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Front. Plant Sci. | doi: 10.3389/fpls.2019.00958

Targeted control of chloroplast quality to improve plant acclimation: from protein import to degradation

 Xiaolong Yang1, Yangyang Li1,  Mingfang Qi1,  Yufeng Liu1* and Tianlai Li1*
  • 1College of Horticulture, Shenyang Agricultural University, China

The chloroplast is an important energy-producing organelle acting as an environmental sensor for the plant cell. The normal turnover of the entire damaged chloroplast and its specific components is required for efficient photosynthesis and other metabolic reactions under stress conditions. Nuclear-encoded proteins must be imported into the chloroplast through different membrane transport complexes, and the orderly protein import plays an important role in plant adaptive regulation. Under adverse environmental conditions, the damaged chloroplast or its specific components need to be degraded efficiently to ensure normal cell function. In this review, we discuss the molecular mechanism of protein import and degradation in the chloroplast. Specifically, quality control of chloroplast from protein import to degradation and associated regulatory pathways are discussed to better understand how plant adapt to environmental stress by fine-tuning chloroplast homeostasis, which will benefit breeding approaches to improve crop yield.

Keywords: chloroplast protein import, selective autophagy, Ubiquitin-26S proteasome system, chloroplast retrograde signaling, Environmental stress, chloroplast homeostasis

Received: 16 Feb 2019; Accepted: 09 Jul 2019.

Edited by:

Hongbo Gao, Beijing Forestry University, China

Reviewed by:

Saijaliisa Kangasjärvi, University of Turku, Finland
Ute Vothknecht, University of Bonn, Germany  

Copyright: © 2019 Yang, Li, Qi, Liu and Li. 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. Yufeng Liu, College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, Liaoning Province, China, lyf-3939@163.com
Prof. Tianlai Li, College of Horticulture, Shenyang Agricultural University, Shenyang, 110866, Liaoning Province, China, tianlaili@126.com