The cold response regulator CBF1 promotes Arabidopsis hypocotyl growth at ambient temperatures.

ABSTRACT: Light and temperature are two core environmental factors that coordinately regulate plant growth and survival throughout their entire life cycle. However, the mechanisms integrating light and temperature signaling pathways in plants remain poorly understood. Here, we report that CBF1, an AP2/ERF-family transcription factor essential for plant cold acclimation, promotes hypocotyl growth under ambient temperatures in Arabidopsis. We show that CBF1 increases the protein abundance of PIF4 and PIF5, two phytochrome-interacting bHLH-family transcription factors that play pivotal roles in modulating plant growth and development, by directly binding to their promoters to induce their gene expression, and by inhibiting their interaction with phyB in the light. Moreover, our data demonstrate that CB

SUBMITTER: Dong X 

PROVIDER: S-EPMC7327500 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature