Impact of acute heat stress on mitochondrial function, ultrastructure and cardiolipin distribution in Arabidopsis  

作　　者：Yukang Wang Ronghui Pan Jianping Hu 

机构地区：[1]College of Agriculture and Biotechnology,Zhejiang University,Hangzhou 310058,China [2]Michigan State University-Department of Energy Plant Research Laboratory and Plant Biology Department,Michigan State University,East Lansing,MI 48824,USA

出　　处：《aBIOTECH》2024年第3期362-367,共6页生物技术通报（英文版）

基　　金：supported by the National Natural Science Foundation of China(32200231);the Zhejiang Provincial Natural Science Foundation of China(LZ23C020002);the National Key Research and Development Program(2022YFD1401600)to RP;the National Science Foundation(MCB 2148206)to JH.

摘　　要：Besides providing energy to sustain life,mitochondria also play crucial roles in stress response and programmed cell death.The mitochondrial hallmark lipid,cardiolipin(CL),is essential to the maintenance of mitochondrial structure and function.However,how mitochondria and CL are involved in stress response is not as well defined in plants as in animal and yeast cells.We previously revealed a role for CL in mitochondrial fission and in heat stress response in Arabidopsis.To further determine the involvement of mitochondria and CL in plant heat response,here we treated Arabidopsis seedlings with varied lengths of acute heat stress.These treatments resulted in decreases in mitochondrial membrane potential,disruption of mitochondrial ultrastructure,accumulation of mitochondrial reactive-oxygen species(ROS),and redistribution of CL to the outer mitochondrial membrane and to a novel type of vesicle.The level of the observed changes correlated with the severeness of the heat stress,indicating the strong relevance of these processes to stress response.Our findings provide the basis for studying mechanisms underpinning the role of mitochondria and CL in plant stress response.

关 键 词：High temperature Plant heat stress response Mitochondrial membrane potential Cristae structure Cardiolipin redistribution and externalization 

分 类 号：Q94[生物学—植物学]