Seed Germination of GA-Insensitive sleepy1 Mutants Does Not Require RGL2 Protein Disappearance in Arabidopsis(W) From: Plant Cell | Date: March 1, 2007| Author: Steber, Camille M; Ariizumi, Tohru | Copyright American Society of Plant Physiologists Mar 2007. Provided by ProQuest LLC.Copyright information

We explore the roles of gibberallin (GA) signaling genes SLEEPY1 (SLY1) and RGA-LIKE2 (RGL2) in regulation of seed germination in Arabidopsis thaliana, a plant in which the hormone GA is required for seed germination. Seed germination failure in the GA biosynthesis mutant ga1-3 is rescued by GA and by mutations in the DELLA gene RGL2, suggesting that RGL2 represses seed germination. RGL2 protein disappears before wild-type seed germination, consistent with the model that GA stimulates germina...

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