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This article is part of the Research Topic

Sugars and Autophagy in Plants

Mini Review ARTICLE Provisionally accepted The full-text will be published soon. Notify me

Front. Plant Sci. | doi: 10.3389/fpls.2019.00359

Chloroplast degradation: Multiple routes into the vacuole

Xiaohong Zhuang1* and  Liwen Jiang1
  • 1The Chinese University of Hong Kong, China

Chloroplasts provide energy for all plants by producing sugar during photosynthesis. To adapt to various environmental and developmental cues, plants have developed specific strategies to control chloroplast homeostasis in plant cells, including chloroplast degradation during leaf senescence and the transition of chloroplasts into other types of plastids during the day-night cycle. In recent years, autophagy has emerged as an essential mechanism for selective degradation of chloroplast materials (also known as chlorophagy) into the vacuole. Different types of membrane structures have been shown to be involved in the delivery of distinct chloroplast contents. However, the underlying mechanisms for the formation of these chlorophagy-related structures and the selectivity of chloroplast proteins remain poorly understood. Here we provide a current overview on chlorophagy and discuss the possible chloroplast receptors and upstream signals in this process.

Keywords: chlorophagy, Autophagy, vacuole, chloroplast, chloroplast receptor

Received: 16 Dec 2018; Accepted: 07 Mar 2019.

Edited by:

Yuji Moriyasu, Saitama University, Japan

Reviewed by:

Judy Brusslan, California State University, Long Beach, United States
Marinus Pilon, Colorado State University, United States  

Copyright: © 2019 Zhuang and Jiang. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence: Dr. Xiaohong Zhuang, The Chinese University of Hong Kong, Shatin, Hong Kong Region, China, app333@gmail.com