Function of Heat-Shock Proteins in Drought Tolerance Regulation of Plants

Augustine, Sruthy Maria

doi:10.1007/978-3-319-28899-4_7

Cited by 39 publications

(14 citation statements)

References 147 publications

(114 reference statements)

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“…HSPs, termed as molecular chaperones, stabilize proteins at intermediate stages of their formation and assist in folding, association, translocation, and degradation of the proteins across the membranes [ 66 ]. HSPs are induced by several abiotic stresses, including drought stress [ 67 ]. However, expression of several HSPs has conferred sensitivity to abiotic stresses.…”

Section: Discussionmentioning

confidence: 99%

Ectopic Expression of a Heterologous Glutaredoxin Enhances Drought Tolerance and Grain Yield in Field Grown Maize

Tamang

Sprague

Kakeshpour

et al. 2021

IJMS

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Drought stress is a major constraint in global maize production, causing almost 30–90% of the yield loss depending upon growth stage and the degree and duration of the stress. Here, we report that ectopic expression of Arabidopsis glutaredoxin S17 (AtGRXS17) in field grown maize conferred tolerance to drought stress during the reproductive stage, which is the most drought sensitive stage for seed set and, consequently, grain yield. AtGRXS17-expressing maize lines displayed higher seed set in the field, resulting in 2-fold and 1.5-fold increase in yield in comparison to the non-transgenic plants when challenged with drought stress at the tasseling and silking/pollination stages, respectively. AtGRXS17-expressing lines showed higher relative water content, higher chlorophyll content, and less hydrogen peroxide accumulation than wild-type (WT) control plants under drought conditions. AtGRXS17-expressing lines also exhibited at least 2-fold more pollen germination than WT plants under drought stress. Compared to the transgenic maize, WT controls accumulated higher amount of proline, indicating that WT plants were more stressed over the same period. The results present a robust and simple strategy for meeting rising yield demands in maize under water limiting conditions.

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Section: Discussionmentioning

confidence: 99%

Ectopic Expression of a Heterologous Glutaredoxin Enhances Drought Tolerance and Grain Yield in Field Grown Maize

Tamang

Sprague

Kakeshpour

et al. 2021

IJMS

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“…There are few genes whose expression is induced by drought independent of ABA (Kumar et al, 2018; Lata et al, 2015; Singh & Laxmi, 2015). Plants also accumulate protective biomolecules such as dehydrins, heat shock proteins (HSPs), late embryogenesis abundant (LEA) proteins, and osmolytes (sugars, trehalose, proline, and glycine betaine; Wang et al, 2010; Hayat et al, 2012; Hassan et al, 2015; Ilhan et al, 2015; Augustine, 2016; Kumar et al, 2018; Magwanga et al, 2018). NPs are reported to induce several morphological, physiological, and biochemical alterations in plants to enhance their resilience against drought stress (Alabdallah et al, 2021; Semida et al, 2021; Zahedi et al, 2021; Figure 3).…”

Section: Np‐mediated Physiological and Biochemical Mechanisms Of Drou...mentioning

confidence: 99%

Nanoparticles as potential hallmarks of drought stress tolerance in plants

Kandhol

Jain

Tripathi

2022

Physiologia Plantarum

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Plants are inevitably exposed to drought stress limiting their growth and causing yield loss, thus inciting food crises across the world. Nanoparticles (NPs) are regarded as effective and promising tools for modulation of crop yield to overcome current and future constraints in sustainable agricultural production by upgrading the plant tolerance mechanism under abiotic stress conditions, including drought. NPs exhibit alleviating effects against drought stress via induction of physiological and biochemical readjustments accompanied by modulation of gene expression involved in drought response/tolerance. NPs ameliorate drought‐induced reduction in carbon assimilation via increasing the photosynthetic activity. The improved root growth, upregulation of aquaporins, modification of intracellular water metabolism, accumulation of compatible solutes and ion homeostasis are the major mechanisms used by NPs to mitigate the osmotic stress caused by water deficit. NPs reduce water loss from leaves through stomatal closure due to fostered abscisic acid (ABA) accumulation and ameliorate oxidative stress damage by reducing reactive oxygen species and activating the antioxidant defense system. This review provides an evolutionary foundation regarding drought stress in plant life and summarizes the interactions between NPs and plants under drought. The subsequent impact of NPs on plant development and productivity and recent nanobiotechnological approaches to improve drought stress resilience are presented. On the whole, this review highlights the significance of NPs in dealing with the global problem of water scarcity faced by farmers.

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“…HSPs function as molecular chaperones, mediating protein folding, assembly, trans location, and degradation under normal and stress conditions [32]. HSPs have been re ported to be commonly induced by drought and other stresses, probably enhancing plan tolerance by re-establishing normal protein conformation and protein homeostasis [33] In drought-treated garlic leaves, 124 genes encoding HSPs were significantly upregulated including 62 class I HSPs, 22 70-kDA HSPs, 14 class II HSP-like, and other HSPs (Figure 7 and Supplementary Table S4). E3 ubiquitin ligase is the major component of the ubiquitin mediated protein degradation pathway and determines substrate specificity [34].…”

Section: Hsps and E3 Ubiquitin Ligases Were Significantly Upregulatedmentioning

confidence: 99%

Transcriptomic Changes Induced by Drought Stress in Hardneck Garlic during the Bolting/Bulbing Stage

et al. 2021

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Garlic (Allium sativum L.) is an economically important, monocotyledonous plant with a strong taste and odor. Drought stress adversely affects its growth, development, and yield, particularly during the bolting/bulbing stage. Herein we performed RNA-seq to assess transcriptomic changes induced by drought stress in bolting/bulbing hardneck garlic plants (Purple Glazer). We observed that drought stress significantly reduced photosynthesis rate, fresh weight, and leaf water content. Transcriptomic analysis of garlic leaves under normal conditions and drought stress led to the identification of 5215 differentially expressed genes (2748 up- and 2467 downregulated). The upregulated DEGs were primarily involved in “biological process”, “metabolic process”, “oxidation-reduction process”, carbohydrate and lipid metabolism, and “proteolysis”, whereas the downregulated DEGs were mainly involved in “biological process” and metabolism of various molecules. In addition, genes encoding abscisic acid biosynthetic and catabolic enzymes, heat shock proteins, and E3 ubiquitin ligases were significantly altered by drought stress, indicating involvement in drought tolerance. A further comparison with the DEGs related to salinity stress-treated garlic revealed 867 and 305 DEGs with a similar and reverse expression alteration tendency, respectively.

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Function of Heat-Shock Proteins in Drought Tolerance Regulation of Plants

Cited by 39 publications

References 147 publications

Ectopic Expression of a Heterologous Glutaredoxin Enhances Drought Tolerance and Grain Yield in Field Grown Maize

Ectopic Expression of a Heterologous Glutaredoxin Enhances Drought Tolerance and Grain Yield in Field Grown Maize

Nanoparticles as potential hallmarks of drought stress tolerance in plants

Transcriptomic Changes Induced by Drought Stress in Hardneck Garlic during the Bolting/Bulbing Stage

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