Rhizospheric and Endophytic Microorganisms and Their Role in Alleviation of Salinity Stress in Plants

Sahu, Pramod Kumar; Kumari, Nitu; Gupta, Ajay; Manzar, Nazia

doi:10.1007/978-981-16-3364-5_2

Cited by 4 publications

(3 citation statements)

References 59 publications

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“…Additionally, salinity and sodicity may significantly influence the composition of various types of microorganisms within plants and rhizosphere soils (Paul & Lade, 2014; Sahu et al, 2021). Some studies have suggested that under high salinity and sodicity conditions, the interaction between plants and rhizospheric symbiotic microorganisms may be inhibited (Choudhary et al, 2019; da Silva et al, 2022), such as rhizobia (Slattery et al, 2001) and actinobacteria (L. Liu et al, 2023; Rai, 1992).…”

Section: Discussionmentioning

confidence: 99%

Ameliorating saline‐sodic soils: A global meta‐analysis of field studies on the influence of exogenous amendments on crop yield

Wang,

Ding,

Wang

et al. 2024

Land Degrad Dev

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As the demand for food continues to rise, soil salinization and sodification pose an increasingly pressing challenge. Currently, there is a knowledge gap regarding how to effectively improve saline‐sodic soils to support sustainable agricultural production, especially the lack of systematic analysis on the effects of different amendments at a global scale. To address this gap, this study aims to explore the feasibility of using exogenous amendments to ameliorate saline‐sodic soils, conducting a global‐scale meta‐analysis based on 685 data pairs from 70 published studies. Our results showed that applying amendments to saline‐sodic soils significantly reduced electrical conductivity of saturated paste extract (ECe) by 33.0% and exchangeable sodium percentage (ESP) by 44.6%, while simultaneously increasing crop yield by 50.7%. Heterogeneity analysis further unveiled significant variations (p < 0.05) in the overall effect size, driven by factors such as initial soil properties (salinity and ESP levels), amendment type, climate and practical management conditions (application dose and experimental duration). The categorical variable analysis showed that, compared to soils with other salinization levels, the application of amendments in severe salinization soils was most effective in reducing soil ECe and enhancing crop yield. Considering the goals of mitigating soil salinity, sodicity, and increasing crop yield, the study suggests the application of mixed‐type amendments in practical settings. It is noteworthy that while extremely high doses (greater than 40 t ha−1) effectively increased crop yield, they also posed a risk of salt accumulation. In conclusion, this research offers critical insights for sustainable agriculture, guiding future work on soil health and food security in the context of global environmental challenges.

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Section: Discussionmentioning

confidence: 99%

Ameliorating saline‐sodic soils: A global meta‐analysis of field studies on the influence of exogenous amendments on crop yield

Wang,

Ding,

Wang

et al. 2024

Land Degrad Dev

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“…These bacterial strains also produced IAA, which is reported by Kumar et al (2021) to be a key inducer of seedling growth. The bacteria trigger salinity stress tolerance mechanisms of the plant (Sahu et al, 2021a). Bacillus safensis BTL5 had nutrient solubilizing and phytohormone-producing capability, which might have contributed to the salinity stress alleviation of rice plants and helped in higher nutrient uptake followed by improved utilization.…”

Section: Discussionmentioning

confidence: 99%

“…Also, enhancement of nutrient uptake by phosphate solubilizing microorganisms, zinc solubilizing microorganisms, iron quenchers, phytohormone producers/inducers, etc. could help plants grow under saline conditions ( Sahu et al., 2021a ; Jiménez-Mejía et al., 2022 ). Therefore, microbes having the potential for production of exopolysaccharides, siderophores, IAA, and solubilization of plant nutrients like phosphorus, and Zn, could guard the plants against salinity stress to some extent and supplement nutrition to keep the plants healthy.…”

Section: Introductionmentioning

confidence: 99%

Salinity alleviator bacteria in rice (Oryza sativa L.), their colonization efficacy, and synergism with melatonin

Gupta

Tiwari²,

Shukla³

et al. 2023

Front. Plant Sci.

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In this study, rhizospheric and endophytic bacteria were tested for the alleviation of salinity stress in rice. Endophytic isolates were taken from previous studies based on their salt stress-alleviating traits. The rhizospheric bacteria were isolated from rice and screened based on salt tolerance and plant growth-promoting traits. Molecular identification indicated the presence of class Gammaproteobacteria, Bacillota, and Actinomycetia. Two-two most potential isolates each from rhizospheric and endophytic bacteria were selected for in planta trials. Results showed that microbial inoculation significantly improved germination and seedling vigor under elevated salinity. The confocal scanning laser microscopy showed higher bacterial colonization in inoculated rice roots than in control. Based on this experiment, rhizospheric bacteria Brevibacterium frigoritolerans W19 and endophytic Bacillus safensis BTL5 were selected for pot trial along with a growth-inducing compound melatonin 20 ppm. Inoculation of these two bacteria improved the levels of chlorophyll, proline, phenylalanine ammonia-lyase, catalase, superoxide dismutase, polyphenol oxidase, root-shoot length, and dry weight under elevated salt concentration. The gene expression studies showed modulation of SOD1, CATa, NHX1, and PAL1 genes by the bacterial strains and melatonin application. The inoculation was found to have additive effects with 20 ppm melatonin. This enhancement in dry matter accumulation, compatible solute production, and oxidative stress regulation could help plants in mitigating the ill effects of high salinity. Exploring such a combination of microbes and inducer molecules could be potentially useful in developing stress-alleviating bioformulations.

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Application of Bacillus Species in the Alleviation of Salinity-Stressed Agricultural Soil: An Overview

Shafi,

Sharma,

Sahu

2024

Microorganisms for Sustainability

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Rhizospheric and Endophytic Microorganisms and Their Role in Alleviation of Salinity Stress in Plants

Cited by 4 publications

References 59 publications

Ameliorating saline‐sodic soils: A global meta‐analysis of field studies on the influence of exogenous amendments on crop yield

Ameliorating saline‐sodic soils: A global meta‐analysis of field studies on the influence of exogenous amendments on crop yield

Salinity alleviator bacteria in rice (Oryza sativa L.), their colonization efficacy, and synergism with melatonin

Application of Bacillus Species in the Alleviation of Salinity-Stressed Agricultural Soil: An Overview

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