细胞自噬在植物高温及干旱胁迫响应中的作用机制

林思琪,刘沁松*
西华师范大学生命科学学院, 西南野生动植物资源保护教育部重点实验室, 四川南充637009

通信作者:刘沁松;E-mail: qinsongliu@126.com

摘 要:

细胞自噬(autophagy)作为植物细胞维系稳态的一种重要代谢机制, 主要通过双层膜结构的自噬小泡(autophagosome)包裹需降解物, 随后将其传递至液泡进行降解并循环再利用。诸多研究表明, 自噬在植物非生物逆境响应中发挥着重要作用。本文以高温胁迫、干旱胁迫为切入口, 综述了近年来自噬在这两种逆境应答中的作用以及分子调控机制, 以期为植物抗逆研究和分子育种提供参考。

关键词:细胞自噬; 自噬小泡; 自噬相关基因; 高温; 干旱

收稿:2020-09-23   修定:2021-04-18

资助:国家自然科学基金 ( 3 1 9 0 0 2 7 7 )和四川省科技计划 (2019YFH0130)

Role of autophagy in plant responses to heat and drought stress

LIN Siqi, LIU Qinsong*
College of Life Sciences, China West Normal University, Key Laboratory of Southwest China Wildlife Resources Conservation (Ministry of Education), Nanchong, Sichuan 637009, China

Corresponding author: LIU Qinsong; E-mail: qinsongliu@126.com

Abstract:

Autophagy is an important catabolic process to maintain cellular homeostasis in plants. Autophagic process in plants initiates with production of double membrane vesicles, termed autophagosomes that engulf the cytoplasmic components and ultimately fuse with vacuoles for cargo degradation and subsequent recycling. Accumulating evidence indicates that autophagy plays a paramount role in plant abiotic stress responses. Here we summarize recent progress on the functions and regulatory mechanisms of autophagy in heat and drought stress responses, thereby providing a collection of references for future research in plant stress biology and molecular breeding.

Key words: autophagy; autophagosome; autophagy-related gene; heat; drought

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