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  您现在的位置:首页 > 科研成果 > 论文
 
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作者:
作者: Bi, Aoyue; Wang, Tao; Wang, Guangyang; Zhang, Liang; Wassie, Misganaw; Amee, Maurice; Xu, Huawei; Hu, Zhengrong; Liu, Ao; Fu, Jinmin; Chen, Liang; Hu, Tao*.  
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通讯作者: Hu, Tao*
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刊物名称: PLANT PHYSIOLOGY
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论文题目: Stress memory gene FaHSP17.8-CII controls thermotolerance via remodeling PSII and ROS signaling in tall fescue
摘要:  
摘要:
High-temperature is the most limiting factor in the growth of cool-season turfgrass. To cope with high-temperature stress, grass often adopt a memory response by remembering one past recurring stress and preparing a quicker and more robust reaction to the next stress exposure. However, little is known about how stress memory genes regulate the thermomemory response in cool-season turfgrass. Here, we characterized a transcriptional memory gene, Fa-heat shock protein 17.8 Class II (FaHSP17.8-CII) in a cool-season turfgrass species, tall fescue (Festuca arundinacea Schreb.). The thermomemory of FaHSP17.8-CII continued for more than four days and was associated with a high H3K4me3 level in tall fescue under heat stress (HS). Furthermore, heat acclimation or priming (ACC)-induced reactive oxygen species (ROS) accumulation and photosystem II (PSII) electron transport were memorable, and this memory response was controlled by FaHSP17.8-CII. In the fahsp17.8-CII mutant generated using CRISPR/Cas9, ACC+HS did not substantially block the ROS accumulation, the degeneration of chloroplast ultra-structure and the inhibition of PSII activity compared to HS alone. However, overexpression of FaHSP17.8-CII in tall fescue reduced ROS accumulation and chloroplast ultra-structure damage, and improved chlorophyll content and PSII activity under ACC+HS compared with that HS alone. These findings unveil a FaHSP17.8-CII-PSII-ROS module regulating transcriptional memory to enhance thermotolerance in cool-season turfgrass.
年: 2021
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期:
页: DOI:10.1093/plphys/kiab205
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