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Position: Home > Articles > OsVP1 activates Sdr4 expression to control rice seed dormancy via the ABA signaling pathway The Crop Journal 2021,9 (1)

OsVP1 activates Sdr4 expression to control rice seed dormancy via the ABA signaling pathway

作者：

Wenqiang Chen;Wei Wang;Yusong Lyu;Yanjun Wu;Pingliang Huang;Shikai Hu;Xiaosheng Wei;Guiai Jiao;Zhonghua Sheng;Shaoqing Tang;Gaoneng Shao;Jianxun Lu

单位：

State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, Zhejiang, Chin;State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, Zhejiang, China;Institute of Crop Science and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, Zhejiang, China

关键词：

Rice;Pre-harvest sprouting;Seed dormancy;OsVP1;Sdr4;AB

摘要：

Pre-harvest sprouting (PHS) is a disadvantageous trait in cereal production worldwide, causing large economic losses each year. Its regulation mechanism is still unclear. We generated the Oryza sativa Viviparous1 (OsVP1) mutant using gene editing technique, which shows increased PHS compared with that of the wild type Nipponbare. OsVP1 is localized mainly in the nucleus and expressed in various tissues and organs. Expression of Seed dormancy 4 (Sdr4), a key gene controlling PHS, was sharply reduced in OsVP1 mutants. OsVP1 bound to the specific motif CACCTG in the promoter of Sdr4 and activated its expression in rice protoplasts. Overexpression of Sdr4 reduced the high seed germination rate of OsVP1 mutant cr-osvp1-1, showing that Sdr4 acts as a downstream target of OsVP1. Both OsVP1 and Sdr4 loss-of-function mutants were insensitive to exogenous ABA and employed the ABA signaling pathway in regulating seed dormancy. These findings shed light on the control of seed dormancy aimed at preventing PHS in rice. (C) 2020 Crop Science Society of China and Institute of Crop Science, CAAS. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co. Ltd.

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OsVP1 activates Sdr4 expression to control rice seed dormancy via the ABA signaling pathway

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