Mitigation of drought stress effects on soybean gas exchanges induced by Azospirillum brasilense and plant regulators

Bulegon, Lucas Guilherme; Guimarães, Vandeir Francisco; Battistus, Andre Gustavo; Inagaki, Adriano Mitio; Costa, Nivan B. da

doi:10.1590/1983-40632019v4952807

Cited by 7 publications

(4 citation statements)

References 33 publications

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“…3). They sequester iron from the soil and transport it across the cell membrane in plant roots, making it unavailable for other non-beneficial microbes (Bulegon et al . 2019).…”

Section: Mechanisms Of Action Of Pgprmentioning

confidence: 99%

“…3). They sequester iron from the soil and transport it across the cell membrane in plant roots, making it unavailable for other non-beneficial microbes (Bulegon et al 2019). They also make a biofilm on the surface of roots and form soil aggregates to conserve water and maintain the moisture level of soil under water-limiting conditions (Ngumbi and Kloepper 2016; Table 1).…”

Section: Mechanisms Of Action Of Pgprmentioning

confidence: 99%

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Induction of regulatory mechanisms by plant growth promoting rhizobacteria in crops facing drought stress

Tanveer

Ilyas

Akhtar

et al. 2023

Crop & Pasture Science

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Climate change and global warming are leading to severe drought stress, causing damage to crops in different regions of the world. Drought stress is an abiotic stress that interferes with major metabolic pathways, influencing mainly morphological, physiological and biochemical parameters of plants, ultimately resulting in decreased growth and yield of crops. Plants should be able to utilise available moisture efficiently, and there is a need to focus on organic and eco-friendly methods for improving crops facing drought stress. A practical approach for enhancing growth and development under stressful conditions is the application of plant growth promoting rhizobacteria (PGPR), soil microbes that help plants to cope with extreme ecological conditions. This review aims to highlight the function of various PGPR metabolites that help to mitigate water-deficit conditions. These microbes exist naturally in the rhizosphere of plants, and they enhance plant growth by several direct mechanisms such as aminocyclopropane-1-carboxylate deaminase and osmolyte production, secretion of exopolysaccharides and phytohormones, triggering of antioxidant defence mechanisms against reactive oxygen species and production of volatile organic compounds, as well as by indirect mechanisms including enhancing induced systemic resistance and pathogen suppression. This review recommends the use of PGPR for improving growth and development of crops under drought stress and supports their role as effective and sustainable bioinoculants for enhancing the growth and production of crops.

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“…3). They sequester iron from the soil and transport it across the cell membrane in plant roots, making it unavailable for other non-beneficial microbes (Bulegon et al . 2019).…”

Section: Mechanisms Of Action Of Pgprmentioning

confidence: 99%

Section: Mechanisms Of Action Of Pgprmentioning

confidence: 99%

Induction of regulatory mechanisms by plant growth promoting rhizobacteria in crops facing drought stress

Tanveer

Ilyas

Akhtar

et al. 2023

Crop & Pasture Science

View full text Add to dashboard Cite

show abstract

“…Furthermore, these inoculants are particularly beneficial in reducing abiotic and biotic stresses in developing crops ( Jambon et al, 2018 ). Several studies have highlighted the usefulness and benefits of microbe-based formulations in improving crop development and yield ( Huang et al, 2014 ; Gangwar and Singh, 2018 ; Bulegon et al, 2019 ; Evelin et al, 2019 ).…”

Section: Introductionmentioning

confidence: 99%

“…Endophytes interact with their plant hosts, generate positive reactions in their host plants in response to abiotic environmental challenges, and synthesise essential bioactive metabolites ( Khan et al, 2016 ). Several reports have described endophytic microorganisms which mediate beneficial traits/functions in their plant host ( Huang et al, 2014 ; Gangwar and Singh, 2018 ; Bulegon et al, 2019 ; Evelin et al, 2019 ).…”

Section: Introductionmentioning

confidence: 99%

Biochemical Changes in Two Barley Genotypes Inoculated With a Beneficial Fungus Trichoderma harzianum Rifai T-22 Grown in Saline Soil

Gupta

Smith²,

Natera³

et al. 2022

Front. Plant Sci.

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One of the most important environmental factors impacting crop plant productivity is soil salinity. Fungal endophytes have been characterised as biocontrol agents that help in plant productivity and induce resistance responses to several abiotic stresses, including salinity. In the salt-tolerant cereal crop barley (Hordeum vulgare L.), there is limited information about the metabolites and lipids that change in response to inoculation with fungal endophytes in saline conditions. In this study, gas chromatography coupled to mass spectrometry (GC–MS) and LC–electrospray ionisation (ESI)–quadrupole–quadrupole time of flight (QqTOF)-MS were used to determine the metabolite and lipid changes in two fungal inoculated barley genotypes with differing tolerance levels to saline conditions. The more salt-tolerant cultivar was Vlamingh and less salt tolerant was Gairdner. Trichoderma harzianum strain T-22 was used to treat these plants grown in soil under control and saline (200 mM NaCl) conditions. For both genotypes, fungus-colonised plants exposed to NaCl had greater root and shoot biomass, and better chlorophyll content than non-colonised plants, with colonised-Vlamingh performing better than uninoculated control plants. The metabolome dataset using GC–MS consisted of a total of 93 metabolites of which 74 were identified in roots of both barley genotypes as organic acids, sugars, sugar acids, sugar alcohols, amino acids, amines, and a small number of fatty acids. LC-QqTOF-MS analysis resulted in the detection of 186 lipid molecular species, classified into three major lipid classes—glycerophospholipids, glycerolipids, and sphingolipids, from roots of both genotypes. In Cultivar Vlamingh both metabolites and lipids increased with fungus and salt treatment while in Gairdner they decreased. The results from this study suggest that the metabolic pathways by which the fungus imparts salt tolerance is different for the different genotypes.

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Combating the Abiotic Stress Through Phytomicrobiome Studies

Maheshwari

Bharti

Agnihotri

et al. 2021

Phytomicrobiome Interactions and Sustainable Agriculture

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Mitigation of drought stress effects on soybean gas exchanges induced by Azospirillum brasilense and plant regulators

Cited by 7 publications

References 33 publications

Induction of regulatory mechanisms by plant growth promoting rhizobacteria in crops facing drought stress

Induction of regulatory mechanisms by plant growth promoting rhizobacteria in crops facing drought stress

Biochemical Changes in Two Barley Genotypes Inoculated With a Beneficial Fungus Trichoderma harzianum Rifai T-22 Grown in Saline Soil

Combating the Abiotic Stress Through Phytomicrobiome Studies

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