数字农科院2.0

Heat shock protein TaHSP17.4, a TaHOP interactor in wheat, improves plant stress tolerance

文献类型： 外文期刊

作者： Yi Xuan Wang;Tai Fei Yu;Chun Xiao Wang;Ji Tong Wei;Shuang Xi Zhang;Yong Wei Liu;Jun Chen;Yong Bin Zhou;Ming Chen;You Zhi Ma;Jin Hao Lan;Jia Cheng Zheng;Feng Li;Zhao Shi Xu

作者机构：

关键词： HSP family;Molecular mechanism;Protein interaction;Stress tolerance;Triticum aestivum L

期刊名称： International Journal of Biological Macromolecules

ISSN： 0141-8130

年卷期： 2023 年 246 卷

页码：

收录情况： SCIE（2023版）

摘要： Adaptation to drought and salt stresses is a fundamental part of plant cell physiology and is of great significance for crop production under environmental stress. Heat shock proteins (HSPs) are molecular chaperones that play a crucial role in folding, assembling, translocating, and degrading proteins. However, their underlying mechanisms and functions in stress tolerance remain elusive. Here, we identified the HSP TaHSP17.4 in wheat by analyzing the heat stress-induced transcriptome. Further analysis showed that TaHSP17.4 was significantly induced under drought, salt, and heat stress treatments. Intriguingly, yeast-two-hybrid analysis showed that TaHSP17.4 interacts with the HSP70/HSP90 organizing protein (HOP) TaHOP, which plays a significant role in linking HSP70 and HSP90. We found that TaHSP17.4- and TaHOP-overexpressing plants have a higher proline content and a lower malondialdehyde content than wild-type plants under stress conditions and display strong tolerance to drought, salt, and heat stress. Additionally, qRT-PCR analysis showed that stress-responsive genes relevant to reactive oxygen species scavenging and abscisic acid signaling pathways were significantly induced in TaHSP17.4- and TaHOP-overexpressing plants under stress conditions. Together, our findings provide insight into HSP functions in wheat and two novel candidate genes for improvement of wheat varieties.

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