文章基本信息

标题：GIGANTEA gates gibberellin signaling through stabilization of the DELLA proteins in Arabidopsis
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作者：Michael Kopp ; Reinhard Moratz
期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：2019
卷号：116
期号：43
页码：21893-21899
DOI：10.1073/pnas.1913532116
出版社：The National Academy of Sciences of the United States of America
摘要：Circadian clock circuitry intersects with a plethora of signaling pathways to adequately time physiological processes to occur at the most appropriate time of the day and year. However, our mechanistic understanding of how the clockwork is wired to its output is limited. Here we uncover mechanistic connections between the core clock component GIGANTEA (GI) and hormone signaling through the modulation of key components of the transduction pathways. Specifically, we show how GI modulates gibberellin (GA) signaling through the stabilization of the DELLA proteins, which act as negative components in the signaling of this hormone. GI function within the GA pathway is required to precisely time the permissive gating of GA sensitivity, thereby determining the phase of GA-regulated physiological outputs.
关键词：circadian clock ; output oscillations ; gating ; GIGANTEA ; gibberellin signaling