Role and Regulation of Osmolytes and ABA Interaction in Salt and Drought Stress Tolerance

Rajasheker, G.; Jawahar, G.; Naravula, Jalaja; Kumar, S. Anil; Kumari, P. Hima; Punita, D. L.; Karumanchi, Appa Rao; Reddy, Palakolanu Sudhakar; Polavarapu, Rathnagiri; Sreenivasulu, Nese; Kishor, P. B. Kavi

doi:10.1016/b978-0-12-816451-8.00026-5

Cited by 43 publications

(30 citation statements)

References 207 publications

(228 reference statements)

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“…The most effective mechanism in plants for coping with stress conditions is the biosynthesis of secondary metabolites such as phenolic compounds or osmolytes . According to the soil‐salinity problem and its negative effects, a biofertilizer capable of reducing this problem in plants is very promising.…”

Section: Discussionmentioning

confidence: 99%

“…The most effective mechanism in plants for coping with stress conditions is the biosynthesis of secondary metabolites such as phenolic compounds 32 or osmolytes. 33 According to the soilsalinity problem and its negative effects, a biofertilizer capable of reducing this problem in plants is very promising. In this sense, we suggest that biofertilization with SCCPVE07 can diminish the negative impact as a result of the potential production and biosynthesis of several phenolics acids and flavonols.…”

Section: Discussionmentioning

confidence: 99%

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Increase in phenolic compounds of Coriandrum sativum L. after the application of a Bacillus halotolerans biofertilizer

et al. 2020

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BACKGROUND There is an urgent need for a new sustainable way of satisfying the increasing demand for food worldwide. One of the main challenges is replacing chemical fertilizers with biofertilizers, which include plant root‐associated beneficial microorganisms. The present study reports, for the first time, the effects of SCCPVE07 bacterial strain with respect to improving not only plant development, but also the nutritional content and bioactive compounds content of Coriandrum sativum L., one of the most economically important crops, even for plant growth under salinity stress. RESULTS Innoculated coriander plants (C. sativum L.) showed an increase in potassium, carbon, calcium and iron content. A significant improvement in phenolic compounds contents was also observed. The contents of 5‐O‐caffeoylquinic acid, cinnamic acid, 4‐methoxy‐cinnamic acid hexoside, K‐3‐O rutinoside, Q‐3‐O‐rutinoside, Q‐3‐O‐glucoside and Q‐3‐O‐glucuronide were significantly enhanced. Moreover, an efficient bacterial root colonization and a noted growth promotion were demonstrated. Bacterial genome was sequenced and analysed. Gene coding related to Plant growth promotion (PGP) mechanisms and proteins involved in plant defence from salinity or in the metabolism of phenolic compounds, such as quercetin 2,3‐dioxygenase and phenolic acid decarboxylase, were identified. CONCLUSION The results obtained in the present study show, for the first time, the beneficial effects of the inoculation of a bacterial Bacillus halotolerans biofertilizer on coriander crops with respect to increasing the content in bioactive compounds and plant development. © 2020 Society of Chemical Industry

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Increase in phenolic compounds of Coriandrum sativum L. after the application of a Bacillus halotolerans biofertilizer

et al. 2020

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“…However, this interaction occurs without disturbing the normal structure and role of the protein (Bohnert and Shen, 1998). Compatible osmolytes are known to stabilize functional proteins, enzymes, protein complexes, and the membrane under salinity stress (Rajasheker et al, 2019). Osmotic adjustment has been shown to be an important component of stress tolerance, and the accumulation of osmoprotectants such as proline, glycine betaine, gamma-aminobutyric acid (GABA), and sugars has been regularly observed in different plant systems (Ashraf and Foolad, 2007; Chen and Jiang, 2010).…”

Section: Silicon-mediated Mechanisms Involved In Increasing Salinitymentioning

confidence: 99%

Silicon and Salinity: Crosstalk in Crop-Mediated Stress Tolerance Mechanisms

et al. 2019

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Salinity stress hinders the growth potential and productivity of crop plants by influencing photosynthesis, disturbing the osmotic and ionic concentrations, producing excessive oxidants and radicals, regulating endogenous phytohormonal functions, counteracting essential metabolic pathways, and manipulating the patterns of gene expression. In response, plants adopt counter mechanistic cascades of physio-biochemical and molecular signaling to overcome salinity stress; however, continued exposure can overwhelm the defense system, resulting in cell death and the collapse of essential apparatuses. Improving plant vigor and defense responses can thus increase plant stress tolerance and productivity. Alternatively, the quasi-essential element silicon (Si)—the second-most abundant element in the Earth’s crust—is utilized by plants and applied exogenously to combat salinity stress and improve plant growth by enhancing physiological, metabolomic, and molecular responses. In the present review, we elucidate the potential role of Si in ameliorating salinity stress in crops and the possible mechanisms underlying Si-associated stress tolerance in plants. This review also underlines the need for future research to evaluate the role of Si in salinity stress in plants and the identification of gaps in the understanding of this process as a whole at a broader field level.

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“…Plants have evolved various protective mechanisms to survive under environmental cues such as inducing accumulation of osmolytes, leading to increased water uptake, the maintenance of physiological processes [ 15 ], and the modulation of the antioxidant defense system for the fast elimination of ROS [ 16 ]. The antioxidant defense system competently removes overaccumulation of ROS by altering the activities of various vital enzymes, e.g., catalase (CAT), superoxide dismutase (SOD), ascorbate peroxidase (APX), glutathione peroxidase (GPX), glutathione reductase (GR), dehydroascorbate reductase (DHAR), and monodehydroascorbate reductase (MDHAR) [ 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Involvement of l-Cysteine Desulfhydrase and Hydrogen Sulfide in Glutathione-Induced Tolerance to Salinity by Accelerating Ascorbate-Glutathione Cycle and Glyoxalase System in Capsicum

2020

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The aim of this study is to assess the role of L-cysteine desulfhydrase (L-DES) and endogenous hydrogen sulfide (H2S) in glutathione (GSH)-induced tolerance to salinity stress (SS) in sweet pepper (Capsicum annuum L.). Two weeks after germination, before initiating SS, half of the pepper seedlings were retained for 12 h in a liquid solution containing H2S scavenger, hypotaurine (HT), or the L-DES inhibitor DL-propargylglycine (PAG). The seedlings were then exposed for three weeks to control or SS (100 mmol L−1 NaCl) and supplemented with or without GSH or GSH+NaHS (sodium hydrosulfide, H2S donor). Salinity suppressed dry biomass, leaf water potential, chlorophyll contents, maximum quantum efficiency, ascorbate, and the activities of dehydroascorbate reductase, monodehydroascorbate reductase, and glyoxalase II in plants. Contrarily, it enhanced the accumulation of hydrogen peroxide, malondialdehyde, methylglyoxal, electrolyte leakage, proline, GSH, the activities of glutathione reductase, peroxidase, catalase, superoxide dismutase, ascorbate peroxidase, glyoxalase I, and L-DES, as well as endogenous H2S content. Salinity enhanced leaf Na+ but reduced K+; however, the reverse was true with GSH application. Overall, the treatments, GSH and GSH+NaHS, effectively reversed the oxidative stress and upregulated salt tolerance in pepper plants by controlling the activities of the AsA-GSH and glyoxalase-system-related enzymes as well as the levels of osmolytes.

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Role and Regulation of Osmolytes and ABA Interaction in Salt and Drought Stress Tolerance

Cited by 43 publications

References 207 publications

Increase in phenolic compounds of Coriandrum sativum L. after the application of a Bacillus halotolerans biofertilizer

Increase in phenolic compounds of Coriandrum sativum L. after the application of a Bacillus halotolerans biofertilizer

Silicon and Salinity: Crosstalk in Crop-Mediated Stress Tolerance Mechanisms

Involvement of l-Cysteine Desulfhydrase and Hydrogen Sulfide in Glutathione-Induced Tolerance to Salinity by Accelerating Ascorbate-Glutathione Cycle and Glyoxalase System in Capsicum

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