RRC ID 3085
著者 Yamauchi Y, Takeda-Kamiya N, Hanada A, Ogawa M, Kuwahara A, Seo M, Kamiya Y, Yamaguchi S.
タイトル Contribution of gibberellin deactivation by AtGA2ox2 to the suppression of germination of dark-imbibed Arabidopsis thaliana seeds.
ジャーナル Plant Cell Physiol
Abstract Gibberellin levels in imbibed Arabidopsis thaliana seeds are regulated by light via phytochrome, presumably through regulation of gibberellin biosynthesis genes, AtGA3ox1 and AtGA3ox2, and a deactivation gene, AtGA2ox2. Here, we show that a loss-of-function ga2ox2 mutation causes an increase in GA(4) levels and partly suppresses the germination inability during dark imbibition after inactivation of phytochrome. Experiments using 2,2-dimethylGA(4), a GA(4) analog resistant to gibberellin 2-oxidase, in combination with ga2ox2 mutant seeds suggest that the efficiency of deactivation of exogenous GA(4) by AtGA2ox2 is dependent on light conditions, which partly explains phytochrome-mediated changes in gibberellin effectiveness (sensitivity) found in previous studies.
巻・号 48(3)
ページ 555-61
公開日 2007-3-1
DOI 10.1093/pcp/pcm023
PII pcm023
PMID 17289793
MeSH Arabidopsis / drug effects Arabidopsis / genetics Arabidopsis / growth & development Arabidopsis / metabolism* Darkness Genes, Plant Germination Gibberellins / metabolism* Gibberellins / pharmacology Mixed Function Oxygenases / genetics Mixed Function Oxygenases / metabolism* Mutation Phenotype
IF 4.062
引用数 64
WOS 分野 PLANT SCIENCES CELL BIOLOGY
リソース情報
シロイヌナズナ / 植物培養細胞・遺伝子 pst19225