文献类型： 外文期刊
作者： Chen, Weijun 1 ; Hu, Zhaotun 1 ; Yu, MengTing 3 ; Zhu, Sirui 1 ; Xing, Junjie 4 ; Song, Limei 1 ; Pu, Wenxuan 5 ; Yu, Feng 1 ;
作者机构： 1.Hunan Univ, Coll Biol, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China
2.Hunan Univ, Hunan Prov Key Lab Plant Funct Genom & Dev Regula, Changsha 410082, Hunan, Peoples R China
3.Huaihua Coll, Sch Biol & Food Engn, Key Lab Res & Utilizat Ethnomed Plant Resources H, Huaihua 418008, Peoples R China
4.Hunan Hybrid Rice Res Ctr, State Key Lab Hybrid Rice, Changsha 410125, Peoples R China
5.China Tobacco Hunan Ind Co Ltd, Technol Ctr, Changsha 410007, Peoples R China
关键词： ATG8d; autophagy activities; circadian clock; nutritional stress; TOC1
期刊名称：JOURNAL OF INTEGRATIVE PLANT BIOLOGY （ 影响因子：9.106； 五年影响因子：8.241 ）
ISSN： 1672-9072
年卷期： 2022 年 64 卷 5 期
页码：
收录情况： SCI
摘要： Extremely high or low autophagy levels disrupt plant survival under nutrient starvation. Recently, autophagy has been reported to display rhythms in animals. However, the mechanism of circadian regulation of autophagy is still unclear. Here, we observed that autophagy has a robust rhythm and that various autophagy-related genes (ATGs) are rhythmically expressed in Arabidopsis. Chromatin immunoprecipitation (ChIP) and dual-luciferase (LUC) analyses showed that the core oscillator gene TIMING OF CAB EXPRESSION 1 (TOC1) directly binds to the promoters of ATG (ATG1a, ATG2, and ATG8d) and negatively regulates autophagy activities under nutritional stress. Furthermore, autophagy defects might affect endogenous rhythms by reducing the rhythm amplitude of TOC1 and shortening the rhythm period of CIRCADIAN CLOCK-ASSOCIATED 1 (CCA1). Autophagy is essential for the circadian clock pattern in seedling development and plant sensitivity to nutritional deficiencies. Taken together, our studies reveal a plant strategy in which the TOC1-ATG axis involved in autophagy-rhythm crosstalk to fine-tune the intensity of autophagy.
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