RGA & GAI: On the characterization of two DELLA plant growth repressor proteins
نویسندگان
چکیده
منابع مشابه
Della proteins and gibberellin-regulated seed germination and floral development in Arabidopsis.
RGA (repressor of ga1-3) and GAI (gibberellin insensitive) are negative regulators of plant hormone gibberellin (GA) signaling in Arabidopsis. The GA-deficient mutant ga1-3 is a nongerminating, extreme dwarf that flowers late and produces male-sterile flowers. The rga and gai null alleles interact synergistically to rescue vegetative growth and floral initiation in ga1-3, indicating that RGA an...
متن کاملGenetic and molecular regulation by DELLA proteins of trichome development in Arabidopsis.
Gibberellins (GA) are known to influence phase change in Arabidopsis (Arabidopsis thaliana) 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 rol...
متن کاملArabidopsis DELLA Protein Degradation Is Controlled by a Type-One Protein Phosphatase, TOPP4
Gibberellins (GAs) are a class of important phytohormones regulating a variety of physiological processes during normal plant growth and development. One of the major events during GA-mediated growth is the degradation of DELLA proteins, key negative regulators of GA signaling pathway. The stability of DELLA proteins is thought to be controlled by protein phosphorylation and dephosphorylation. ...
متن کاملThe DELLA motif is essential for gibberellin-induced degradation of RGA.
RGA and GAI are homologous genes that encode putative transcriptional regulators that repress gibberellin (GA) signaling in Arabidopsis. Previously we showed that the green fluorescent protein (GFP)-RGA fusion protein is localized to the nucleus in transgenic Arabidopsis, and expression of this fusion protein rescues the rga null mutation. The GA signal seems to derepress the GA response pathwa...
متن کاملGibberellins are not required for normal stem growth in Arabidopsis thaliana in the absence of GAI and RGA.
The growth of Arabidopsis thaliana is quantitatively regulated by the phytohormone gibberellin (GA) via two closely related nuclear GA-signaling components, GAI and RGA. Here we test the hypothesis that GAI and RGA function as "GA-derepressible repressors" of plant growth. One prediction of this hypothesis is that plants lacking GAI and RGA do not require GA for normal stem growth. Analysis of ...
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ژورنال
عنوان ژورنال: Journal of Proteomics & Bioinformatics
سال: 2018
ISSN: 0974-276X
DOI: 10.4172/0974-276x-c3-119