The HY5-PIF regulatory module coordinates light and temperature control of photosynthetic gene transcription.

ABSTRACT: The ability to interpret daily and seasonal alterations in light and temperature signals is essential for plant survival. This is particularly important during seedling establishment when the phytochrome photoreceptors activate photosynthetic pigment production for photoautotrophic growth. Phytochromes accomplish this partly through the suppression of phytochrome interacting factors (PIFs), negative regulators of chlorophyll and carotenoid biosynthesis. While the bZIP transcription factor long hypocotyl 5 (HY5), a potent PIF antagonist, promotes photosynthetic pigment accumulation in response to light. Here we demonstrate that by directly targeting a common promoter cis-element (G-box), HY5 and PIFs form a dynamic activation-suppression transcriptional module responsive to light and temper

SUBMITTER: Toledo-Ortiz G 

PROVIDER: S-EPMC4055456 | biostudies-literature | 2014 Jun

REPOSITORIES: biostudies-literature