GID1-mediated gibberellin signaling in plants |
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Authors: | Hirano Ko Ueguchi-Tanaka Miyako Matsuoka Makoto |
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Affiliation: | Bioscience and Biotechnology Center, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan. |
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Abstract: | Gibberellin (GA) perception is mediated by GID1 (GA-INSENSITIVE DWARF1), a receptor that shows similarity to hormone-sensitive lipases. A key event in GA signaling is the degradation of DELLA proteins, which are negative regulators of GA response that interact with GID1 in a GA-dependent manner. This GID1-DELLA GA-perception system is conserved among vascular plants but is not found in the moss Physcomitrella patens. The identification of factors in GA signaling downstream of DELLA and the development of a new concept of DELLA function beyond its role as a repressor of GA signaling are important advances. DELLA proteins appear to have at least two other distinct roles: maintaining GA homeostasis and regulating cross-talk between GA and other plant hormones. |
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