文献类型： 外文期刊
第一作者： Yang, Zongju
作者： Yang, Zongju;Bai, Tianqi;Niu, Baixiao;Chen, Chen;Yang, Zongju;Niu, Baixiao;Chen, Chen;E, Zhiguo
作者机构：
关键词： rice; chlorophyll biosynthesis; embryo; LEC1
期刊名称：ELIFE
ISSN： 2050-084X
年卷期： 2024 年 13 卷
页码：
收录情况： SCI
摘要： As a master regulator of seed development, Leafy Cotyledon 1 (LEC1) promotes chlorophyll (Chl) biosynthesis in Arabidopsis, but the mechanism underlying this remains poorly understood. Here, we found that loss of function of OsNF-YB7, a LEC1 homolog of rice, leads to chlorophyllous embryo, indicating that OsNF-YB7 plays an opposite role in Chl biosynthesis in rice compared with that in Arabidopsis. OsNF-YB7 regulates the expression of a group of genes responsible for Chl biosynthesis and photosynthesis by directly binding to their promoters. In addition, OsNF-YB7 interacts with Golden 2-Like 1 (OsGLK1) to inhibit the transactivation activity of OsGLK1, a key regulator of Chl biosynthesis. Moreover, OsNF-YB7 can directly repress OsGLK1 expression by recognizing its promoter in vivo, indicating the involvement of OsNF-YB7 in multiple regulatory layers of Chl biosynthesis in rice embryo. We propose that OsNF-YB7 functions as a transcriptional repressor to regulate Chl biosynthesis in rice embryo.
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