Light signal inhibits BR pathway to promote light morphogenesis mechanism revealed

Under the guidance of researcher Hou Xingliang, doctoral student Zhang Wenbin from the Agricultural and Biotechnology Research Center of the South China Botanical Garden of the Chinese Academy of Sciences revealed the important molecular mechanism of how light signals inhibit the BR pathway to promote the formation of plant light morphology.

Light is not only an energy source for plant photosynthesis, but also an important signal for plant growth and development.

Researchers through the study of Arabidopsis nuclear factor C subunit protein (NUCLEAR FACTOR-Y Subunit C, NF-YC) mutants found that under light conditions, NF-YC1/3/4/9 genes are regulated by the BR pathway An important inhibitor of hypocotyl elongation.

Through a series of molecular, biochemical and genetic evidence, the researchers revealed the dual inhibitory effects of NF-YCs on the BR synthesis and signaling pathways of plant hormones, and proposed related molecular models: Under light conditions, on the one hand, NF-YCs directly Regulate the expression of BR synthesis genes and inhibit BR synthesis; on the other hand, NF-YCs can promote the stability and activity of BIN2 through protein interaction, thereby inhibiting the BR signal pathway.

It is worth mentioning that Hou Xingliang’s team has long been engaged in the research on the function of plant hormones and NF-Y complex regulating plant growth and development.

Through in-depth research, the team has successively analyzed the molecular mechanism of NF-Y regulating plant flowering, the mechanism of NF-YB9/LEC1 regulating embryo and post-embryonic development, the role of NF-YC in GA and ABA-mediated seed germination, and NF-YC interacts with the apparent modifier HDA15 to regulate photomorphogenesis and so on.

Related paper information: org/10.