文献类型： 外文期刊
作者： Liu, Zinan 1 ; Yang, Qianying 1 ; Wu, Pingfan 1 ; Li, Yifan 1 ; Lin, Yanni 1 ; Liu, Wanqing 1 ; Guo, Shaoying 1 ; Liu, Yunfeng 3 ; Huang, Yifeng 4 ; Xu, Peng 5 ; Qian, Yangwen 1 ; Xie, Qingjun 1 ;
作者机构： 1.South China Agr Univ, Coll Agr, State Key Lab Conservat & Utilizat Subtrop Agrobio, Key Lab Enhancing Resource Use Efficiency Crops So, Guangzhou 510642, Peoples R China
2.Guangdong Acad Agr Sci, Rice Res Inst, Guangzhou 510640, Peoples R China
3.Guangxi Univ, Coll Life Sci & Technol, State Key Lab Conservat & Utilizat Subtrop Agrobio, Nanning 530004, Peoples R China
4.Zhejiang Acad Agr Sci, Inst Crop & Nucl Technol Utilizat, Hangzhou 310001, Peoples R China
5.Chinese Acad Sci, CAS Key Lab Trop Plant Resources & Sustainable Use, Xishuangbanna Trop Bot Garden, Menglun 666303, Yunnan, Peoples R China
6.WIMI Biotechnol Co Ltd, Changzhou 213000, Peoples R China
关键词： ATG; autophagy; grain quality; grain size; rice; TGW6
期刊名称：NEW PHYTOLOGIST （ 影响因子：9.4； 五年影响因子：10.5 ）
ISSN： 0028-646X
年卷期： 2023 年
页码：
收录情况： SCI
摘要： Crop yield must increase to achieve food security in the face of a growing population and environmental deterioration. Grain size is a prime breeding target for improving grain yield and quality in crop.Here, we report that autophagy emerges as an important regulatory pathway contributing to grain size and quality in rice. Mutations of rice Autophagy-related 9b (OsATG9b) or OsATG13a causes smaller grains and increase of chalkiness, whereas overexpression of either promotes grain size and quality.We also demonstrate that THOUSAND-GRAIN WEIGHT 6 (TGW6), a superior allele that regulates grain size and quality in the rice variety Kasalath, interacts with OsATG8 via the canonical Atg8-interacting motif (AIM), and then is recruited to the autophagosome for selective degradation. In consistent, alteration of either OsATG9b or OsATG13a expression results in reciprocal modulation of TGW6 abundance during grain growth. Genetic analyses confirmed that knockout of TGW6 in either osatg9b or osatg13a mutants can partially rescue their grain size defects, indicating that TGW6 is one of the substrates for autophagy to regulate grain development.We therefore propose a potential framework for autophagy in contributing to grain size and quality in crops.
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