HY5 Contributes to Light-Regulated Root System Architecture Under a Root-Covered Culture System.

ABSTRACT: Light is essential for plant organogenesis and development. Light-regulated shoot morphogenesis has been extensively studied; however, the mechanisms by which plant roots perceive and respond to aboveground light are largely unknown, particularly because the roots of most terrestrial plants are usually located underground in darkness. To mimic natural root growth conditions, we developed a root-covered system (RCS) in which the shoots were illuminated and the plant roots could be either exposed to light or cultivated in darkness. Using the RCS, we observed that root growth of wild-type plants was significantly promoted when the roots were in darkness, whereas it was inhibited by direct light exposure. This growth change seems to be regulated by ELONGATED HYPOCOTYL 5 (HY5), a master regulat

SUBMITTER: Zhang Y 

PROVIDER: S-EPMC6892842 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature