Reference - Detail
| RRC ID | 3085 |
|---|---|
| Author | Yamauchi Y, Takeda-Kamiya N, Hanada A, Ogawa M, Kuwahara A, Seo M, Kamiya Y, Yamaguchi S. |
| Title | Contribution of gibberellin deactivation by AtGA2ox2 to the suppression of germination of dark-imbibed Arabidopsis thaliana seeds. |
| Journal | 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. |
| Volume | 48(3) |
| Pages | 555-61 |
| Published | 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 |
| Times Cited | 64 |
| WOS Category | PLANT SCIENCES CELL BIOLOGY |
| Resource | |
| Arabidopsis / Cultured plant cells, genes | pst19225 |