文献类型： 外文期刊
第一作者： Jia, Xiaolin
作者： Jia, Xiaolin;Wang, Shaoci;Liu, Tong;Wang, Lijian;Shi, Yong;Zheng, Xu;Yang, Jianping;Jia, Xiaolin;Wang, Shaoci;Liu, Tong;Wang, Lijian;Shi, Yong;Zheng, Xu;Yang, Jianping;Song, Meifang;Song, Meifang;Guo, Lin;Su, Liang;Yang, Jianping;Wang, Lijian;Su, Liang
作者机构：
关键词： Arabidopsis; blue light; phytochrome; SPA1
期刊名称：JOURNAL OF INTEGRATIVE PLANT BIOLOGY （ 影响因子：11.4； 五年影响因子：10.1 ）
ISSN： 1672-9072
年卷期： 2023 年 65 卷 4 期
页码：
收录情况： SCI
摘要： In Arabidopsis, although studies have demonstrated that phytochrome A (phyA) and phyB are involved in blue light signaling, how blue light-activated phytochromes modulate the activity of the CONSTITUTIVELY PHOTOMORPHOGENIC1 (COP1)-SUPPRESSOR OF PHYA-105 (SPA1) E3 complex remains largely unknown. Here, we show that phyA responds to early and weak blue light, whereas phyB responds to sustainable and strong blue light. Activation of both phyA and phyB by blue light inhibits SPA1 activity. Specifically, blue light irradiation promoted the nuclear import of both phytochromes to stimulate their binding to SPA1, abolishing SPA1's interaction with LONG HYPOCOTYL 5 (HY5) to release HY5, which promoted seedling photomorphogenesis.
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