Gibberellins (GAs) are a large family of tetracyclic, diterpenoid plant hormones that induce a wide range of plant growth responses. It has been postulated that plants have two types of GA receptors, including soluble and membrane-bound forms. Recently, it was determined that the rice GIBBERELLIN INSENSITIVE DWARF1 (GID1) gene encodes an unknown protein with similarity to the hormone-sensitive lipases that has high affinity only for biologically active GAs. Moreover, GID1 binds to SLR1, a repressor of GA signaling, in a GA-dependent manner in yeast cells. Based on these observations, it has been concluded that GID1 is a soluble receptor mediating GA signaling in rice. More recently, Arabidopsis thaliana was found to have three GID1 homologs, AtGID1a, b, and c, all of which bind GA and interact with the five Arabidopsis DELLA proteins.

中文翻译：

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赤霉素受体及其在植物赤霉素信号传导中的作用

赤霉素 (GA) 是一大类四环、二萜类植物激素，可诱导多种植物生长反应。据推测，植物具有两种类型的 GA 受体，包括可溶性和膜结合形式。最近，确定水稻 GIBBERELLIN INSENSITIVE DWARF1 (GID1) 基因编码一种未知蛋白质，该蛋白质与激素敏感性脂肪酶相似，仅对生物活性 GA 具有高亲和力。此外，GID1 在酵母细胞中以 GA 依赖性方式与 SLR1（GA 信号传导的阻遏物）结合。基于这些观察，已经得出结论，GID1 是一种可溶性受体，介导水稻中的 GA 信号传导。最近，发现拟南芥具有三个 GID1 同源物 AtGID1a、b 和 c，所有这些都与 GA 结合并与五种拟南芥 DELLA 蛋白相互作用。