Center for Sustainable Resource Science (CSRS), RIKEN, 351-0198 Wako, Japan.
Center for Sustainable Resource Science (CSRS), RIKEN, 351-0198 Wako, Japan.
Biochim Biophys Acta Gen Subj. 2021 Aug;1865(8):129916. doi: 10.1016/j.bbagen.2021.129916. Epub 2021 Apr 28.
Mitochondria play a central role in primary metabolism in plants as well as in heterotrophic eukaryotes. Plants must control the quality and number of mitochondria in response to a changing environment, across cell types and developmental stages. Mitophagy is defined as the degradation of mitochondria by autophagy, an evolutionarily conserved system for the removal and recycling of intracellular components. Recent studies have highlighted the importance of mitophagy in plant stress responses. This review article summarizes our current knowledge of plant mitophagy and discusses the underlying mechanisms. In plants, chloroplasts cooperate with mitochondria for energy production, and autophagy also targets chloroplasts through a process known as chlorophagy. Advances in plant autophagy studies now allow a comparative analysis of the autophagic turnover of mitochondria and chloroplasts, via the selective degradation of their soluble proteins, fragments, or entire organelles.
线粒体在植物的初级代谢以及异养真核生物中发挥着核心作用。植物必须响应不断变化的环境，在细胞类型和发育阶段控制线粒体的质量和数量。自噬体介导的线粒体降解被定义为线粒体自噬，这是一种进化上保守的用于清除和回收细胞内成分的系统。最近的研究强调了线粒体自噬在植物应激反应中的重要性。本文综述了我们目前对植物线粒体自噬的认识，并讨论了其潜在的机制。在植物中，叶绿体与线粒体合作进行能量产生，自噬也通过称为质体自噬的过程靶向叶绿体。植物自噬研究的进展现在允许通过选择性降解其可溶性蛋白、片段或整个细胞器，对线粒体和叶绿体的自噬周转率进行比较分析。
