OSNF-YB7 INACTIVATES OSGLK1 TO INHIBIT CHLOROPHYLL BIOSYNTHESIS IN RICE EMBRYO

OsNF-YB7 inactivates OsGLK1 to inhibit chlorophyll biosynthesis in rice embryo

OsNF-YB7 inactivates OsGLK1 to inhibit chlorophyll biosynthesis in rice embryo

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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 wella color charm 050 cooling violet 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 Sneakers for Men - Grey - Canvas Mesh Athletic Running Shoes 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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