Circadian clock components in Arabidopsis II. LHY/CCA1 regulate the floral integrator gene SOC1 in both GI-dependent and -independent pathways
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概要
- 論文の詳細を見る
Two myb-related proteins, LHY and CCA1, play key roles in circadian clock function and flowering in Arabidopsis. GI mediates between LHY/CCA1 and floral activators (CO and FT) to promote flowering. The effect of GI on flowering probably involves FT-independent pathways, because ft only partially suppresses the early flowering caused by lhy cca1 or overexpression of GI (GI-ox). LFY, FT, and SOC1 integrate four flowering pathways: the photoperiod, gibberellic acid (GA), vernalization, and autonomous pathways. Roles of SOC1 and LFY in mediating between the clock and control of flowering time have not been elucidated. Here, we demonstrate that SOC1 functioned redundantly with FT to promote flowering via the LHY/CCA1/GI pathway. GI-ox and lhy cca1 increased mRNA levels of the SOC1 and gi partially suppressed the up-regulation in lhy cca1 under SD. The overexpression of LHY (lhy-1) shifted the phase of SOC1 expression, and the gi mutation did not affect the phase shift, suggesting that LHY regulates SOC1 expression both in GI-dependent and independent manners.
- 日本植物細胞分子生物学会の論文
- 2005-12-01
著者
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KAMADA Hiroshi
Institute of Biological Sciences, University of Tsukuba
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Coupland George
Max Planck Institute For Plant Breeding
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Mizoguchi Tsuyoshi
Gene Res. Center Univ. Of Tsukuba
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Mizoguchi Tsuyoshi
Institute Of Biological Sciences University Of Tsukuba
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Kamada Hiroshi
Univ. Tsukuba Ibaraki Jpn
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Oda Atsushi
Institute Of Biological Sciences University Of Tsukuba
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Kamada Hiroshi
Institute Of Biological Sciences Univ.
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Fujiwara Sumire
Institute of Biological Sciences, University of Tsukuba
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Fujiwara Sumire
Gene Research Center, University of Tsukuba
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Oda Atsushi
Gene Research Center, University of Tsukuba
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Oda Atsushi
Gene Research Center University Of Tsukuba
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Fujiwara Sumire
Gene Research Center University Of Tsukuba
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Mizoguchi Tsuyoshi
Institute Of Biological Sciences Tsukuba University
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Kamada Hiroshi
Institute Of Biological Sciences Tsukuba University
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