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The Arabidopsis RGA gene encodes a transcriptional regulator repressing the gibberellin signal transduction pathway. Silverstone AL, Ciampaglio CN, Sun T. Plant Cell. 1998 Feb;10(2):155-69. ...... The recessive rga mutation is able to partially suppress phenotypic defects of the Arabidopsis gibberellin (GA) biosynthetic mutant ga1-3. Defects in stem elongation, flowering time, and leaf abaxial trichome initiation are suppressed by rga. This indicates ...... |
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The new RGA locus encodes a negative regulator of gibberellin response in Arabidopsis thaliana. Silverstone AL, Mak PY, Martinez EC, Sun TP. Genetics. 1997 Jul;146(3):1087-99. ...... homozygous) rga/gal-3 mutants are able to partially repress several defects of gal-3 including stem growth, leaf abaxial trichome initiation, flowering time, and apical dominance. The phenotype of the trigenic mutant (triple homozygous) rga/spy/gal-3 shows that rga and spy have additive effects regulating flowering time, abaxial leaf trichome initiation and apical dominance. This trigenic mutant is similar to wild type with respect to each of these developmental events. ...... |
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Genetic and molecular regulation by DELLA proteins of trichome development in Arabidopsis. Gan Y, Yu H, Peng J, Broun P. Plant Physiol. 2007 Nov;145(3):1031-42. ...... as well as the development of trichomes, which are faithful epidermal markers of shoot maturation. They modulate these developmental programs in part by antagonizing DELLA repressors of growth, GIBBERELLIC ACID INSENSITIVE (GAI) and REPRESSOR OF ga1-3 (RGA). In this study, we have probed the relative roles played by RGA, GAI, and two homologs, RGA-LIKE1 (RGL1) and RGL2, in these processes and investigated molecular mechanisms through which they influence epidermal differentiation. We ...... |