Recent Advances in the Roles of HSFs and HSPs in Heat Stress Response in Woody Plants

Abstract

A continuous increase in ambient temperature caused by global warming has been considered a worldwide threat. As sessile organisms, plants have evolved sophisticated heat shock response (HSR) to respond to elevated temperatures and other abiotic stresses, thereby minimizing damage and ensuring the protection of cellular homeostasis. In particular, for perennial trees, HSR is crucial for their long life cycle and development. HSR is a cell stress response that increases the number of chaperones including heat shock proteins (HSPs) to counter the negative effects on proteins caused by heat and other stresses. There are a large number of HSPs in plants, and their expression is directly regulated by a series of heat shock transcription factors (HSFs). Therefore, understanding the detailed molecular mechanisms of woody plants in response to extreme temperature is critical for exploring how woody species will be affected by climate changes. In this review article, we summarize the latest findings of the role of HSFs and HSPs in the HSR of woody species and discuss their regulatory networks and cross talk in HSR. In addition, strategies and programs for future research studies on the functions of HSFs and HSPs in the HSR of woody species are also proposed.

Transcriptome Analyses of Near Isogenic Lines Reveal Putative Drought Tolerance Controlling Genes in Wheat

“…The upregulation of CYPs under osmotic stress has been reported in many plants, including rice, sorghum, and Arabidopsis ( Gorantla et al, 2007 ; Johnson et al, 2014 ; Rao et al, 2020 ). Plant heat shock proteins (HSPs) have a key role in conferring biotic and abiotic stress tolerance ( Tian et al, 2021 ). HSPs enhance membrane stability by regulating the antioxidant enzyme system.…”

Integrative Physiological, Transcriptional, and Metabolic Analyses Provide Insights Into Response Mechanisms of Prunus persica to Autotoxicity Stress

“…Benzoic acid noticeably induced the expressions of sHSPs , HSP70 , and HSP90 , suggesting that HSPs might be closely associated with peach response to BA stress. The roles of HSPs in adjusting plant response to environmental stresses (heat, drought, salt, osmotic, and heavy metal stresses) have been reported in various plant species ( Feng et al, 2019 ; Tian et al, 2021 ). For instance, CaHsp25.9 confers pepper plants to heat, salt, and drought tolerance by enhancing the activity of antioxidant enzymes and the expression of stress-related genes ( Feng et al, 2019 ).…”

Progress in Research on the Mechanisms Underlying Chloroplast-Involved Heat Tolerance in Plants

“…HSPs are a group of heat-induced and evolutionarily conserved proteins that locate to the cytosol, chloroplast, mitochondria and nucleus, and other organelles. They are classified into a number of conserved protein families based on their molecular weight: HSP100s, HSP90s, HSP70s, HSP60s, HSP40s/DnaJ, and the small HSPs (sHSPs) [ 53 , 54 ]. As molecular chaperones, HSPs can prevent protein denaturation and aggregation, therefore improving heat tolerance of proteins [ 55 ].…”