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Potential of plant growth-promoting rhizobacteria-plant interactions in mitigating salt stress for sustainable agriculture:A review

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Pedosphere 2022年第2期32卷 223-245页

作者： kailash chand kumawat Sharon NAGPAL Poonam SHARMA Department of Microbiology Punjab Agricultural UniversityLudhianaPunjab 141004India Department of Plant Breeding and Genetics Punjab Agricultural UniversityLudhianaPunjab 141004India

Soil salinization affecting different crops is one of the serious threats to global food *** salinity affects 20%and 33%of the total cultivated and irrigated agricultural lands,respectively,and has been reported to caused a global crop production loss of 27.3 billion *** conventional approaches,such as using salt-tolerant varieties,saline soil scrapping,flushing,leaching,and adding supplements (e.g.,gypsum and lime),often fail to alleviate *** this context,developing diverse arrays of microbes enhancing crop productivity under saline soil conditions without harming soil health is *** advanced omics approaches have enabled gaining new insights into the structure and metabolic functions of plant-associated beneficial *** genera of salt-tolerating rhizobacteria ameliorating biotic and abiotic stresses have been isolated from different legumes,cereals,vegetables,and oil seeds under extreme alkaline and saline soil *** progress in rhizosphere microbiome research has revived the belief that plants may be more benefited from their association with interacting diverse microbial communities as compared with individual members in a *** the last decade,several salt-tolerating plant growth-promoting rhizobacteria (PGPR) that improve crop production under salt stress have been exploited for the reclamation of saline *** review highlights that the interaction of salt-tolerating microbes with plants improves crop productivity under salinity stress along with potential salt tolerance mechanisms involved and will open new avenues for capitalizing on cultivable diverse microbial communities to strengthen plant salt tolerance and,thus,to refine agricultural practices and production under saline conditions.

关键词： antagonistic activities antioxidant enzymes benefical microbes osmotolerance rhizosphere microbiome salt tolerance sustainable agriculture

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Co-inoculation of indigenous Pseudomonas oryzihabitans and Bradyrhizobium *** the growth,symbiotic efficacy,nutrient acquisition,and grain yield of soybean

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Pedosphere 2022年第3期32卷 438-451页

作者： kailash chand kumawat Inderjeet SINGH Sharon NAGPAL Poonam SHARMA Rajeev Kumar GUPTA Asmita SIRARI Department of Microbiology Punjab Agricultural UniversityLudhiana 141004(India) Department of Plant Breeding and Genetics Punjab Agricultural UniversityLudhiana 141004(India) Department of Soil Science Punjab Agricultural UniversityLudhiana 141004(India)

Soil microbes play a vital role in improving plant growth,crop productivity,and soil health through solubilization of essential *** investigation was conducted to access the efficacy of Bradyrhizobium ***-3 and the indigenous phosphate-solubilizing Pseudomonas oryzihabitans LSE-3 in improving the symbiosis,nutrient accumulation,and yield of *** isolate LSE-3,selected on the basis of phosphate solubilization,was screened for beneficial traits,antagonistic activities,and *** levels of indole acetic acid production(50.34±2.35μg mL^(-1)),phosphate solubilization(184.4±7.4 mg L^(-1)),biofilm formation(optical density at 560 mm,1.3896±0.04),siderophore production(121.46±1.61μg mL^(-1)),and 1-aminocyclopropane-1-carboxylate deaminase activity(0.51±0.07 mmolα-ketobutyrateμg^(-1) protein h^(-1))were significantly higher with the dual inoculants(LSBR-3 and LSE-3)than with the single inoculant *** plant growth-promoting traits of single and dual inoculants were evaluated for the synergistic effects on soybean under field *** plots treated with LSBR-3+LSE-3 exhibited improvement in seed germination,plant height,plant biomass,and chlorophyll content compared with the uninoculated *** inoculant treatments resulted in significantly higher symbiotic efficacy evidenced by increased nodulation(40.0±0.75 plant^(-1)),nodule biomass(188.52±6.29 mg plant^(-1)),and leghemoglobin content(11.02±0.83 mg g^(-1) fresh nodule),and significantly increased activities of phosphatase(75.16±3.17 and 58.77±6.08μg p-nitrophenol g^(-1) h^(-1) for alkaline and acid phosphatase,respectively)and dehydrogenase(32.66±1.92μg triphenylformazan g^(-1) h^(-1))compared with the *** inoculation with LSBR-3 and LSE-3 enhanced the uptake of macro-and micronutrients,reduced Na content in shoots,and resulted in 10.85%higher grain yield and ***$96.80 ha^(-1) higher profit compared with the *** is the first report on the effectiv

关键词： bacteria biofilm formation phosphate solubilization plant growth-promoting trait sustainable agriculture zinc solubilization

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Silicon and plant nutrition—dynamics,mechanisms of transport and role of silicon solubilizer microbiomes in sustainable agriculture:A review

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Pedosphere 2023年第4期33卷 534-555页

作者： Barkha SHARMA kailash chand kumawat Shalini TIWARI Ajay KUMAR Rouf Ahmad DAR Ummed SINGH Massimiliano CARDINALE Department of Microbiology G.B.Pant University of Agriculture&TechnologyPantnagarUttarakhand 263145(India) Department of Industrial Microbiology Jacob Institute of Biotechnology and BioengineeringSam Higginbottom University of AgricultureTechnology and Sciences(SHUATS)PrayagrajUttar Pradesh 211007(India) College of Agriculture Agriculture UniversityJodhpurBaytuBarmerRajasthan 344034(India) Department of Biological and Environmental Sciences and Technologies-DiSTeBA University of SalentoSP6 Lecce-MonteroniLecce I-73100(Italy)

Silicon(Si)is the second most abundant element in the Earth’s crust and has numerous roles in both soils and plants,although it is inaccessible to plants in its native state(insoluble silicate minerals).This inaccessibility can lead to insufficiency,which induces anomalies in plant growth and ***,Si alleviates various biotic and abiotic stresses in plants by enhancing tolerance mechanisms at different stages of uptake/deposition as a monosilicic *** utilization of conventional Si fertilizers to boost agricultural productivity in an attempt to meet the world’s ever-increasing food demand may result in surface and groundwater pollution,waterway eutrophication,soil fertility depletion,and accumulation of hazardous elements such as arsenic in *** addressing the drawbacks of chemical fertilizers,this review emphasizes an environmentally friendly alternative,namely,Si-solubilizing microorganisms(SSMs),as bioinoculants to liberate soluble Si and thus making it available to plants.A deep understanding of recent advances in the functional diversity,colonization patterns,modes of action,role in biogeochemical cycling,and plant stress tolerance of SSMs and their implementation in Si-based agrowaste management through the fabrication of nanoparticles,could help to establish a reliable tool for economically and environmentally sustainable *** this perspective,in this review,we comprehensively summarize the latest methodologies for the isolation,screening,and characterization of SSMs and Si solubilization mechanisms,including ligands(divalent cations),acids(inorganic and organic),alkali(nucleophilic attack),extracellular polysaccharides,and factors affecting them,as well as Si-mediated regulation of gene expression involved in Si uptake,transportation,and *** have critically revised the role of SSMs according to the current *** contributions of SSMs to biofertilization are still being explored;hence,we also

关键词： agrowaste management biofertilizer bioinoculant monosilicic acid plant stress silicon-solubilizing microorganism

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Optimal generation mix for frequency response adequacy in future power system

能源与人工环境(英文)

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能源与人工环境(英文) 2021年第3期2卷 243-250页

作者： Vivek Prakash kailash chand Sharma Rohit Bhakar School of Automation Banasthali VidyapithRajasthanIndia Department of Electrical Engineering NIT JalandharIndia Department of Electrical Engineering Malaviya National Institute of TechnologyJaipurIndia

Strict enforcement of government policies to integrate high generation share from renewable energy sources(RES)like wind and PV would create inevitable operational challenges for the utilities to deliver Frequency Response(FR)*** RES generation characteristics would worsen the situation for SO,to detain initial frequency deviation following the largest generation *** necessitates investigation of optimal generator combination for securing PFR adequacy with simultaneous characterization of *** this regard,this paper proposes a novel Modified Interval(MI)based optimal generation mix formulation for operation cost minimization and FR *** uncertainty is characterised by forecasted upper and lower bound,while hourly ramp needs are based on the net load *** model is assessed on one area IEEE reliability test *** of change of frequency(ROCOF)and frequency deviation are considered as network security limits to obtain optimal generation *** obtained provide,overall cost performance,PFR and optimal generation mix,without violating system security *** model would certainly assist SO,to enhance system’s inertia and PFR adequacy at short-term system operations and could be extended for long-term planning framework.

关键词： Frequency response Generation mix Inertial response Net load Primary frequency response System security Unit commitment

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