Molecular mechanism for the interaction between gibberellin and brassinosteroid signaling pathways in Arabidopsis.

ABSTRACT: Plant development is modulated by the convergence of multiple environmental and endogenous signals, and the mechanisms that allow the integration of different signaling pathways is currently being unveiled. A paradigmatic case is the concurrence of brassinosteroid (BR) and gibberellin (GA) signaling in the control of cell expansion during photomorphogenesis, which is supported by physiological observations in several plants but for which no molecular mechanism has been proposed. In this work, we show that the integration of these two signaling pathways occurs through the physical interaction between the DELLA protein GAI, which is a major negative regulator of the GA pathway, and BRASSINAZOLE RESISTANT1 (BZR1), a transcription factor that broadly regulates gene expression in response to BR

SUBMITTER: Gallego-Bartolome J 

PROVIDER: S-EPMC3421204 | biostudies-literature | 2012 Aug

REPOSITORIES: biostudies-literature