Heat Shock Proteins (Hsps) Mediated Signalling Pathways During Abiotic Stress Conditions

Divya, Kummari; Bhatnagar‐Mathur, Pooja; Sharma, Kiran K.; Reddy, Palakolanu Sudhakar

doi:10.1016/b978-0-12-816451-8.00031-9

Cited by 20 publications

(11 citation statements)

References 216 publications

(239 reference statements)

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“…Regulatory proteins function in stress signal transduction by influencing the expression of downstream target genes (functional genes). These regulatory proteins include protein kinases [including mitogen activated protein kinases (MAPK), calcium dependent protein kinases (CDPK), receptor protein kinases, ribosomal protein kinases, and transcriptional regulatory protein kinases] (Tibbles and Woodgett, 1999;Wimalasekera and Scherer, 2018;Divya et al, 2019), protein phosphatases (Singh et al, 2010;Gong et al, 2018), transcription factors (TFs) (Han et al, 2014;Sun et al, 2018), and proteins involved in inorganic phosphate (Pi) turnover (Takahashi et al, 2001;Fabiańska et al, 2019). TFs bind to specific sequences in the promoters of their target genes, thereby regulating gene expression and affecting biological phenotypes (Han et al, 2019a).…”

Section: Introductionmentioning

confidence: 99%

C2H2 Zinc Finger Proteins: Master Regulators of Abiotic Stress Responses in Plants

et al. 2020

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Abiotic stresses such as drought and salinity are major environmental factors that limit crop yields. Unraveling the molecular mechanisms underlying abiotic stress resistance is crucial for improving crop performance and increasing productivity under adverse environmental conditions. Zinc finger proteins, comprising one of the largest transcription factor families, are known for their finger-like structure and their ability to bind Zn 2+ . Zinc finger proteins are categorized into nine subfamilies based on their conserved Cys and His motifs, including the Cys2/His2-type (C2H2), C3H, C3HC4, C2HC5, C4HC3, C2HC, C4, C6, and C8 subfamilies. Over the past two decades, much progress has been made in understanding the roles of C2H2 zinc finger proteins in plant growth, development, and stress signal transduction. In this review, we focus on recent progress in elucidating the structures, functions, and classifications of plant C2H2 zinc finger proteins and their roles in abiotic stress responses. FIGURE 1 | Structure of C2H2 zinc finger proteins. Structural model of the Arabidopsis C2H2 zinc finger protein STZ produced using the Protein Model Portal tool. Han et al.

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Section: Introductionmentioning

confidence: 99%

C2H2 Zinc Finger Proteins: Master Regulators of Abiotic Stress Responses in Plants

et al. 2020

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“…227 of the 369 P i stress response genes in leaves belong to cluster L5 and are involved in P i specific processes including galactolipid biosynthesis (GO:0019375), response to P i starvation (GO:0016036), and phosphate ion homeostasis (GO:0030643) ( Supplemental File 1: Table S3 ). Galactolipid membrane remodeling is a well-documented response to P i deficiency stress in a variety of species [ 58 , 59 ] and has also been associated with disease resistance in soybean [ 60 ]. The annotations of the 21 DEGs in Figure 2 cluster L9 are associated with receptor like proteins (RLPs), leucine rich repeats (LRRs), and metal transport ( Supplemental File 1: Table S1 ).…”

Section: Discussionmentioning

confidence: 99%

Gene Expression Responses to Sequential Nutrient Deficiency Stresses in Soybean

O’Rourke

Graham

2021

IJMS

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Throughout the growing season, crops experience a multitude of short periods of various abiotic stresses. These stress events have long-term impacts on plant performance and yield. It is imperative to improve our understanding of the genes and biological processes underlying plant stress tolerance to mitigate end of season yield loss. The majority of studies examining transcriptional changes induced by stress focus on single stress events. Few studies have been performed in model or crop species to examine transcriptional responses of plants exposed to repeated or sequential stress exposure, which better reflect field conditions. In this study, we examine the transcriptional profile of soybean plants exposed to iron deficiency stress followed by phosphate deficiency stress (-Fe-Pi). Comparing this response to previous studies, we identified a core suite of genes conserved across all repeated stress exposures (-Fe-Pi, -Fe-Fe, -Pi-Pi). Additionally, we determined transcriptional response to sequential stress exposure (-Fe-Pi) involves genes usually associated with reproduction, not stress responses. These findings highlight the plasticity of the plant transcriptome and the complexity of unraveling stress response pathways.

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“…Glycine betaine is a compatible osmolyte that likely plays an important role in osmoregulation in plants subjected to extreme environmental cues, including high-temperature stress) [21,49]. Additionally, it is likely that GB activates signaling molecules such as calcium-dependent protein kinases (CDPKs) and mitogen-activated protein kinases (MAPKs) [50], which could activate stress-responsive and heat-shock transcription factor (HSF) genes [51,52]. The activated stress-responsive genes may boost the natural defense system by enhancing the activities of enzymatic antioxidants, such as superoxide dismutase (SOD), catalase (CAT), and peroxidase (POD), which may alleviate the negative impact of uncontrolled ROS causing oxidative damage triggered by heat stress) [53] (Figure 1).…”

Section: Mechanisms Of Gb-mediated Thermotolerancementioning

confidence: 99%

Role of Glycine Betaine in the Thermotolerance of Plants

2022

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As global warming progresses, agriculture will likely be impacted enormously by the increasing heat stress (HS). Hence, future crops, especially in the southern Mediterranean regions, need thermotolerance to maintain global food security. In this regard, plant scientists are searching for solutions to tackle the yield-declining impacts of HS on crop plants. Glycine betaine (GB) has received considerable attention due to its multiple roles in imparting plant abiotic stress resistance, including to high temperature. Several studies have reported GB as a key osmoprotectant in mediating several plant responses to HS, including growth, protein modifications, photosynthesis, gene expression, and oxidative defense. GB accumulation in plants under HS differs; therefore, engineering genes for GB accumulation in non-accumulating plants is a key strategy for improving HS tolerance. Exogenous application of GB has shown promise for managing HS in plants, suggesting its involvement in protecting plant cells. Even though overexpressing GB in transgenics or exogenously applying it to plants induces tolerance to HS, this phenomenon needs to be unraveled under natural field conditions to design breeding programs and generate highly thermotolerant crops. This review summarizes the current knowledge on GB involvement in plant thermotolerance and discusses knowledge gaps and future research directions for enhancing thermotolerance in economically important crop plants.

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Heat Shock Proteins (Hsps) Mediated Signalling Pathways During Abiotic Stress Conditions

Cited by 20 publications

References 216 publications

C2H2 Zinc Finger Proteins: Master Regulators of Abiotic Stress Responses in Plants

C2H2 Zinc Finger Proteins: Master Regulators of Abiotic Stress Responses in Plants

Gene Expression Responses to Sequential Nutrient Deficiency Stresses in Soybean

Role of Glycine Betaine in the Thermotolerance of Plants

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