The function of heat-shock proteins in stress tolerance.

1994 ◽  
Vol 18 (6) ◽  
pp. 605-616 ◽  
Author(s):  
A Venetianer
Keyword(s):  
Heat Shock ◽  
Heat Shock Proteins ◽  
Stress Tolerance ◽  
Shock Proteins

scholarly journals Heat Shock Proteins: Dynamic Biomolecules to Counter Plant Biotic and Abiotic Stresses

2019 ◽  
Vol 20 (21) ◽  
pp. 5321 ◽  
Author(s):  
ul Haq ◽  
Khan ◽  
Ali ◽  
Khattak ◽  
Gai ◽  
...  
Keyword(s):  
Heat Shock ◽  
Heat Shock Proteins ◽  
Stress Tolerance ◽  
Abiotic Stresses ◽  
Plant Immunity ◽  
Abiotic Stress Tolerance ◽  
Special Focus ◽  
Biotic And Abiotic Stress ◽  
Biotic And Abiotic Stresses ◽  
Shock Proteins

Due to the present scenario of climate change, plants have to evolve strategies to survive and perform under a plethora of biotic and abiotic stresses, which restrict plant productivity. Maintenance of plant protein functional conformation and preventing non-native proteins from aggregation, which leads to metabolic disruption, are of prime importance. Plant heat shock proteins (HSPs), as chaperones, play a pivotal role in conferring biotic and abiotic stress tolerance. Moreover, HSP also enhances membrane stability and detoxifies the reactive oxygen species (ROS) by positively regulating the antioxidant enzymes system. Additionally, it uses ROS as a signal to molecules to induce HSP production. HSP also enhances plant immunity by the accumulation and stability of pathogenesis-related (PR) proteins under various biotic stresses. Thus, to unravel the entire plant defense system, the role of HSPs are discussed with a special focus on plant response to biotic and abiotic stresses, which will be helpful in the development of stress tolerance in plant crops.

scholarly journals Role of Heat Shock Proteins in Improving Heat Stress Tolerance in Crop Plants

2016 ◽  
pp. 283-307 ◽  
Author(s):  
Palakolanu Sudhakar Reddy ◽  
Thammineni Chakradhar ◽  
Ramesha A. Reddy ◽  
Rahul B. Nitnavare ◽  
Srikrishna Mahanty ◽  
...  
Keyword(s):  
Heat Stress ◽  
Heat Shock ◽  
Heat Shock Proteins ◽  
Stress Tolerance ◽  
Crop Plants ◽  
Heat Stress Tolerance ◽  
Shock Proteins

Stress tolerance in a yeast lipid mutant: membrane lipids influence tolerance to heat and ethanol independently of heat shock proteins and trehalose

1999 ◽  
Vol 45 (6) ◽  
pp. 472-479 ◽  
Author(s):  
Tracey M Swan ◽  
Kenneth Watson
Keyword(s):  
Heat Shock ◽  
Heat Shock Proteins ◽  
Stress Tolerance ◽  
Membrane Lipids ◽  
Membrane Damage ◽  
Membrane Lipid ◽  
Lipid Supplementation ◽  
Lipid Unsaturation ◽  
Shock Proteins ◽  
Yeast Lipid

The response of a yeast unsaturated fatty acid auxotroph, defective in Δ9-desaturase activity, to heat and ethanol stresses was examined. The most heat- and ethanol-tolerant cells had membranes enriched with oleic acid (C18:1), followed in order by cells enriched with linoleic (C18:2) and linolenic (C18:3) acids. Cells subjected to a heat shock (25-37°C for 30 min) accumulated trehalose and synthesized typical heat shock proteins. Although there were no obvious differences in protein profiles attributable to lipid supplementation of the mutant, relative protein synthesis as determined by densitometric analysis of autoradiograms suggested that hsp expression was different. However, there was no consistent relationship between the synthesis of heat shock proteins and the acquisition of thermotolerance in the lipid supplemented auxotroph or related wild type. Furthermore, trehalose accumulation was also not closely related to stress tolerance. On the other hand, the data presented indicated a more consistent role for membrane lipid composition in stress tolerance than trehalose, heat shock proteins, or ergosterol. We suggest that the sensitivity of C18:3-enriched cells to heat and ethanol may be attributable to membrane damage associated with increases in membrane fluidity and oxygen-derived free radical attack of membrane lipids.Key words: stress tolerance, yeast lipid mutant, membrane lipid unsaturation, trehalose, heat shock proteins.

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