Funneling of gibberellin signaling by the GRAS transcription regulator scarecrow-like 3 in the Arabidopsis root.

ABSTRACT: During plant development, because no cell movement takes place, control of the timing and extent of cell division and coordination of the direction and extent of cell expansion are particularly important for growth and development. The plant hormone gibberellins (GAs) play key roles in the control of these developmental processes. However, little is known about the molecular components that integrate the generic GA signaling into a specific cell/tissue to coordinate cell division and cell expansion. Here we report that scarecrow-like 3 (SCL3), a GRAS protein, acts as a positive regulator to integrate and maintain a functional GA pathway by attenuating the DELLA repressors in the root endodermis. The tissue-specific maintenance of GA signaling in the root endodermis plays distinct roles alo

SUBMITTER: Heo JO 

PROVIDER: S-EPMC3033297 | biostudies-literature | 2011 Feb

REPOSITORIES: biostudies-literature