometry analysis revealed stress-induced changes in major compounds. The study enhances the understanding of plant responses to water stress, with potential applications in antioxidant therapy and diabetes management. The findings emphasize the importance of sustainable water management for optimizing the EO quality in its various uses.
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Affiliation(s)
- Abdelouahid Laftouhi
- Laboratory
of Electrochemistry, Modeling and Environment Engineering (LIEME)
Faculty of Sciences Fes, Sidi Mohamed Ben
Abdellah University, Fez 30000, Morocco
| | - Mohamed Adil Mahraz
- Laboratory
of Electrochemistry, Modeling and Environment Engineering (LIEME)
Faculty of Sciences Fes, Sidi Mohamed Ben
Abdellah University, Fez 30000, Morocco
| | - Anouar Hmamou
- Laboratory
of Electrochemistry, Modeling and Environment Engineering (LIEME)
Faculty of Sciences Fes, Sidi Mohamed Ben
Abdellah University, Fez 30000, Morocco
| | - Amine Assouguem
- Department
of Plant Protection and Environment, École
Nationale d’Agriculture de Meknès, Km.10, Route Haj Kaddour, B.P.S/40, Meknes 50001, Morocco
- Laboratory
of Functional Ecology and Environment, Faculty of Sciences and Technology, Sidi Mohamed Ben Abdellah University, Imouzzer Street, P.O. Box 2202, Fez 30000, Morocco
| | - Riaz Ullah
- Department
of Pharmacognosy, College of Pharmacy, King
Saud University, Riyadh 11451, Saudi Arabia
| | - Ahmed Bari
- Department
of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Rachid Lahlali
- Department
of Plant Protection and Environment, École
Nationale d’Agriculture de Meknès, Km.10, Route Haj Kaddour, B.P.S/40, Meknes 50001, Morocco
| | - Sezai Ercisli
- Department
of Horticulture, Faculty of Agriculture, Ataturk University, Erzurum 25240, Turkey
| | - Sawinder Kaur
- Department
of Food Technology and Nutrition, School of Agriculture, Lovely Professional University, Phagwara, Punjab 144411, India
| | - Amine Mounadi Idrissi
- Laboratory
of Electrochemistry, Modeling and Environment Engineering (LIEME)
Faculty of Sciences Fes, Sidi Mohamed Ben
Abdellah University, Fez 30000, Morocco
| | - Noureddine Eloutassi
- Laboratory
of Electrochemistry, Modeling and Environment Engineering (LIEME)
Faculty of Sciences Fes, Sidi Mohamed Ben
Abdellah University, Fez 30000, Morocco
| | - Zakia Rais
- Laboratory
of Electrochemistry, Modeling and Environment Engineering (LIEME)
Faculty of Sciences Fes, Sidi Mohamed Ben
Abdellah University, Fez 30000, Morocco
| | - Abdslam Taleb
- Environmental
Process Engineering Laboratory-Faculty of Science and Technology Mohammedia, Hassan II University of Casablanca, Casablanca 20000, Morocco
| | - Mustapha Taleb
- Laboratory
of Electrochemistry, Modeling and Environment Engineering (LIEME)
Faculty of Sciences Fes, Sidi Mohamed Ben
Abdellah University, Fez 30000, Morocco
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22
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Ullah A, Gao D, Wu F. Common mycorrhizal network: the predominant socialist and capitalist responses of possible plant-plant and plant-microbe interactions for sustainable agriculture. Front Microbiol 2024; 15:1183024. [PMID: 38628862 PMCID: PMC11020090 DOI: 10.3389/fmicb.2024.1183024] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Accepted: 02/05/2024] [Indexed: 04/19/2024] Open
Abstract
Plants engage in a variety of interactions, including sharing nutrients through common mycorrhizal networks (CMNs), which are facilitated by arbuscular mycorrhizal fungi (AMF). These networks can promote the establishment, growth, and distribution of limited nutrients that are important for plant growth, which in turn benefits the entire network of plants. Interactions between plants and microbes in the rhizosphere are complex and can either be socialist or capitalist in nature, and the knowledge of these interactions is equally important for the progress of sustainable agricultural practice. In the socialist network, resources are distributed more evenly, providing benefits for all connected plants, such as symbiosis. For example, direct or indirect transfer of nutrients to plants, direct stimulation of growth through phytohormones, antagonism toward pathogenic microorganisms, and mitigation of stresses. For the capitalist network, AMF would be privately controlled for the profit of certain groups of plants, hence increasing competition between connected plants. Such plant interactions invading by microbes act as saprophytic and cause necrotrophy in the colonizing plants. In the first case, an excess of the nutritional resources may be donated to the receiver plants by direct transfer. In the second case, an unequal distribution of resources occurs, which certainly favor individual groups and increases competition between interactions. This largely depends on which of these responses is predominant ("socialist" or "capitalist") at the moment plants are connected. Therefore, some plant species might benefit from CMNs more than others, depending on the fungal species and plant species involved in the association. Nevertheless, benefits and disadvantages from the interactions between the connected plants are hard to distinguish in nature once most of the plants are colonized simultaneously by multiple fungal species, each with its own cost-benefits. Classifying plant-microbe interactions based on their habitat specificity, such as their presence on leaf surfaces (phyllospheric), within plant tissues (endophytic), on root surfaces (rhizospheric), or as surface-dwelling organisms (epiphytic), helps to highlight the dense and intricate connections between plants and microbes that occur both above and below ground. In these complex relationships, microbes often engage in mutualistic interactions where both parties derive mutual benefits, exemplifying the socialistic or capitalistic nature of these interactions. This review discusses the ubiquity, functioning, and management interventions of different types of plant-plant and plant-microbe interactions in CMNs, and how they promote plant growth and address environmental challenges for sustainable agriculture.
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Affiliation(s)
- Asad Ullah
- Department of Horticulture, Northeast Agricultural University, Harbin, China
| | - Danmei Gao
- Department of Horticulture, Northeast Agricultural University, Harbin, China
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Northeast Region), Ministry of Agriculture and Rural Affairs, Northeast Agricultural University, Harbin, China
| | - Fengzhi Wu
- Department of Horticulture, Northeast Agricultural University, Harbin, China
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Northeast Region), Ministry of Agriculture and Rural Affairs, Northeast Agricultural University, Harbin, China
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Wang FP, Wang JF, He T, Tian P, Song XQ, Li QS. Urea reduces the sustainability of soil Cd immobilization by upregulating the expression of AmSTOP1 and AmMATE genes in edible amaranth roots. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 345:123505. [PMID: 38325515 DOI: 10.1016/j.envpol.2024.123505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 01/18/2024] [Accepted: 02/03/2024] [Indexed: 02/09/2024]
Abstract
After cadmium (Cd) immobilization remediation in contaminated farmland soil, which forms of nitrogen fertilizer should be implemented to keep its sustainability? Urea and nitrate were used to compare for their effects on the remobilization of stabilized Cd in the rhizosphere soil of edible amaranth at nitrogen concentrations of 60, 95, and 130 mg kg-1. The results showed that compared to nitrate nitrogen, the Cd content in shoots increased by 76.2%, 65.6%, and 148% after applying three different concentrations of urea, and the total remobilization amount of Cd also increased by 16.0%, 24.9%, and 14.0% respectively. Urea application promotes root secretion of citric acid, malic acid, pyruvate, and γ-aminobutyric acid, crucial in remobilizing stable Cd. The application of urea promoted the expression of genes involved in sucrose transport, glycolysis, the TCA cycle, amino acid secretion, citric acid efflux, and proton efflux. Arabidopsis heterologous expression and yeast one-hybrid assays identify critical roles of AmMATE42 and AmMATE43 in citric acid and fumaric acid efflux, with AmSTOP1 activating their transcription. Inhibition of SIZ1 expression in urea treatment reduce AmSTOP1 SUMOylation, leading to increased expression of AmMATE42 and AmMATE43 and enhanced organic acids efflux. Using edible amaranth as a model vegetable, we discovered that urea is not beneficial to preserving the sustainability of stabilized Cd during the reuse of remediated farmlands contaminated with Cd.
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Affiliation(s)
- Fo-Peng Wang
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou, 510632, China
| | - Jun-Feng Wang
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou, 510632, China
| | - Tao He
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou, 510632, China
| | - Ping Tian
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou, 510632, China
| | - Xiao-Qian Song
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou, 510632, China
| | - Qu-Sheng Li
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou, 510632, China.
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24
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Yang Z, Zhao T, Cheng H, Yang J. Microbiome-enabled genomic selection improves prediction accuracy for nitrogen-related traits in maize. G3 (BETHESDA, MD.) 2024; 14:jkad286. [PMID: 38113533 PMCID: PMC11090461 DOI: 10.1093/g3journal/jkad286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 05/19/2023] [Accepted: 12/05/2023] [Indexed: 12/21/2023]
Abstract
Root-associated microbiomes in the rhizosphere (rhizobiomes) are increasingly known to play an important role in nutrient acquisition, stress tolerance, and disease resistance of plants. However, it remains largely unclear to what extent these rhizobiomes contribute to trait variation for different genotypes and if their inclusion in the genomic selection protocol can enhance prediction accuracy. To address these questions, we developed a microbiome-enabled genomic selection method that incorporated host SNPs and amplicon sequence variants from plant rhizobiomes in a maize diversity panel under high and low nitrogen (N) field conditions. Our cross-validation results showed that the microbiome-enabled genomic selection model significantly outperformed the conventional genomic selection model for nearly all time-series traits related to plant growth and N responses, with an average relative improvement of 3.7%. The improvement was more pronounced under low N conditions (8.4-40.2% of relative improvement), consistent with the view that some beneficial microbes can enhance N nutrient uptake, particularly in low N fields. However, our study could not definitively rule out the possibility that the observed improvement is partially due to the amplicon sequence variants being influenced by microenvironments. Using a high-dimensional mediation analysis method, our study has also identified microbial mediators that establish a link between plant genotype and phenotype. Some of the detected mediator microbes were previously reported to promote plant growth. The enhanced prediction accuracy of the microbiome-enabled genomic selection models, demonstrated in a single environment, serves as a proof-of-concept for the potential application of microbiome-enabled plant breeding for sustainable agriculture.
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Affiliation(s)
- Zhikai Yang
- Department of Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
- Center for Plant Science Innovation, University of Nebraska-Lincoln, Lincoln, NE 68583, USA
| | - Tianjing Zhao
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE 68583, USA
- Department of Animal Science, University of California Davis, Davis, CA 95616, USA
| | - Hao Cheng
- Department of Animal Science, University of California Davis, Davis, CA 95616, USA
| | - Jinliang Yang
- Department of Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
- Center for Plant Science Innovation, University of Nebraska-Lincoln, Lincoln, NE 68583, USA
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25
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Mathur J, Panwar R. Synergistic effect of pyrene and heavy metals (Zn, Pb, and Cd) on phytoremediation potential of Medicago sativa L. (alfalfa) in multi-contaminated soil. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:21012-21027. [PMID: 38383928 DOI: 10.1007/s11356-024-32499-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Accepted: 02/12/2024] [Indexed: 02/23/2024]
Abstract
The environment in India is contaminated with polycyclic aromatic hydrocarbons (PAHs) due to the occurrence of large anthropogenic activities, i.e., fuel combustion, mineral roasting, and biomass burning. Hence, 13 toxic PAHs were detected: phenanthrene, anthracene, fluoranthene, pyrene, and benz(a) anthracene, ben-zo; (b) fluoranthene, benzo(k) fluoranthene, benzo(a) pyrene, benzo(ghi)perylene, dibenz (ah) anthracene, indeno1,2,3-(cd) pyrene, coronene and coronene in the environment (i.e., ambient particulate matter, road dust, sludge, and sewage) of the most industrialized area. Pollutants such as heavy metals and polycyclic aromatic hydrocarbons co-contaminate the soil and pose a significant hazard to the ecosystem because these pollutants are harmful to both humans and the environment. Phytoremediation is an economical plant-based natural approach for soil clean-up that has no negative impact on ecosystems. The aim of this study was to investigate the effects of pyrene (500 mg kg-1), Zn (150 mg kg-1), Pb (150 mg kg-1), and Cd (150 mg kg-1) alone and in combination on the phytoextraction efficiency of Medicago sativa growing in contaminated soil. Plant biomass, biochemical activities, translocation factors, accumulation of heavy metals, and pyrene removal were determined. After 60 days of planting, compared with those of the control plants, the growth parameters, biomass, and chlorophyll content of the M. sativa plants were significantly lower, and the reactive oxygen species activity, such as proline and polyphenol content and metallothionein protein content, was markedly greater in the pyrene and heavy metal-polluted soils. Furthermore, the combined toxicity of pyrene and all three metals on M. sativa growth and biochemical parameters was significantly greater than that of pyrene, Zn, Pb, or Cd alone, indicating the synergistic effect of pyrene and heavy metals on cytotoxicity. Pyrene stress increased Cd accumulation in M. sativa. After pyrene exposure alone or in combination with Zn-pyrene, a greater pyrene removal rate (85.5-81.44%) was observed than that in Pb-pyrene, Cd-pyrene, and Zn-Pb-Cd-pyrene polluted soils (62.78-71.27%), indicating that zinc can enhance the removal of pyrene from contaminated soil. The resulting hypotheses demonstrated that Medicago sativa can be used as a promising phytoremediation agent for co-contaminated soil.
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Affiliation(s)
- Jyoti Mathur
- Department of Bioscience and Biotechnology, Banasthali Vidyapith, Rajasthan, India.
| | - Ritu Panwar
- Department of Bioscience and Biotechnology, Banasthali Vidyapith, Rajasthan, India
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26
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Afkairin A, Dixon MM, Buchanan C, Ippolito JA, Manter DK, Davis JG, Vivanco JM. Harnessing Phosphorous (P) Fertilizer-Insensitive Bacteria to Enhance Rhizosphere P Bioavailability in Legumes. Microorganisms 2024; 12:353. [PMID: 38399758 PMCID: PMC10892362 DOI: 10.3390/microorganisms12020353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 01/31/2024] [Accepted: 02/03/2024] [Indexed: 02/25/2024] Open
Abstract
Phosphorous (P) is widely used in agriculture; yet, P fertilizers are a nonrenewable resource. Thus, mechanisms to improve soil P bioavailability need to be found. Legumes are efficient in P acquisition and, therefore, could be used to develop new technologies to improve soil P bioavailability. Here, we studied different species and varieties of legumes and their rhizosphere microbiome responses to low-P stress. Some varieties of common beans, cowpeas, and peas displayed a similar biomass with and without P fertilization. The rhizosphere microbiome of those varieties grown without P was composed of unique microbes displaying different levels of P solubilization and mineralization. When those varieties were amended with P, some of the microbes involved in P solubilization and mineralization decreased in abundance, but other microbes were insensitive to P fertilization. The microbes that decreased in abundance upon P fertilization belonged to groups that are commonly used as biofertilizers such as Pseudomonas and Azospirillum. The microbes that were not affected by P fertilization constitute unique species involved in P mineralization such as Arenimonas daejeonensis, Hyphomicrobium hollandicum, Paenibacillus oenotherae, and Microlunatus speluncae. These P-insensitive microbes could be used to optimize P utilization and drive future sustainable agricultural practices to reduce human dependency on a nonrenewable resource.
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Affiliation(s)
- Antisar Afkairin
- Department of Horticulture and Landscape Architecture, Colorado State University, Fort Collins, CO 80523, USA; (A.A.); (M.M.D.)
| | - Mary M. Dixon
- Department of Horticulture and Landscape Architecture, Colorado State University, Fort Collins, CO 80523, USA; (A.A.); (M.M.D.)
| | - Cassidy Buchanan
- Department of Soil and Crop Sciences, Colorado State University, Fort Collins, CO 80523, USA; (C.B.); (J.A.I.)
| | - James A. Ippolito
- Department of Soil and Crop Sciences, Colorado State University, Fort Collins, CO 80523, USA; (C.B.); (J.A.I.)
- School of Environment and Natural Resources, The Ohio State University, Columbus, OH 43210, USA
| | - Daniel K. Manter
- Agricultural Research Service, United States Department of Agriculture, Fort Collins, CO 80526, USA;
| | - Jessica G. Davis
- Agricultural Experiment Station, Colorado State University, Fort Collins, CO 80523, USA
| | - Jorge M. Vivanco
- Department of Horticulture and Landscape Architecture, Colorado State University, Fort Collins, CO 80523, USA; (A.A.); (M.M.D.)
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27
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Määttä T, Malhotra A. The hidden roots of wetland methane emissions. GLOBAL CHANGE BIOLOGY 2024; 30:e17127. [PMID: 38337165 DOI: 10.1111/gcb.17127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 11/24/2023] [Accepted: 12/02/2023] [Indexed: 02/12/2024]
Abstract
Wetlands are the largest natural source of methane (CH4 ) globally. Climate and land use change are expected to alter CH4 emissions but current and future wetland CH4 budgets remain uncertain. One important predictor of wetland CH4 flux, plants, play an important role in providing substrates for CH4 -producing microbes, increasing CH4 consumption by oxygenating the rhizosphere, and transporting CH4 from soils to the atmosphere. Yet, there remain various mechanistic knowledge gaps regarding the extent to which plant root systems and their traits influence wetland CH4 emissions. Here, we present a novel conceptual framework of the relationships between a range of root traits and CH4 processes in wetlands. Based on a literature review, we propose four main CH4 -relevant categories of root function: gas transport, carbon substrate provision, physicochemical influences and root system architecture. Within these categories, we discuss how individual root traits influence CH4 production, consumption, and transport (PCT). Our findings reveal knowledge gaps concerning trait functions in physicochemical influences, and the role of mycorrhizae and temporal root dynamics in PCT. We also identify priority research needs such as integrating trait measurements from different root function categories, measuring root-CH4 linkages along environmental gradients, and following standardized root ecology protocols and vocabularies. Thus, our conceptual framework identifies relevant belowground plant traits that will help improve wetland CH4 predictions and reduce uncertainties in current and future wetland CH4 budgets.
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Affiliation(s)
- Tiia Määttä
- Department of Geography, University of Zürich, Zürich, Switzerland
| | - Avni Malhotra
- Department of Geography, University of Zürich, Zürich, Switzerland
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, Washington, USA
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28
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Quattrone A, Lopez-Guerrero M, Yadav P, Meier MA, Russo SE, Weber KA. Interactions between root hairs and the soil microbial community affect the growth of maize seedlings. PLANT, CELL & ENVIRONMENT 2024; 47:611-628. [PMID: 37974552 DOI: 10.1111/pce.14755] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 09/01/2023] [Accepted: 10/18/2023] [Indexed: 11/19/2023]
Abstract
Root hairs are considered important for rhizosphere formation, which affects root system functioning. Through interactions with soil microorganisms mediated by root exudation, root hairs may affect the phenotypes and growth of young plants. We tested this hypothesis by integrating results from two experiments: (1) a factorial greenhouse seedling experiment with Zea mays B73-wt and its root-hairless mutant, B73-rth3, grown in live and autoclaved soil, quantifying 15 phenotypic traits, seven growth rates, and soil microbiomes and (2) a semi-hydroponic system quantifying root exudation of maize genotypes. Possibly as compensation for lacking root hairs, B73-rth3 seedlings allocated more biomass to roots and grew slower than B73-wt seedlings in live soil, whereas B73-wt seedlings grew slowest in autoclaved soil, suggesting root hairs can be costly and their benefits were realized with more complete soil microbial assemblages. There were substantial differences in root exudation between genotypes and in rhizosphere versus non-rhizosphere microbiomes. The microbial taxa enriched in the presence of root hairs generally enhanced growth compared to taxa enriched in their absence. Our findings suggest the root hairs' adaptive value extends to plant-microbe interactions mediated by root exudates, affecting plant phenotypes, and ultimately, growth.
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Affiliation(s)
- Amanda Quattrone
- Complex Biosystems Ph.D. program, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
- School of Biological Sciences, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
- Center for Plant Science Innovation, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | | | - Pooja Yadav
- School of Biological Sciences, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | - Michael A Meier
- Department of Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
- Rancho Biosciences, San Diego, California, USA
| | - Sabrina E Russo
- School of Biological Sciences, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
- Center for Plant Science Innovation, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | - Karrie A Weber
- School of Biological Sciences, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
- Department of Earth and Atmospheric Sciences, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
- Daugherty Water for Food Institute, University of Nebraska, Lincoln, Nebraska, USA
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29
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Afridi MS, Kumar A, Javed MA, Dubey A, de Medeiros FHV, Santoyo G. Harnessing root exudates for plant microbiome engineering and stress resistance in plants. Microbiol Res 2024; 279:127564. [PMID: 38071833 DOI: 10.1016/j.micres.2023.127564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 11/02/2023] [Accepted: 11/27/2023] [Indexed: 12/23/2023]
Abstract
A wide range of abiotic and biotic stresses adversely affect plant's growth and production. Under stress, one of the main responses of plants is the modulation of exudates excreted in the rhizosphere, which consequently leads to alterations in the resident microbiota. Thus, the exudates discharged into the rhizospheric environment play a preponderant role in the association and formation of plant-microbe interactions. In this review, we aimed to provide a synthesis of the latest and most pertinent literature on the diverse biochemical and structural compositions of plant root exudates. Also, this work investigates into their multifaceted role in microbial nutrition and intricate signaling processes within the rhizosphere, which includes quorum-sensing molecules. Specifically, it explores the contributions of low molecular weight compounds, such as carbohydrates, phenolics, organic acids, amino acids, and secondary metabolites, as well as the significance of high molecular weight compounds, including proteins and polysaccharides. It also discusses the state-of-the-art omics strategies that unveil the vital role of root exudates in plant-microbiome interactions, including defense against pathogens like nematodes and fungi. We propose multiple challenges and perspectives, including exploiting plant root exudates for host-mediated microbiome engineering. In this discourse, root exudates and their derived interactions with the rhizospheric microbiota should receive greater attention due to their positive influence on plant health and stress mitigation.
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Affiliation(s)
- Muhammad Siddique Afridi
- Department of Plant Pathology, Federal University of Lavras, CP3037, 37200-900 Lavras, MG, Brazil.
| | - Ashwani Kumar
- Metagenomics and Secretomics Research Laboratory, Department of Botany, Dr. Harisingh Gour University (A Central University), Sagar 470003, MP, India
| | - Muhammad Ammar Javed
- Institute of Industrial Biotechnology, Government College University, Lahore 54000, Pakistan
| | - Anamika Dubey
- Metagenomics and Secretomics Research Laboratory, Department of Botany, Dr. Harisingh Gour University (A Central University), Sagar 470003, MP, India
| | | | - Gustavo Santoyo
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, 58030 Morelia, Mexico.
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30
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Aqeel M, Khalid N, Noman A, Ran J, Manan A, Hou Q, Dong L, Sun Y, Deng Y, Lee SS, Hu W, Deng J. Interplay between edaphic and climatic factors unravels plant and microbial diversity along an altitudinal gradient. ENVIRONMENTAL RESEARCH 2024; 242:117711. [PMID: 37995997 DOI: 10.1016/j.envres.2023.117711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Revised: 11/03/2023] [Accepted: 11/15/2023] [Indexed: 11/25/2023]
Abstract
Altitude influences biodiversity and physiochemical soil attributes in terrestrial ecosystems. It is of immense importance to know the patterns of how interactions among climatic and edaphic factors influence plant and microbial diversity in various ecosystems, particularly along the gradients. We hypothesize that altitudinal variation determines the distribution of plant and microbial species as well as their interactions. To test the hypothesis, different sites with variable altitudes were selected. Analyses of edaphic factors revealed significant (p < 0.001) effects of the altitude. Soil ammonium and nitrate were strongly affected by it contrary to potassium (K), soil organic matter and carbon. The response patterns of individual taxonomic groups differed across the altitudinal gradient. Plant species and soil fungal diversity increased with increasing altitude, while soil archaeal and bacterial diversity decreased with increasing altitude. Plant species richness showed significant positive and negative interactions with edaphic and climatic factors. Fungal species richness was also significantly influenced by the soil ammonium, nitrate, available phosphorus, available potassium, electrical conductivity, and the pH of the soil, but showed non-significant interactions with other edaphic factors. Similarly, soil variables had limited impact on soil bacterial and archaeal species richness along the altitude gradient. Proteobacteria, Ascomycota, and Thaumarchaeota dominate soil bacterial, fungal, and archaeal communities, with relative abundance of 27.4%, 70.56%, and 81.55%, respectively. Additionally, Cynodon dactylon is most abundant plant species, comprising 22.33% of the recorded plant taxa in various study sites. RDA revealed that these communities influenced by certain edaphic and climatic factors, e.g., Actinobacteria strongly respond to MAT, EC, and C/N ratio, Ascomycota and Basidiomycota show strong associations with EC and MAP, respectively. Thaumarcheota are linked to pH, and OM, while Cyperus rotundus are sensitive to AI and EC. In conclusion, the observed variations in microbial as well as plant species richness and changes in soil properties at different elevations provide valuable insights into the factors determining ecosystem stability and multifunctionality in different regions.
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Affiliation(s)
- Muhammad Aqeel
- State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems (SKLHIGA), College of Ecology, Lanzhou University, 730000, Lanzhou, PR China
| | - Noreen Khalid
- Department of Botany, Government College Women University Sialkot, Pakistan
| | - Ali Noman
- Department of Botany, Government College University Faisalabad, Pakistan
| | - Jinzhi Ran
- State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems (SKLHIGA), College of Ecology, Lanzhou University, 730000, Lanzhou, PR China
| | - Abdul Manan
- State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems (SKLHIGA), College of Ecology, Lanzhou University, 730000, Lanzhou, PR China
| | - Qingqing Hou
- State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems (SKLHIGA), College of Ecology, Lanzhou University, 730000, Lanzhou, PR China
| | - Longwei Dong
- State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems (SKLHIGA), College of Ecology, Lanzhou University, 730000, Lanzhou, PR China
| | - Ying Sun
- State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems (SKLHIGA), College of Ecology, Lanzhou University, 730000, Lanzhou, PR China
| | - Yan Deng
- State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems (SKLHIGA), College of Ecology, Lanzhou University, 730000, Lanzhou, PR China
| | - Sang Soo Lee
- Department of Environmental and Energy Engineering, Yonsei University, Wonju, 26493, Republic of Korea
| | - Weigang Hu
- State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems (SKLHIGA), College of Ecology, Lanzhou University, 730000, Lanzhou, PR China.
| | - Jianming Deng
- State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems (SKLHIGA), College of Ecology, Lanzhou University, 730000, Lanzhou, PR China.
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Fickling NW, Abbott CA, Brame JE, Cando‐Dumancela C, Liddicoat C, Robinson JM, Breed MF. Light-dark cycles may influence in situ soil bacterial networks and diurnally-sensitive taxa. Ecol Evol 2024; 14:e11018. [PMID: 38357595 PMCID: PMC10864733 DOI: 10.1002/ece3.11018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Revised: 12/10/2023] [Accepted: 12/11/2023] [Indexed: 02/16/2024] Open
Abstract
Soil bacterial taxa have important functional roles in ecosystems (e.g. nutrient cycling, soil formation, plant health). Many factors influence their assembly and regulation, with land cover types (e.g. open woodlands, grasslands), land use types (e.g. nature reserves, urban green space) and plant-soil feedbacks being well-studied factors. However, changes in soil bacterial communities in situ over light-dark cycles have received little attention, despite many plants and some bacteria having endogenous circadian rhythms that could influence soil bacterial communities. We sampled surface soils in situ across 24-h light-dark cycles (at 00:00, 06:00, 12:00, 18:00) at two land cover types (remnant vegetation vs. cleared, grassy areas) and applied 16S rRNA amplicon sequencing to investigate changes in bacterial communities. We show that land cover type strongly affected soil bacterial diversity, with soils under native vegetation expressing 15.4%-16.4% lower alpha diversity but 4.9%-10.6% greater heterogeneity than soils under cleared vegetation. In addition, we report time-dependent and site-specific changes in bacterial network complexity and between 598-922 ASVs showing significant changes in relative abundance across times. Native site node degree (bacterial interactions) at the phylum level was 16.0% higher in the early morning than in the afternoon/evening. Our results demonstrate for the first time that light-dark cycles have subtle yet important effects on soil bacterial communities in situ and that land cover influences these dynamics. We provide a new view of soil microbial ecology and suggest that future studies should consider the time of day when sampling soil bacteria.
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Affiliation(s)
- Nicole W. Fickling
- College of Science and EngineeringFlinders UniversityBedford ParkSouth AustraliaAustralia
| | - Catherine A. Abbott
- College of Science and EngineeringFlinders UniversityBedford ParkSouth AustraliaAustralia
| | - Joel E. Brame
- College of Science and EngineeringFlinders UniversityBedford ParkSouth AustraliaAustralia
| | | | - Craig Liddicoat
- College of Science and EngineeringFlinders UniversityBedford ParkSouth AustraliaAustralia
| | - Jake M. Robinson
- College of Science and EngineeringFlinders UniversityBedford ParkSouth AustraliaAustralia
| | - Martin F. Breed
- College of Science and EngineeringFlinders UniversityBedford ParkSouth AustraliaAustralia
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Abou Jaoudé R, Luziatelli F, Ficca AG, Ruzzi M. A plant's perception of growth-promoting bacteria and their metabolites. FRONTIERS IN PLANT SCIENCE 2024; 14:1332864. [PMID: 38328622 PMCID: PMC10848262 DOI: 10.3389/fpls.2023.1332864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Accepted: 12/28/2023] [Indexed: 02/09/2024]
Abstract
Many recent studies have highlighted the importance of plant growth-promoting (rhizo)bacteria (PGPR) in supporting plant's development, particularly under biotic and abiotic stress. Most focus on the plant growth-promoting traits of selected strains and the latter's effect on plant biomass, root architecture, leaf area, and specific metabolite accumulation. Regarding energy balance, plant growth is the outcome of an input (photosynthesis) and several outputs (i.e., respiration, exudation, shedding, and herbivory), frequently neglected in classical studies on PGPR-plant interaction. Here, we discuss the primary evidence underlying the modifications triggered by PGPR and their metabolites on the plant ecophysiology. We propose to detect PGPR-induced variations in the photosynthetic activity using leaf gas exchange and recommend setting up the correct timing for monitoring plant responses according to the specific objectives of the experiment. This research identifies the challenges and tries to provide future directions to scientists working on PGPR-plant interactions to exploit the potential of microorganisms' application in improving plant value.
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Affiliation(s)
- Renée Abou Jaoudé
- Department for Innovation in Biological, Agrofood and Forest Systems (DIBAF), University of Tuscia, Viterbo, Italy
| | | | | | - Maurizio Ruzzi
- Department for Innovation in Biological, Agrofood and Forest Systems (DIBAF), University of Tuscia, Viterbo, Italy
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Knights HE, Ramachandran VK, Jorrin B, Ledermann R, Parsons JD, Aroney STN, Poole PS. Rhizobium determinants of rhizosphere persistence and root colonization. THE ISME JOURNAL 2024; 18:wrae072. [PMID: 38690786 PMCID: PMC11103875 DOI: 10.1093/ismejo/wrae072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Revised: 04/16/2024] [Accepted: 04/23/2024] [Indexed: 05/03/2024]
Abstract
Bacterial persistence in the rhizosphere and colonization of root niches are critical for the establishment of many beneficial plant-bacteria interactions including those between Rhizobium leguminosarum and its host legumes. Despite this, most studies on R. leguminosarum have focused on its symbiotic lifestyle as an endosymbiont in root nodules. Here, we use random barcode transposon sequencing to assay gene contributions of R. leguminosarum during competitive growth in the rhizosphere and colonization of various plant species. This facilitated the identification of 189 genes commonly required for growth in diverse plant rhizospheres, mutation of 111 of which also affected subsequent root colonization (rhizosphere progressive), and a further 119 genes necessary for colonization. Common determinants reveal a need to synthesize essential compounds (amino acids, ribonucleotides, and cofactors), adapt metabolic function, respond to external stimuli, and withstand various stresses (such as changes in osmolarity). Additionally, chemotaxis and flagella-mediated motility are prerequisites for root colonization. Many genes showed plant-specific dependencies highlighting significant adaptation to different plant species. This work provides a greater understanding of factors promoting rhizosphere fitness and root colonization in plant-beneficial bacteria, facilitating their exploitation for agricultural benefit.
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Affiliation(s)
- Hayley E Knights
- Department of Biology, University of Oxford, Oxford OX1 3RB, United Kingdom
| | | | - Beatriz Jorrin
- Department of Biology, University of Oxford, Oxford OX1 3RB, United Kingdom
| | - Raphael Ledermann
- Department of Biology, University of Oxford, Oxford OX1 3RB, United Kingdom
| | - Jack D Parsons
- Department of Biology, University of Oxford, Oxford OX1 3RB, United Kingdom
| | - Samuel T N Aroney
- Department of Biology, University of Oxford, Oxford OX1 3RB, United Kingdom
| | - Philip S Poole
- Department of Biology, University of Oxford, Oxford OX1 3RB, United Kingdom
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Sembada AA, Lenggoro IW. Transport of Nanoparticles into Plants and Their Detection Methods. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:131. [PMID: 38251096 PMCID: PMC10819755 DOI: 10.3390/nano14020131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 12/29/2023] [Accepted: 01/02/2024] [Indexed: 01/23/2024]
Abstract
Nanoparticle transport into plants is an evolving field of research with diverse applications in agriculture and biotechnology. This article provides an overview of the challenges and prospects associated with the transport of nanoparticles in plants, focusing on delivery methods and the detection of nanoparticles within plant tissues. Passive and assisted delivery methods, including the use of roots and leaves as introduction sites, are discussed, along with their respective advantages and limitations. The barriers encountered in nanoparticle delivery to plants are highlighted, emphasizing the need for innovative approaches (e.g., the stem as a new recognition site) to optimize transport efficiency. In recent years, research efforts have intensified, leading to an evendeeper understanding of the intricate mechanisms governing the interaction of nanomaterials with plant tissues and cells. Investigations into the uptake pathways and translocation mechanisms within plants have revealed nuanced responses to different types of nanoparticles. Additionally, this article delves into the importance of detection methods for studying nanoparticle localization and quantification within plant tissues. Various techniques are presented as valuable tools for comprehensively understanding nanoparticle-plant interactions. The reliance on multiple detection methods for data validation is emphasized to enhance the reliability of the research findings. The future outlooks of this field are explored, including the potential use of alternative introduction sites, such as stems, and the continued development of nanoparticle formulations that improve adhesion and penetration. By addressing these challenges and fostering multidisciplinary research, the field of nanoparticle transport in plants is poised to make significant contributions to sustainable agriculture and environmental management.
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Affiliation(s)
- Anca Awal Sembada
- Department of Applied Physics and Chemical Engineering, Graduate School of Engineering, Tokyo University of Agriculture and Technology, Tokyo 184-8588, Japan;
- School of Life Sciences and Technology, Bandung Institute of Technology, Bandung 40132, Indonesia
| | - I. Wuled Lenggoro
- Department of Applied Physics and Chemical Engineering, Graduate School of Engineering, Tokyo University of Agriculture and Technology, Tokyo 184-8588, Japan;
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Fang M, Lu G, Zhang S, Liang W. Overgrazing on unmanaged grassland interfered with the restoration of adjacent grazing-banned grassland by affecting soil properties and microbial community. Front Microbiol 2024; 14:1327056. [PMID: 38239733 PMCID: PMC10794652 DOI: 10.3389/fmicb.2023.1327056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 11/29/2023] [Indexed: 01/22/2024] Open
Abstract
A "grazing ban" policy has been implemented in some pastoral areas in China to fence degraded grasslands for restoration. However, fencing increased grazing pressures in unmanaged grasslands. Based on the mechanism of negative edge effect, we investigated whether overgrazing on unmanaged grassland interfered with the restoration of adjacent grazing-banned grassland by affecting soil properties and microbial community using a sample in Hulun Buir of Inner Mongolia, in order to optimize the "grazing ban" policy. Plant and soil were sampled in areas 30 m away from the fence in unmanaged grassland (UM) and in areas 30 m (adjacent to UM) and 30-60 m (not adjacent to UM) away from the fence in the grazing-banned grassland (F-30 m and F-60 m). The species richness and diversity of plant communities and the ASV number of fungal communities significantly decreased in F-30 m and UM, and the Simpson index of the bacterial community significantly decreased in F-30 m compared with F-60 m. The abundance of fungi involved in soil organic matter decomposition significantly decreased and the abundance of stress-resistant bacteria significantly increased, while the abundance of bacteria involved in litter decomposition significantly decreased in UM and F-30 m compared with F-60 m. The simplification of plant communities decreased in soil water and total organic carbon contents can explain the variations of soil microbial communities in both UM and F-30 m compared with F-60 m. The results of PLS-PM show that changes in plant community and soil microbial function guilds in UM may affect those in F-30 m by changing soil water and total organic carbon contents. These results indicate that overgrazing on unmanaged grassland interfered with the restoration of adjacent grazing-banned grassland by affecting soil properties and microbial community. The grazing-banned grasslands should be adjusted periodically in order to avoid negative edge effects.
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Affiliation(s)
- Mengchao Fang
- College of Life and Environment Science, Minzu University of China, Beijing, China
| | - Guang Lu
- College of Life and Environment Science, Minzu University of China, Beijing, China
| | - Shuping Zhang
- College of Life and Environment Science, Minzu University of China, Beijing, China
| | - Wei Liang
- Ministry of Education Key Laboratory for Ecology of Tropical Islands, Key Laboratory of Tropical Animal and Plant Ecology of Hainan Province, College of Life Sciences, Hainan Normal University, Haikou, China
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Liu C, Geng HY, Li WX, Li YY, Lu YS, Xie KZ, Sun LL, Zhang JX, Peng HL, Shi CH, Li WL, Zhou CM, Gu WJ, Wang D. Innate Root Exudates Contributed to Contrasting Coping Strategies in Response to Ralstonia solanacearum in Resistant and Susceptible Tomato Cultivars. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:20092-20104. [PMID: 38051256 DOI: 10.1021/acs.jafc.3c06410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
Tomato cultivars with contrasting resistance to pathogens regulate root exudates differentially in response to Ralstonia solanacearum attacks. However, strategies using innate root exudates against infection remain unknown. This study analyzed the innate root exudates of two tomato cultivars and their functions in regulating R. solanacearum infection. The innate root exudates differed between the two cultivars. Astaxanthin released from resistant plants inhibited colonization by R. solanacearum but promoted motility, while neferine released from susceptible plants suppressed motility and colonization. The secretion of astaxanthin in resistant tomatoes promoted the growth of biocontrol fungi in soil and reduced the abundance of pathogenic fungi. Neferine secreted by the susceptible cultivar inhibited the relative abundance of the bacterial-biocontrol-related Bacillus genus, indirectly reducing the soil's immune capacity. This study revealed contrasting strategies using root exudates in resistant and susceptible tomato cultivars to cope with R. solanacearum infection, providing a basis for breeding disease-resistant cultivars.
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Affiliation(s)
- Chong Liu
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture and Rural Affairs/Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation/Guangdong Engineering Research Center of Soil Microbes and Cultivated Land Conservation, Guangzhou 510640, China
| | - Hao-Yang Geng
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture and Rural Affairs/Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation/Guangdong Engineering Research Center of Soil Microbes and Cultivated Land Conservation, Guangzhou 510640, China
| | - Wang-Xi Li
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture and Rural Affairs/Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation/Guangdong Engineering Research Center of Soil Microbes and Cultivated Land Conservation, Guangzhou 510640, China
| | - Ya-Ying Li
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture and Rural Affairs/Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation/Guangdong Engineering Research Center of Soil Microbes and Cultivated Land Conservation, Guangzhou 510640, China
| | - Yu-Sheng Lu
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture and Rural Affairs/Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation/Guangdong Engineering Research Center of Soil Microbes and Cultivated Land Conservation, Guangzhou 510640, China
| | - Kai-Zhi Xie
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture and Rural Affairs/Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation/Guangdong Engineering Research Center of Soil Microbes and Cultivated Land Conservation, Guangzhou 510640, China
| | - Li Li Sun
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture and Rural Affairs/Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation/Guangdong Engineering Research Center of Soil Microbes and Cultivated Land Conservation, Guangzhou 510640, China
| | - Jie-Xin Zhang
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture and Rural Affairs/Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation/Guangdong Engineering Research Center of Soil Microbes and Cultivated Land Conservation, Guangzhou 510640, China
| | - Huan-Long Peng
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture and Rural Affairs/Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation/Guangdong Engineering Research Center of Soil Microbes and Cultivated Land Conservation, Guangzhou 510640, China
| | - Chao-Hong Shi
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture and Rural Affairs/Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation/Guangdong Engineering Research Center of Soil Microbes and Cultivated Land Conservation, Guangzhou 510640, China
| | - Wan-Ling Li
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture and Rural Affairs/Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation/Guangdong Engineering Research Center of Soil Microbes and Cultivated Land Conservation, Guangzhou 510640, China
| | - Chang-Min Zhou
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture and Rural Affairs/Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation/Guangdong Engineering Research Center of Soil Microbes and Cultivated Land Conservation, Guangzhou 510640, China
| | - Wen-Jie Gu
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture and Rural Affairs/Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation/Guangdong Engineering Research Center of Soil Microbes and Cultivated Land Conservation, Guangzhou 510640, China
- Maoming Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Maoming 525000, China
| | - Dan Wang
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture and Rural Affairs/Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation/Guangdong Engineering Research Center of Soil Microbes and Cultivated Land Conservation, Guangzhou 510640, China
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Li Q, Chang J, Li L, Lin X, Li Y. Research progress of nano-scale secondary ion mass spectrometry (NanoSIMS) in soil science: Evolution, applications, and challenges. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 905:167257. [PMID: 37741415 DOI: 10.1016/j.scitotenv.2023.167257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 09/19/2023] [Accepted: 09/20/2023] [Indexed: 09/25/2023]
Abstract
Nano-scale secondary ion mass spectrometry (NanoSIMS) has emerged as a powerful analytical tool for investigating various aspects of soils. In recent decades, the widespread adoption of advanced instrumentation and methods has contributed significantly to our understanding of organic-mineral assemblages. However, few literature reviews have comprehensively summarized NanoSIMS and its evolution, applications, limitations, and integration with other analytical techniques. In this review, we addressed this gap by comprehensively overviewing the development of NanoSIMS as an analytical tool in soils. This review covers studies on soil organic matter (SOM) cycling, soil-root interactions, and the behavior of metals, discussing the capability and limitations related to the distribution, composition, and interactions of various soil components that occur at mineral-organic interfaces. Furthermore, we examine recent advancements in high-resolution imaging and mass spectrometry technologies and their impact on the utilization of NanoSIMS in soils, along with potential new applications such as utilizing multiple ion beams and integrating them with other analytical techniques. The review emphasizes the importance of employing advanced techniques and methods to explore micro-interfaces and provide in situ descriptions of organic-mineral assemblages in future research. The ongoing development and refinement of NanoSIMS may yield new insights and breakthroughs in soil science, deepening our understanding of the intricate relationships between soil components and the processes that govern soil health and fertility.
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Affiliation(s)
- Qi Li
- Key Laboratory of Plant Nutrition and Fertilizer in South Region, Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
| | - Jingjing Chang
- Key Laboratory for New Technology Research of Vegetable, Vegetable Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
| | - Linfeng Li
- Key Laboratory of Plant Nutrition and Fertilizer in South Region, Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
| | - Xiaoyang Lin
- Key Laboratory of Plant Nutrition and Fertilizer in South Region, Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
| | - Yichun Li
- Key Laboratory of Plant Nutrition and Fertilizer in South Region, Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China.
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Quattrone A, Yang Y, Yadav P, Weber KA, Russo SE. Nutrient and Microbiome-Mediated Plant-Soil Feedback in Domesticated and Wild Andropogoneae: Implications for Agroecosystems. Microorganisms 2023; 11:2978. [PMID: 38138123 PMCID: PMC10745641 DOI: 10.3390/microorganisms11122978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 11/23/2023] [Accepted: 11/28/2023] [Indexed: 12/24/2023] Open
Abstract
Plants influence the abiotic and biotic environment of the rhizosphere, affecting plant performance through plant-soil feedback (PSF). We compared the strength of nutrient and microbe-mediated PSF and its implications for plant performance in domesticated and wild grasses with a fully crossed greenhouse PSF experiment using four inbred maize genotypes (Zea mays ssp. mays b58, B73-wt, B73-rth3, and HP301), teosinte (Z. mays ssp. parviglumis), and two wild prairie grasses (Andropogon gerardii and Tripsacum dactyloides) to condition soils for three feedback species (maize B73-wt, teosinte, Andropogon gerardii). We found evidence of negative PSF based on growth, phenotypic traits, and foliar nutrient concentrations for maize B73-wt, which grew slower in maize-conditioned soil than prairie grass-conditioned soil. In contrast, teosinte and A. gerardii showed few consistent feedback responses. Both rhizobiome and nutrient-mediated mechanisms were implicated in PSF. Based on 16S rRNA gene amplicon sequencing, the rhizosphere bacterial community composition differed significantly after conditioning by prairie grass and maize plants, and the final soil nutrients were significantly influenced by conditioning, more so than by the feedback plants. These results suggest PSF-mediated soil domestication in agricultural settings can develop quickly and reduce crop productivity mediated by PSF involving changes to both the soil rhizobiomes and nutrient availability.
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Affiliation(s)
- Amanda Quattrone
- Complex Biosystems Ph.D. Program, University of Nebraska-Lincoln, Lincoln, NE 68583-0851, USA
- School of Biological Sciences, University of Nebraska-Lincoln, Lincoln, NE 68588-0118, USA; (Y.Y.)
- Center for Plant Science Innovation, University of Nebraska-Lincoln, Lincoln, NE 68583-0705, USA
| | - Yuguo Yang
- School of Biological Sciences, University of Nebraska-Lincoln, Lincoln, NE 68588-0118, USA; (Y.Y.)
| | - Pooja Yadav
- School of Biological Sciences, University of Nebraska-Lincoln, Lincoln, NE 68588-0118, USA; (Y.Y.)
| | - Karrie A. Weber
- School of Biological Sciences, University of Nebraska-Lincoln, Lincoln, NE 68588-0118, USA; (Y.Y.)
- Department of Earth and Atmospheric Sciences, University of Nebraska-Lincoln, Lincoln, NE 68588-0340, USA
- Daugherty Water for Food Institute, University of Nebraska, Lincoln, NE 68588-6203, USA
| | - Sabrina E. Russo
- School of Biological Sciences, University of Nebraska-Lincoln, Lincoln, NE 68588-0118, USA; (Y.Y.)
- Center for Plant Science Innovation, University of Nebraska-Lincoln, Lincoln, NE 68583-0705, USA
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Laftouhi A, Eloutassi N, Ech-Chihbi E, Rais Z, Taleb A, Assouguem A, Ullah R, Kara M, Fidan H, Beniken M, Taleb M. Impact of Climate Change on the Chemical Compositions and Antioxidant Activity of Mentha pulegium L. ACS OMEGA 2023; 8:46598-46607. [PMID: 38107916 PMCID: PMC10720290 DOI: 10.1021/acsomega.3c05564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Revised: 11/06/2023] [Accepted: 11/13/2023] [Indexed: 12/19/2023]
Abstract
A central position in Moroccan ethnobotany is held by the Mentha genus, serving as a vital reference for aromatic and medicinal plants within the Lamiaceae family. The profound importance of Mentha species in the daily lives of Moroccans is recognized, and the primary objective of this study is to assess the impact of rising temperatures and decreasing precipitation on the primary and secondary metabolites of Mentha pulegium under the following climatic conditions: sample 1, cultivated under standard temperature and precipitation conditions during the first year; sample 2, subjected to an 8 °C temperature increase and a 25% reduction in water supply; and sample 3, exposed to a 12 °C temperature rise and a 50% decrease in water availability. Phytochemical screening results reveal a progressive decline in primary metabolites from sample 1 to sample 3 due to the increase in temperature and decrease in precipitation. Conversely, a distinct trend is observed in secondary metabolites and the yield of essential oil, increasing from sample 1 to sample 2 as the temperature rises and precipitation decreases. Remarkably, in sample 3, the yield of essential oil decreases as climatic conditions further deteriorate. Additionally, GC analysis demonstrates that modifications in the chemical compositions of essential oils occur because of the disruption of climatic parameters, particularly in the major compounds. Similarly, changes in climatic parameters significantly influence antioxidant activity, with sample 2 exhibiting the highest activity, as reflected by an IC50 value (half-maximal inhibitory concentration) of 14,874.04 μg/mL, followed by the third sample at 8488.43 μg/mL, whereas the first sample exhibits the lowest activity at 4505.02 μg/mL. In summary, the complex relationship between climatic factors and the chemical composition of Mentha pulegium is highlighted by our experiment, emphasizing its implications for medicinal properties within an ecological context.
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Affiliation(s)
- Abdelouahid Laftouhi
- Laboratory
of Electrochemistry, Modeling and Environment Engineering (LIEME), Sidi Mohamed Ben Abdellah University, Faculty of Sciences
Fes, Fes 30000, Morocco
| | - Noureddine Eloutassi
- Laboratory
of Electrochemistry, Modeling and Environment Engineering (LIEME), Sidi Mohamed Ben Abdellah University, Faculty of Sciences
Fes, Fes 30000, Morocco
| | - Elhachmia Ech-Chihbi
- Laboratory
of Electrochemistry, Modeling and Environment Engineering (LIEME), Sidi Mohamed Ben Abdellah University, Faculty of Sciences
Fes, Fes 30000, Morocco
| | - Zakia Rais
- Laboratory
of Electrochemistry, Modeling and Environment Engineering (LIEME), Sidi Mohamed Ben Abdellah University, Faculty of Sciences
Fes, Fes 30000, Morocco
| | - Abdslam Taleb
- Environmental
Process Engineering Laboratory- Faculty of Science and Technology
Mohammedia, Hassan II University of Casablanca, Fes 30000, Morocco
| | - Amine Assouguem
- Laboratory
of Functional Ecology and Environment, Faculty of Sciences and Technology, Sidi Mohamed Ben Abdellah University, Imouzzer Street, P.O. Box 2202, Fez 30000, Morocco
- Laboratory
of Applied Organic Chemistry, Faculty of Sciences and Technology, Sidi Mohamed Ben Abdellah University, Imouzzer street, P.O. Box 2202, Fez 30000, Morocco
| | - Riaz Ullah
- Department
of Pharmacognosy, College of Pharmacy, King
Saud University, Riyadh 11451, Saudi Arabia
| | - Mohammed Kara
- Laboratory
of Biotechnology, Conservation and Valorisation of Natural Resources
(LBCVNR), Faculty of Sciences Dhar El Mehraz,
University Sidi Mohamed Ben Abdallah, BP 1796 Atlas, Fez 30000, Morocco
| | - Hafize Fidan
- University
of Food Technologies, Plovdiv 4000, Bulgaria
| | - Mustapha Beniken
- Laboratory
of Electrochemistry, Modeling and Environment Engineering (LIEME), Sidi Mohamed Ben Abdellah University, Faculty of Sciences
Fes, Fes 30000, Morocco
| | - Mustapha Taleb
- Laboratory
of Electrochemistry, Modeling and Environment Engineering (LIEME), Sidi Mohamed Ben Abdellah University, Faculty of Sciences
Fes, Fes 30000, Morocco
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Pena R, Bluhm SL, Ammerschubert S, Agüi-Gonzalez P, Rizzoli SO, Scheu S, Polle A. Mycorrhizal C/N ratio determines plant-derived carbon and nitrogen allocation to symbiosis. Commun Biol 2023; 6:1230. [PMID: 38053000 PMCID: PMC10698078 DOI: 10.1038/s42003-023-05591-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Accepted: 11/15/2023] [Indexed: 12/07/2023] Open
Abstract
Carbon allocation of trees to ectomycorrhizas is thought to shape forest nutrient cycling, but the sink activities of different fungal taxa for host resources are unknown. Here, we investigate fungal taxon-specific differences in naturally composed ectomycorrhizal (EM) communities for plant-derived carbon and nitrogen. After aboveground dual labeling of young beech with 15N and 13C, ectomycorrhizas formed with different fungal taxa exhibit strong differences in label enrichment. Secondary Ion Mass Spectrometry (SIMS) imaging of nitrogen in cross sections of ectomycorrhizas demonstrates plant-derived 15N in both root and fungal structures. Isotope enrichment in ectomycorrhizas correlates with that in the corresponding ectomycorrhiza-attached lateral root, supporting fungal taxon-specific N and C fluxes in ectomycorrhizas. The enrichments with 13C and 15N in the symbiosis decrease with increasing C/N ratio of ectomycorrhizas, converging to zero at high C/N. The relative abundances of EM fungal species on roots are positively correlated with 13C enrichment, demonstrating higher fitness of stronger than of less C-demanding symbioses. Overall, our results support that differences among the C/N ratios in ectomycorrhizas formed with different fungal species regulate the supply of the symbioses with host-derived carbon and provide insights on functional traits of ectomycorrhizas, which are important for major ecosystem processes.
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Affiliation(s)
- Rodica Pena
- Forest Botany and Tree Physiology, University of Göttingen, Göttingen, Germany
- Department of Sustainable Land Management, School of Agriculture Policy and Development, University of Reading, Reading, UK
| | - Sarah L Bluhm
- J.F. Blumenbach Institute of Zoology and Anthropology, Animal Ecology, University of Göttingen, Göttingen, Germany
| | - Silke Ammerschubert
- Forest Botany and Tree Physiology, University of Göttingen, Göttingen, Germany
| | - Paola Agüi-Gonzalez
- Department of Neuro- and Sensory Physiology and Center for Biostructural Imaging of Neurodegeneration, University Medical Center Göttingen, Göttingen, Germany
| | - Silvio O Rizzoli
- Department of Neuro- and Sensory Physiology and Center for Biostructural Imaging of Neurodegeneration, University Medical Center Göttingen, Göttingen, Germany
| | - Stefan Scheu
- J.F. Blumenbach Institute of Zoology and Anthropology, Animal Ecology, University of Göttingen, Göttingen, Germany
- Centre for Biodiversity and Sustainable Land Use, University of Göttingen, Göttingen, Germany
| | - Andrea Polle
- Forest Botany and Tree Physiology, University of Göttingen, Göttingen, Germany.
- Centre for Biodiversity and Sustainable Land Use, University of Göttingen, Göttingen, Germany.
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41
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Madison I, Gillan L, Peace J, Gabrieli F, Van den Broeck L, Jones JL, Sozzani R. Phosphate starvation: response mechanisms and solutions. JOURNAL OF EXPERIMENTAL BOTANY 2023; 74:6417-6430. [PMID: 37611151 DOI: 10.1093/jxb/erad326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Accepted: 08/21/2023] [Indexed: 08/25/2023]
Abstract
Phosphorus is essential to plant growth and agricultural crop yields, yet the challenges associated with phosphorus fertilization in agriculture, such as aquatic runoff pollution and poor phosphorus bioavailability, are increasingly difficult to manage. Comprehensively understanding the dynamics of phosphorus uptake and signaling mechanisms will inform the development of strategies to address these issues. This review describes regulatory mechanisms used by specific tissues in the root apical meristem to sense and take up phosphate from the rhizosphere. The major regulatory mechanisms and related hormone crosstalk underpinning phosphate starvation responses, cellular phosphate homeostasis, and plant adaptations to phosphate starvation are also discussed, along with an overview of the major mechanism of plant systemic phosphate starvation responses. Finally, this review discusses recent promising genetic engineering strategies for improving crop phosphorus use and computational approaches that may help further design strategies for improved plant phosphate acquisition. The mechanisms and approaches presented include a wide variety of species including not only Arabidopsis but also crop species such as Oryza sativa (rice), Glycine max (soybean), and Triticum aestivum (wheat) to address both general and species-specific mechanisms and strategies. The aspects of phosphorus deficiency responses and recently employed strategies of improving phosphate acquisition that are detailed in this review may provide insights into the mechanisms or phenotypes that may be targeted in efforts to improve crop phosphorus content and plant growth in low phosphorus soils.
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Affiliation(s)
- Imani Madison
- Plant and Microbial Biology Department and NC Plant Sciences Initiative, North Carolina State University, Raleigh, NC 27695, USA
| | - Lydia Gillan
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, NC 27695, USA
| | - Jasmine Peace
- Department of Biological Sciences, North Carolina State University, Raleigh, NC 27695, USA
| | - Flavio Gabrieli
- Dipartimento di Ingegneria Industriale (DII), Università degli studi di Padova, Padova, Italy
- Dipartimento di Scienze Agrarie, Alimentari e Ambientali (DSA3), Università degli Studi di Perugia, Perugia, Italy
| | - Lisa Van den Broeck
- Plant and Microbial Biology Department and NC Plant Sciences Initiative, North Carolina State University, Raleigh, NC 27695, USA
| | - Jacob L Jones
- Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695, USA
| | - Rosangela Sozzani
- Plant and Microbial Biology Department and NC Plant Sciences Initiative, North Carolina State University, Raleigh, NC 27695, USA
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Hildebrand GA, Honeker LK, Freire-Zapata V, Ayala-Ortiz C, Rajakaruna S, Fudyma J, Daber LE, AminiTabrizi R, Chu RL, Toyoda J, Flowers SE, Hoyt DW, Hamdan R, Gil-Loaiza J, Shi L, Dippold MA, Ladd SN, Werner C, Meredith LK, Tfaily MM. Uncovering the dominant role of root metabolism in shaping rhizosphere metabolome under drought in tropical rainforest plants. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 899:165689. [PMID: 37481084 DOI: 10.1016/j.scitotenv.2023.165689] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 06/29/2023] [Accepted: 07/19/2023] [Indexed: 07/24/2023]
Abstract
Plant-soil-microbe interactions are crucial for driving rhizosphere processes that contribute to metabolite turnover and nutrient cycling. With the increasing frequency and severity of water scarcity due to climate warming, understanding how plant-mediated processes, such as root exudation, influence soil organic matter turnover in the rhizosphere is essential. In this study, we used 16S rRNA gene amplicon sequencing, rhizosphere metabolomics, and position-specific 13C-pyruvate labeling to examine the effects of three different plant species (Piper auritum, Hibiscus rosa sinensis, and Clitoria fairchildiana) and their associated microbial communities on soil organic carbon turnover in the rhizosphere. Our findings indicate that in these tropical plants, the rhizosphere metabolome is primarily shaped by the response of roots to drought rather than direct shifts in the rhizosphere bacterial community composition. Specifically, the reduced exudation of plant roots had a notable effect on the metabolome of the rhizosphere of P. auritum, with less reliance on neighboring microbes. Contrary to P. auritum, H. rosa sinensis and C. fairchildiana experienced changes in their exudate composition during drought, causing alterations to the bacterial communities in the rhizosphere. This, in turn, had a collective impact on the rhizosphere's metabolome. Furthermore, the exclusion of phylogenetically distant microbes from the rhizosphere led to shifts in its metabolome. Additionally, C. fairchildiana appeared to be associated with only a subset of symbiotic bacteria under drought conditions. These results indicate that plant species-specific microbial interactions systematically change with the root metabolome. As roots respond to drought, their associated microbial communities adapt, potentially reinforcing the drought tolerance strategies of plant roots. These findings have significant implications for maintaining plant health and preference during drought stress and improving plant performance under climate change.
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Affiliation(s)
- Gina A Hildebrand
- Department of Environmental Science, University of Arizona, 1177 E 4th St., AZ 85721, USA
| | - Linnea K Honeker
- BIO5 Institute, The University of Arizona, 1657 E Helen St., Tucson, AZ 85719, USA; School of Natural Resources and the Environment, University of Arizona, 1064 E Lowell St., Tucson, AZ 85721, USA
| | - Viviana Freire-Zapata
- Department of Environmental Science, University of Arizona, 1177 E 4th St., AZ 85721, USA
| | - Christian Ayala-Ortiz
- Department of Environmental Science, University of Arizona, 1177 E 4th St., AZ 85721, USA
| | - Sumudu Rajakaruna
- Department of Environmental Science, University of Arizona, 1177 E 4th St., AZ 85721, USA
| | - Jane Fudyma
- Department of Environmental Science, University of Arizona, 1177 E 4th St., AZ 85721, USA; Department of Plant Pathology, University of California, Davis, One Shields Avenue, Davis, CA 95816, USA
| | - L Erik Daber
- Georges-Köhler-Allee 53/54, University of Freiburg, 79110 Freiburg, Germany
| | - Roya AminiTabrizi
- Department of Environmental Science, University of Arizona, 1177 E 4th St., AZ 85721, USA
| | - Rosalie L Chu
- Pacific Northwest National Laboratory, 902 Battelle Blvd, Richland, WA 99354, USA
| | - Jason Toyoda
- Pacific Northwest National Laboratory, 902 Battelle Blvd, Richland, WA 99354, USA
| | - Sarah E Flowers
- Pacific Northwest National Laboratory, 902 Battelle Blvd, Richland, WA 99354, USA
| | - David W Hoyt
- Pacific Northwest National Laboratory, 902 Battelle Blvd, Richland, WA 99354, USA
| | - Rasha Hamdan
- Department of Chemistry and Biochemistry, Lebanese University, Beirut, Lebanon
| | - Juliana Gil-Loaiza
- School of Natural Resources and the Environment, University of Arizona, 1064 E Lowell St., Tucson, AZ 85721, USA
| | - Lingling Shi
- Geo-Biosphere Interactions, Department of Geosciences, University of Tuebingen, Schnarrenbergstrasse 94-96, 72076 Tuebingen, Germany
| | - Michaela A Dippold
- Geo-Biosphere Interactions, Department of Geosciences, University of Tuebingen, Schnarrenbergstrasse 94-96, 72076 Tuebingen, Germany
| | - S Nemiah Ladd
- Georges-Köhler-Allee 53/54, University of Freiburg, 79110 Freiburg, Germany; Department of Environmental Science, University of Basel, Bernoullistrasse 30/32, 4056 Basel, Switzerland
| | - Christiane Werner
- Georges-Köhler-Allee 53/54, University of Freiburg, 79110 Freiburg, Germany
| | - Laura K Meredith
- BIO5 Institute, The University of Arizona, 1657 E Helen St., Tucson, AZ 85719, USA; School of Natural Resources and the Environment, University of Arizona, 1064 E Lowell St., Tucson, AZ 85721, USA; Biosphere 2, University of Arizona, 32540 S Biosphere Rd, Oracle, AZ 85739, USA
| | - Malak M Tfaily
- Department of Environmental Science, University of Arizona, 1177 E 4th St., AZ 85721, USA; BIO5 Institute, The University of Arizona, 1657 E Helen St., Tucson, AZ 85719, USA; Pacific Northwest National Laboratory, 902 Battelle Blvd, Richland, WA 99354, USA.
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Ujvári G, Capo L, Grassi A, Cristani C, Pagliarani I, Turrini A, Blandino M, Giovannetti M, Agnolucci M. Agronomic strategies to enhance the early vigor and yield of maize. Part I: the role of seed applied biostimulant, hybrid and starter fertilization on rhizosphere bacteria profile and diversity. FRONTIERS IN PLANT SCIENCE 2023; 14:1240310. [PMID: 38023909 PMCID: PMC10651756 DOI: 10.3389/fpls.2023.1240310] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 10/18/2023] [Indexed: 12/01/2023]
Abstract
The sustainable intensification of maize-based systems may reduce greenhouse-gas emissions and the excessive use of non-renewable inputs. Considering the key role that the microbiological fertility has on crop growth and resilience, it is worth of interest studying the role of cropping system on the rhizosphere bacterial communities, that affect soil health and biological soil fertility. In this work we monitored and characterized the diversity and composition of native rhizosphere bacterial communities during the early growth phases of two maize genotypes of different early vigor, using a nitrogen (N)-phosphorus (P) starter fertilization and a biostimulant seed treatment, in a growth chamber experiment, by polymerase chain reaction-denaturing gradient gel electrophoresis of partial 16S rRNA gene and amplicon sequencing. Cluster analyses showed that the biostimulant treatment affected the rhizosphere bacterial microbiota of the ordinary hybrid more than that of the early vigor, both at plant emergence and at the 5-leaf stage. Moreover, the diversity indices calculated from the community profiles, revealed significant effects of NP fertilization on richness and the estimated effective number of species (H2) in both maize genotypes, while the biostimulant had a positive effect on plant growth promoting community of the ordinary hybrid, both at the plant emergence and at the fifth leaf stage. Our data showed that maize genotype was the major factor shaping rhizosphere bacterial community composition suggesting that the root system of the two maize hybrids recruited a different microbiota. Moreover, for the first time, we identified at the species and genus level the predominant native bacteria associated with two maize hybrids differing for vigor. These results pave the way for further studies to be performed on the effects of cropping system and specific crop practices, considering also the application of biostimulants, on beneficial rhizosphere microorganisms.
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Affiliation(s)
- Gergely Ujvári
- Department of Agriculture, Food and Environment, University of Pisa, Pisa, Italy
| | - Luca Capo
- Department of Agriculture, Forest and Food Sciences, University of Turin, Grugliasco, Italy
| | - Arianna Grassi
- Department of Agriculture, Food and Environment, University of Pisa, Pisa, Italy
| | - Caterina Cristani
- Department of Agriculture, Food and Environment, University of Pisa, Pisa, Italy
| | - Irene Pagliarani
- Department of Agriculture, Food and Environment, University of Pisa, Pisa, Italy
| | - Alessandra Turrini
- Department of Agriculture, Food and Environment, University of Pisa, Pisa, Italy
| | - Massimo Blandino
- Department of Agriculture, Forest and Food Sciences, University of Turin, Grugliasco, Italy
| | - Manuela Giovannetti
- Department of Agriculture, Food and Environment, University of Pisa, Pisa, Italy
| | - Monica Agnolucci
- Department of Agriculture, Food and Environment, University of Pisa, Pisa, Italy
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Thoenen L, Giroud C, Kreuzer M, Waelchli J, Gfeller V, Deslandes-Hérold G, Mateo P, Robert CAM, Ahrens CH, Rubio-Somoza I, Bruggmann R, Erb M, Schlaeppi K. Bacterial tolerance to host-exuded specialized metabolites structures the maize root microbiome. Proc Natl Acad Sci U S A 2023; 120:e2310134120. [PMID: 37878725 PMCID: PMC10622871 DOI: 10.1073/pnas.2310134120] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Accepted: 09/21/2023] [Indexed: 10/27/2023] Open
Abstract
Plants exude specialized metabolites from their roots, and these compounds are known to structure the root microbiome. However, the underlying mechanisms are poorly understood. We established a representative collection of maize root bacteria and tested their tolerance against benzoxazinoids (BXs), the dominant specialized and bioactive metabolites in the root exudates of maize plants. In vitro experiments revealed that BXs inhibited bacterial growth in a strain- and compound-dependent manner. Tolerance against these selective antimicrobial compounds depended on bacterial cell wall structure. Further, we found that native root bacteria isolated from maize tolerated the BXs better compared to nonhost Arabidopsis bacteria. This finding suggests the adaptation of the root bacteria to the specialized metabolites of their host plant. Bacterial tolerance to 6-methoxy-benzoxazolin-2-one (MBOA), the most abundant and selective antimicrobial metabolite in the maize rhizosphere, correlated significantly with the abundance of these bacteria on BX-exuding maize roots. Thus, strain-dependent tolerance to BXs largely explained the abundance pattern of bacteria on maize roots. Abundant bacteria generally tolerated MBOA, while low abundant root microbiome members were sensitive to this compound. Our findings reveal that tolerance to plant specialized metabolites is an important competence determinant for root colonization. We propose that bacterial tolerance to root-derived antimicrobial compounds is an underlying mechanism determining the structure of host-specific microbial communities.
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Affiliation(s)
- Lisa Thoenen
- Institute of Plant Sciences, University of Bern, Bern3013, Switzerland
- Department of Environmental Sciences, University of Basel, Basel4056, Switzerland
| | - Caitlin Giroud
- Department of Environmental Sciences, University of Basel, Basel4056, Switzerland
| | - Marco Kreuzer
- Interfaculty Bioinformatics Unit, University of Bern, Bern3012, Switzerland
| | - Jan Waelchli
- Department of Environmental Sciences, University of Basel, Basel4056, Switzerland
| | - Valentin Gfeller
- Institute of Plant Sciences, University of Bern, Bern3013, Switzerland
| | | | - Pierre Mateo
- Institute of Plant Sciences, University of Bern, Bern3013, Switzerland
| | | | - Christian H. Ahrens
- Method Development and Analytics, Group Molecular Ecology, Agroscope, Zürich8046, Switzerland
| | - Ignacio Rubio-Somoza
- Molecular Reprogramming and Evolution Lab, Centre for Research in Agricultural Genomics, Barcelona08193, Spain
| | - Rémy Bruggmann
- Interfaculty Bioinformatics Unit, University of Bern, Bern3012, Switzerland
| | - Matthias Erb
- Institute of Plant Sciences, University of Bern, Bern3013, Switzerland
| | - Klaus Schlaeppi
- Institute of Plant Sciences, University of Bern, Bern3013, Switzerland
- Department of Environmental Sciences, University of Basel, Basel4056, Switzerland
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Naeem A, Yu C, Wang X, Peng M, Liu Y, Liu Y. Hydroxyethyl Cellulose-Based Hydrogels as Controlled Release Carriers for Amorphous Solid Dispersion of Bioactive Components of Radix Paeonia Alba. Molecules 2023; 28:7320. [PMID: 37959739 PMCID: PMC10648136 DOI: 10.3390/molecules28217320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 10/24/2023] [Accepted: 10/26/2023] [Indexed: 11/15/2023] Open
Abstract
Radix Paeoniae Alba (RPA) has been used extensively in Chinese traditional medicine to treat gastrointestinal disorders, immune-modulating diseases, cancers, and numerous other conditions. A few of its active components include paeoniflorin, albiflorin, lactiflorin, and catechin. However, their therapeutic effectiveness is compromised by poor pharmacokinetic profiles, low oral bioavailability, short half-lives, and poor aqueous solubility. In this study, hydroxyethyl cellulose-grafted-2-acrylamido-2-methylpropane sulfonic acid (HEC-g-AMPS) hydrogels were successfully prepared for the controlled release of Radix Paeonia Alba-solid dispersion (RPA-SD). A total of 43 compounds were identified in RPA-SD using UHPLC-Q-TOF-MS analysis. The hydrogel network formation was confirmed by FTIR, TGA, DSC, XRD, and SEM. Hydrogels' swelling and drug release were slightly higher at pH 1.2 (43.31% swelling, 81.70% drug release) than at pH 7.4 (27.73% swelling, 72.46% drug release) after 48 h. The gel fraction, drug release time and mechanical strength of the hydrogels increased with increased polymer and monomer concentration. Furthermore, the hydrogels were porous (84.15% porosity) and biodegradable (8.9% weight loss per week). Moreover, the synthesized hydrogels exhibited excellent antimicrobial and antioxidative properties.
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Affiliation(s)
- Abid Naeem
- Key Laboratory of Modern Preparation of Traditional Chinese Medicines, Ministry of Education, Jiangxi University of Chinese Medicine, Nanchang 330004, China; (C.Y.); (M.P.)
- Key Laboratory of Pharmacodynamics and Quality Evaluation on Anti-Inflammatory Chinese Herbs, Jiangxi Administration of Traditional Chinese Medicine, Nanchang Medical College, Nanchang 330006, China
| | - Chengqun Yu
- Key Laboratory of Modern Preparation of Traditional Chinese Medicines, Ministry of Education, Jiangxi University of Chinese Medicine, Nanchang 330004, China; (C.Y.); (M.P.)
| | - Xiaoli Wang
- Hubei Key Laboratory of Embryonic Stem Cell Research, Taihe Hospital, Hubei University of Medicine, Shiyan 442000, China
| | - Mingyan Peng
- Key Laboratory of Modern Preparation of Traditional Chinese Medicines, Ministry of Education, Jiangxi University of Chinese Medicine, Nanchang 330004, China; (C.Y.); (M.P.)
| | - Yi Liu
- Key Laboratory of Modern Preparation of Traditional Chinese Medicines, Ministry of Education, Jiangxi University of Chinese Medicine, Nanchang 330004, China; (C.Y.); (M.P.)
| | - Yali Liu
- Key Laboratory of Pharmacodynamics and Quality Evaluation on Anti-Inflammatory Chinese Herbs, Jiangxi Administration of Traditional Chinese Medicine, Nanchang Medical College, Nanchang 330006, China
- Key Laboratory of Pharmacodynamics and Safety Evaluation, Health Commission of Jiangxi Province, Nanchang 330006, China
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46
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Saha S, Huang L, Khoso MA, Wu H, Han D, Ma X, Poudel TR, Li B, Zhu M, Lan Q, Sakib N, Wei R, Islam MZ, Zhang P, Shen H. Fine root decomposition in forest ecosystems: an ecological perspective. FRONTIERS IN PLANT SCIENCE 2023; 14:1277510. [PMID: 38023858 PMCID: PMC10643187 DOI: 10.3389/fpls.2023.1277510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 10/16/2023] [Indexed: 12/01/2023]
Abstract
Fine root decomposition is a physio-biochemical activity that is critical to the global carbon cycle (C) in forest ecosystems. It is crucial to investigate the mechanisms and factors that control fine root decomposition in forest ecosystems to understand their system-level carbon balance. This process can be influenced by several abiotic (e.g., mean annual temperature, mean annual precipitation, site elevation, stand age, salinity, soil pH) and biotic (e.g., microorganism, substrate quality) variables. Comparing decomposition rates within sites reveals positive impacts of nitrogen and phosphorus concentrations and negative effects of lignin concentration. Nevertheless, estimating the actual fine root breakdown is difficult due to inadequate methods, anthropogenic activities, and the impact of climate change. Herein, we propose that how fine root substrate and soil physiochemical characteristics interact with soil microorganisms to influence fine root decomposition. This review summarized the elements that influence this process, as well as the research methods used to investigate it. There is also need to study the influence of annual and seasonal changes affecting fine root decomposition. This cumulative evidence will provide information on temporal and spatial dynamics of forest ecosystems, and will determine how logging and reforestation affect fine root decomposition.
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Affiliation(s)
- Sudipta Saha
- College of Forestry, Northeast Forestry University, Harbin, China
| | - Lei Huang
- College of Forestry, Northeast Forestry University, Harbin, China
| | - Muneer Ahmed Khoso
- Key Laboratory of Saline-Alkali Vegetation Ecology Restoration, Ministry of Education, Department of Life Science, Northeast Forestry University, Harbin, China
| | - Haibo Wu
- College of Forestry, Northeast Forestry University, Harbin, China
- Key Laboratory of Sustainable Forest Ecosystem Management, Ministry of Education, Northeast Forestry University, Harbin, China
| | - Donghui Han
- College of Forestry, Northeast Forestry University, Harbin, China
| | - Xiao Ma
- College of Forestry, Northeast Forestry University, Harbin, China
| | - Tika Ram Poudel
- Feline Research Center of National Forestry and Grassland Administration, College of Wildlife and Protected Area, Northeast Forestry University, Harbin, China
| | - Bei Li
- College of Forestry, Northeast Forestry University, Harbin, China
| | - Meiru Zhu
- College of Forestry, Northeast Forestry University, Harbin, China
| | - Qiurui Lan
- College of Forestry, Northeast Forestry University, Harbin, China
| | - Nazmus Sakib
- College of Forestry, Northeast Forestry University, Harbin, China
| | - Ruxiao Wei
- College of Forestry, Northeast Forestry University, Harbin, China
| | - Md. Zahirul Islam
- Key Laboratory of Sustainable Forest Ecosystem Management, Ministry of Education, Northeast Forestry University, Harbin, China
| | - Peng Zhang
- College of Forestry, Northeast Forestry University, Harbin, China
- Key Laboratory of Sustainable Forest Ecosystem Management, Ministry of Education, Northeast Forestry University, Harbin, China
| | - Hailong Shen
- College of Forestry, Northeast Forestry University, Harbin, China
- State Forestry and Grassland Administration Engineering Technology Research Center of Korean Pine, Harbin, China
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Subrahmaniam HJ, Lind Salomonsen C, Radutoiu S, Ehlers BK, Glasius M. Unraveling the secrets of plant roots: Simplified method for large scale root exudate sampling and analysis in Arabidopsis thaliana. OPEN RESEARCH EUROPE 2023; 3:12. [PMID: 37645513 PMCID: PMC10445920 DOI: 10.12688/openreseurope.15377.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 10/18/2023] [Indexed: 08/31/2023]
Abstract
Background Plants exude a plethora of compounds to communicate with their environment. Although much is known about above-ground plant communication, we are only beginning to fathom the complexities of below-ground chemical communication channels. Studying root-exuded compounds and their role in plant communication has been difficult due to the lack of standardized methodologies. Here, we develop an interdisciplinary workflow to explore the natural variation in root exudate chemical composition of the model plant Arabidopsis thaliana. We highlight key challenges associated with sampling strategies and develop a framework for analyzing both narrow- and broad-scale patterns of root exudate composition in a large set of natural A. thaliana accessions. Methods Our method involves cultivating individual seedlings in vitro inside a plastic mesh, followed by a short hydroponic sampling period in small quantities of ultrapure water. The mesh makes it easy to handle plants of different sizes and allows for large-scale characterization of individual plant root exudates under axenic conditions. This setup can also be easily extended for prolonged temporal exudate collection experiments. Furthermore, the short sampling time minimizes the duration of the experiment while still providing sufficient signal even with small volume of the sampling solution. We used ultra-high performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (UHPLC-QTOF-MS) for untargeted metabolic profiling, followed by tentative compound identification using MZmine3 and SIRIUS 5 software, to capture a broad overview of root exudate composition in A. thaliana accessions. Results Based on 28 replicates of the Columbia genotype (Col-0) compared with 10 random controls, MZmine3 annotated 354 metabolites to be present only in Col-0 by negative ionization. Of these, 254 compounds could be annotated by SIRIUS 5 software. Conclusions The methodology developed in this study can be used to broadly investigate the role of root exudates as chemical signals in plant belowground interactions.
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Affiliation(s)
- Harihar Jaishree Subrahmaniam
- Department of Ecoscience, Aarhus University, 8000 Aarhus C, Denmark
- Department of Chemistry, Aarhus University, 8000 Aarhus C, Denmark
- Department of Molecular Biology and Genetics - Plant Molecular Biology, Aarhus University, 8000 Aarhus C, Denmark
| | | | - Simona Radutoiu
- Department of Molecular Biology and Genetics - Plant Molecular Biology, Aarhus University, 8000 Aarhus C, Denmark
| | - Bodil K. Ehlers
- Department of Ecoscience, Aarhus University, 8000 Aarhus C, Denmark
| | - Marianne Glasius
- Department of Chemistry, Aarhus University, 8000 Aarhus C, Denmark
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48
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Raza T, Qadir MF, Khan KS, Eash NS, Yousuf M, Chatterjee S, Manzoor R, Rehman SU, Oetting JN. Unrevealing the potential of microbes in decomposition of organic matter and release of carbon in the ecosystem. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 344:118529. [PMID: 37418912 DOI: 10.1016/j.jenvman.2023.118529] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 06/13/2023] [Accepted: 06/25/2023] [Indexed: 07/09/2023]
Abstract
Organic matter decomposition is a biochemical process with consequences affecting climate change and ecosystem productivity. Once decomposition begins, C is lost as CO2 or sequestered into more recalcitrant carbon difficult to further degradation. As microbial respiration releases carbon dioxide into the atmosphere, microbes act as gatekeepers in the whole process. Microbial activities were found to be the second largest CO2 emission source in the environment after human activities (industrialization), and research investigations suggest that this may have affected climate change over the past few decades. It is crucial to note that microbes are major contributors in the whole C cycle (decomposition, transformation, and stabilization). Therefore, imbalances in the C cycle might be causing changes in the entire carbon content of the ecosystem. The significance of microbes, especially soil bacteria in the terrestrial carbon cycle requires more attention. This review focuses on the factors that affect microorganism behavior during the breakdown of organic materials. The key factors affecting the microbial degradation processes are the quality of the input material, nitrogen, temperature, and moisture content. In this review, we suggest that to address global climate change and its effects on agricultural systems and vice versa, there is a need to double-up on efforts and conduct new research studies to further evaluate the potential of microbial communities to reduce their contribution to terrestrial carbon emission.
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Affiliation(s)
- Taqi Raza
- The Biosystems Engineering & Soil Science, University of Tennessee, Knoxville, USA.
| | - Muhammad Farhan Qadir
- Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad 38040, Pakistan
| | - Khuram Shehzad Khan
- College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, China Agricultural University, Beijing 100193, China
| | - Neal S Eash
- The Biosystems Engineering & Soil Science, University of Tennessee, Knoxville, USA
| | - Muhammad Yousuf
- Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad 38040, Pakistan
| | - Sumanta Chatterjee
- USDA ARS, Hydrology and Remote Sensing Laboratory, 10300 Baltimore Avenue, Beltsville, MD 20705, USA; ICAR-National Rice Research Institute, Cuttack 753006, India
| | - Rabia Manzoor
- Land Resources Research Institute, National Agricultural Research Centre, Islamabad, Pakistan
| | - Sana Ur Rehman
- National Research Center of Intercropping, The Islamia University of Bahawalpur, Pakistan
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49
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Kertesz V, Khalid M, Retterer ST, Cahill JF. Structure-Driven Liquid Microjunction Surface-Sampling Probe Mass Spectrometry. Anal Chem 2023; 95:14521-14525. [PMID: 37738474 DOI: 10.1021/acs.analchem.3c02370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/24/2023]
Abstract
The rhizosphere is the narrow region of soil surrounding the roots of plants that is influenced by root exudates, root secretions, and associated microbial communities. This region is crucial to plant growth and development and plays a critical role in nutrient uptake, disease resistance, and soil transformation. Understanding the function of exogenous compounds in the rhizosphere starts with determining the spatiotemporal distribution of these molecular components. Using liquid microjunction surface-sampling probe mass spectrometry (LMJ-SSP-MS) and microfluidic devices with attached microporous membranes enables in situ, nondisruptive, and nondestructive spatiotemporal measurement of exogenous compounds from plant roots. However, long imaging times (>2 h) can negatively affect plant heath and limit temporal studies. Here, we present a novel strategy to optimize the number and location of sampling sites on these microporous membrane-covered microfluidic devices. This novel, "structure-driven" sampling workflow takes into consideration the channel structure of the microfluidic device to maximize sampling from the channels and minimize acquisition time (∼4× less time in some cases while providing similar chemical image accuracy), thus reducing stress on plants during in situ LMJ-SSP-MS analysis.
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Affiliation(s)
- Vilmos Kertesz
- Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6131, United States
| | - Muneeba Khalid
- Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6131, United States
| | - Scott T Retterer
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6131, United States
| | - John F Cahill
- Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6131, United States
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50
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Tiziani R, Pranter M, Valentinuzzi F, Pii Y, Luigimaria B, Cesco S, Mimmo T. Unraveling plant adaptation to single and combined nutrient deficiencies in a dicotyledonous and a monocotyledonous plant species. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2023; 335:111793. [PMID: 37454818 DOI: 10.1016/j.plantsci.2023.111793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 07/11/2023] [Accepted: 07/13/2023] [Indexed: 07/18/2023]
Abstract
Nutrient deficiencies considerably limit agricultural production worldwide. However, while single deficiencies are widely studied, combined deficiencies are poorly addressed. Hence, the aim of this paper was to study single and combined deficiencies of iron (Fe) and phosphorus (P) in barley (Hordeum vulgare) and tomato (Solanum lycopersicum). Plants were grown in hydroponics and root exudation was measured over the growing period. At harvest, root morphology and root and shoot ionome was assessed. Shoot-to-root-ratio decreased in both species and in all nutrient deficiencies, besides in -Fe tomato. Barley root growth was enhanced in plants subjected to double deficiency behaving similarly to -P, while tomato reduced root morphology parameters in all treatments. To cope with the nutrient deficiency barley exuded mostly chelants, while tomato relied on organic acids. Moreover, tomato exhibited a slight exudation increase over time not detected in barley. Overall, in none of the species the double deficiency caused a substantial increase in root exudation. Multivariate statistics emphasized that all the treatments were significantly different from each other in tomato, while in barley only -Fe was statistically different from the other treatments. Our findings highlight that the response of the studied plants in double deficiencies is not additive but plant specific.
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Affiliation(s)
- Raphael Tiziani
- Free University of Bolzano, Faculty of Agricultural, Environmental and Food Sciences, Piazza Universitá 5, 39100 Bolzano, Italy.
| | - Marion Pranter
- Free University of Bolzano, Faculty of Agricultural, Environmental and Food Sciences, Piazza Universitá 5, 39100 Bolzano, Italy
| | - Fabio Valentinuzzi
- Free University of Bolzano, Faculty of Agricultural, Environmental and Food Sciences, Piazza Universitá 5, 39100 Bolzano, Italy
| | - Youry Pii
- Free University of Bolzano, Faculty of Agricultural, Environmental and Food Sciences, Piazza Universitá 5, 39100 Bolzano, Italy
| | - Borruso Luigimaria
- Free University of Bolzano, Faculty of Agricultural, Environmental and Food Sciences, Piazza Universitá 5, 39100 Bolzano, Italy
| | - Stefano Cesco
- Free University of Bolzano, Faculty of Agricultural, Environmental and Food Sciences, Piazza Universitá 5, 39100 Bolzano, Italy
| | - Tanja Mimmo
- Free University of Bolzano, Faculty of Agricultural, Environmental and Food Sciences, Piazza Universitá 5, 39100 Bolzano, Italy; Competence Centre of Plant Health, Free University of Bolzano, Piazza Universitá 1, 39100 Bolzano, Italy
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