https://scholars.lib.ntu.edu.tw/handle/123456789/561410
Title: | FIN219, an auxin-regulated gene, defines a link between phytochrome A and the downstream regulator COP1 in light control of Arabidopsis development | Authors: | HSU-LIANG HSIEH Haruko Okamoto Mingli Wang Lay-Hong Ang Minami Matsui Horward Goodman Xing Wang Deng |
Keywords: | arabidopsis development;COP1 repressor;FIN219 gene;light control;auxin regulation;phytochrome signaling | Issue Date: | Aug-2000 | Publisher: | Centre for Biological Sciences | Journal Volume: | 14 | Journal Issue: | 15 | Start page/Pages: | 1958-1970 | Source: | Genes & Development | Abstract: | Light signals perceived by photoreceptors are transduced to negatively regulate COP1, a key repressor of photomorphogenic development. To identify genes involved in light inactivation of COP1, a genetic screen was employed to identify extragenic modifier mutations of a temperature-sensitive cop1 allele. One suppressor mutation isolated also exhibited a far-red-specific long hypocotyl phenotype in a wild-type background. Further phenotypic analyses of this new mutation, named fin219, suggested that it defines a novel phytochrome A signaling component. Genetic analysis indicated that FIN219 interacts closely with another phytochrome A signaling component, FHY1. Molecular characterization of FIN219 indicated that it encodes a cytoplasmic localized protein highly similar to the GH3 family of proteins and its expression is rapidly induced by auxin. In contrast to its loss-of-function mutant phenotype, overexpression of FIN219 results in a far-red-specific hyperphotomorphogenic response. Our data suggest that FIN219 may define a critical link for phytochrome A-mediated far-red inactivation of COP1 and a possible cross-talk juncture between auxin regulation and phytochrome signaling. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/561410 | DOI: | 10.1101/gad.14.15.1958 |
Appears in Collections: | 植物科學研究所 |
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