Role of beneficial microbial gene pool in mitigating salt/nutrient stress of plants in saline soils through underground phytostimulating signalling molecules

Tiwari, Shalini; Sharma, Barkha; BISHT, Neha; Tewari, Lakshmi

doi:10.1016/j.pedsph.2022.06.029

Cited by 17 publications

(7 citation statements)

References 140 publications

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“…From a practical point of view, however, salinity adversely affects plants. Excess salts affect the uptake of nutrients and water by plants, and changes in the soil environment can affect microbial activities [ 59 ], interfering with the normal and microbe-mediated soil processes [ 60 ]. Consequently, plant growth is affected, although parts of the soil water characteristic parameters increase with salt content.…”

Section: Discussionmentioning

confidence: 99%

Interactive Effects of Microbial Fertilizer and Soil Salinity on the Hydraulic Properties of Salt-Affected Soil

Yang,

Zhang,

Chang

et al. 2024

Plants

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Significant research has been conducted on the effects of fertilizers or agents on the sustainable development of agriculture in salinization areas. By contrast, limited consideration has been given to the interactive effects of microbial fertilizer (MF) and salinity on hydraulic properties in secondary salinization soil (SS) and coastal saline soil (CS). An incubation experiment was conducted to investigate the effects of saline soil types, salinity levels (non-saline, low-salinity, and high-salinity soils), and MF amounts (32.89 g kg−1 and 0 g kg−1) on soil hydraulic properties. Applied MF improved soil water holding capacity in each saline soil compared with that in CK, and SS was higher than CS. Applied MF increased saturated moisture, field capacity, capillary fracture moisture, the wilting coefficient, and the hygroscopic coefficient by 0.02–18.91% in SS, while it was increased by 11.62–181.88% in CS. It increased soil water supply capacity in SS (except for high-salinity soil) and CS by 0.02–14.53% and 0.04–2.34%, respectively, compared with that in CK. Soil available, readily available, and unavailable water were positively correlated with MF, while soil gravity and readily available and unavailable water were positively correlated with salinity in SS. Therefore, a potential fertilization program with MF should be developed to increase hydraulic properties or mitigate the adverse effects of salinity on plants in similar SS or CS areas.

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Section: Discussionmentioning

confidence: 99%

Interactive Effects of Microbial Fertilizer and Soil Salinity on the Hydraulic Properties of Salt-Affected Soil

Yang,

Zhang,

Chang

et al. 2024

Plants

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“…Biomass plays a role in the stable adsorption of exogenous organic acids into the soil and uses the unique water retention and nutrient metabolism characteristics given by their own physical and chemical structure; together with the function of organic acids, biomass also generates added value for the formation of the physical and chemical properties and microbial diversity of saline–alkaline soil ( Abd El-Mageed et al., 2020 ; Abd El-Mageed et al., 2021 ). The effects of different organic acids and biomass materials on soil nutrient turnover and water–salt movement can lead to changes in the composition, structure, and function of soil microbial communities ( Yao et al., 2021 ; Zhang et al., 2020a ); such complex changes will be reflected back to plant productivity and the soil nutrient cycle through downward control ( Lu et al., 2020 ; Tiwari et al., 2022 ). The process and role of soil microbial diversity in regulating the feedback of “salt-tolerant herbage—coastal saline–alkaline soil” will be further studied in the future.…”

Section: Discussionmentioning

confidence: 99%

Biomass composite with exogenous organic acid addition supports the growth of sweet sorghum (Sorghum bicolor ‘Dochna’) by reducing salinity and increasing nutrient levels in coastal saline–alkaline soil

et al. 2023

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IntroductionIn coastal saline lands, organic matter is scarce and saline stress is high. Exploring the promotion effect of intervention with organic acid from biological materials on soil improvement and thus forage output and determining the related mechanism are beneficial to the potential cultivation and resourceful, high-value utilization of coastal mudflats as back-up arable land.MethodThree exogenous organic acids [humic acid (H), fulvic acid (F), and citric acid (C)] were combined with four kinds of biomass materials [cottonseed hull (CH), cow manure (CM), grass charcoal (GC), and pine needle (PN)] and applied to about 0.3% of medium-salt mudflat soil. The salinity and nutrient dynamics of the soil and the growth and physiological differences of sweet sorghum at the seedling, elongation, and heading stages were observed under different treatments to screen for efficient combinations and analyze the intrinsic causes and influencing mechanisms.ResultsThe soil salinity, nutrient dynamics, and forage grass biological yield during sweet sorghum cultivation in saline soils differed significantly (p < 0.05) depending on the type of organic acid–biomass composite applied. Citric acid–pine needle composite substantially reduced the soil salinity and increased the soil nutrient content at the seedling stage and improved the root vigor and photosynthesis of sweet sorghum by increasing its stress tolerance, allowing plant morphological restructuring for a high biological yield. The improvement effect of fulvic acid–pine needle or fulvic acid–cow manure composite was manifested at the elongation and heading stages.DiscussionCitric acid–pine needle composite promoted the growth of saline sweet sorghum seedlings, and the effect of fulvic acid–pine needle composite lasted until the middle and late stages.

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“…This is consistent with the previous research results on microbial communities in natural salt–alkali environments (Ibekwe et al, 2017; Neubauer et al, 2018; P. Singh et al, 2021). Remarkable changes in the composition, diversity, and structure of bacteria and AMF are specific adaptation strategies evolved by rhizosphere microorganisms under saline–alkaline conditions (Geng et al, 2022; Tiwari et al, 2022).…”

Section: Discussionmentioning

confidence: 99%

“…Singh et al, 2021). Remarkable changes in the composition, diversity, and structure of bacteria and AMF are specific adaptation strategies evolved by rhizosphere microorganisms under saline-alkaline conditions (Geng et al, 2022;Tiwari et al, 2022).…”

Section: Keystone Species Critical To Plant Nutrients and Growthmentioning

confidence: 99%

Microbial community in the Leymus chinensis rhizosphere associates with its high production in mild saline–alkaline grassland

Guo,

Hao

et al. 2023

Land Degrad Dev

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Leymus chinensis is a dominant grass widely distributed in Central Asia, in both saline−alkaline and non‐saline−alkaline grasslands. However, the mechanisms underlying its saline−alkaline tolerance have not been explored from the perspective of rhizosphere microbial communities. We investigated L. chinensis rhizosphere microbial communities in both saline–alkaline and non‐saline–alkaline grasslands. It was found that the biomass of L. chinensis was remarkably higher in saline–alkaline than in non‐saline–alkaline habitat and that changes in the rhizosphere bacterial and arbuscular mycorrhizal fungi (AMF) communities had a greater effect on biomass than climate, soil moisture, nutrients, and salinity. We demonstrated that the bacteria and AMF in the rhizosphere of L. chinensis grown in saline–alkaline grassland differed from those in non‐saline–alkaline grassland, and the differences were associated with soil salinity or alkalinity. The co‐occurrence networks of bacteria and AMF and bacteria–AMF interaction networks in rhizosphere were complex and connected, with more nodes and edges and a higher average degree of nodes and modularity in the saline–alkaline grassland. More complex networks promoted plant tolerance and growth under salt–alkali stress. High number of microbial keystone taxa was related to the nutrient concentration in the soil and L. chinensis leaves, and more remarkable direct effects of the bacterial and AMF keystone communities on plant nutrient concentrations were demonstrated in saline–alkaline grassland. This indicates that bacterial and AMF communities in saline–alkaline grasslands are favorable for plant growth and nutrient uptake. This study provides an accurate and beneficial source of soil microbial assemblages for future plant–microbial joint remediation of the saline–alkaline ecosystems.

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Role of beneficial microbial gene pool in mitigating salt/nutrient stress of plants in saline soils through underground phytostimulating signalling molecules

Cited by 17 publications

References 140 publications

Interactive Effects of Microbial Fertilizer and Soil Salinity on the Hydraulic Properties of Salt-Affected Soil

Interactive Effects of Microbial Fertilizer and Soil Salinity on the Hydraulic Properties of Salt-Affected Soil

Biomass composite with exogenous organic acid addition supports the growth of sweet sorghum (Sorghum bicolor ‘Dochna’) by reducing salinity and increasing nutrient levels in coastal saline–alkaline soil

Microbial community in the Leymus chinensis rhizosphere associates with its high production in mild saline–alkaline grassland

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