期刊
CURRENT OPINION IN PLANT BIOLOGY
卷 52, 期 -, 页码 54-60出版社
CURRENT BIOLOGY LTD
DOI: 10.1016/j.pbi.2019.07.005
关键词
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资金
- Japan Science and Technology Agency (JST) CREST Grant [JPMJCR14M5]
- Japan Society for the Promotion of Science (JSPS) KAKENHI Grant [JP17K19388, JP18H05488, JP18K14731]
Gravitropism is the directional control of plant organ growth in response to gravity. Specialized gravity-sensing cells contain amyloplasts that can change their position according to the direction of gravity. Gravity signaling, which is elicited by the relocation of amyloplasts, is a key process that redirects auxin transport from gravity-sensing cells to the lower flank of gravity-responsive organs. Despite the long history of research on plant gravitropism, a molecular detail of gravity signaling remained unexplained. Recent studies have characterized the Arabidopsis LAZY1 family genes to be key factors of gravity signaling. Furthermore, studies regarding Arabidopsis AGCVIII kinases have demonstrated the requirement of auxin transporter PIN-FORMED3 (PIN3) phosphorylation in plant gravitropism.
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