Characterization of Genetic Links between Two Clock-Associated Genes, GI and PRR5 in the Current Clock Model of Arabidopsis thaliana

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概要

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• The GI (GIGANTEA) and PRR5 (PSEUDO-RESPONSE REGULATOR 5) genes are crucially implicated in the Arabidopsis circadian clock. We characterized a gi prr5 double loss-of-function mutant for the first time with reference to circadian clock-associated phenotypes. The results of this study revealed the genetic linkages between GI and PRR5 in the control of free running circadian oscillation of gene expression, early photomorphogenesis and flowering time. A mathematical clock model consisting of three interactive transcriptional feedback loops has recently been proposed. The model includes the hypothetical evening Y-TOC1 feedback loop, in which “Y” is suspected to be GI and/or PRR5. This issue was also addressed in this study; perhaps GI and PRR5 are not sufficient to fulfill the Y role.

• 社団法人 日本農芸化学会の論文

著者

• Ito Shogo

  Laboratory of Molecular Microbiology, School of Agriculture, Nagoya University

• NIWA Yusuke

  Laboratory of Molecular Microbiology, School of Agriculture, Nagoya University

• YAMASHINO Takafumi

  Laboratory of Molecular Microbiology, School of Agriculture, Nagoya University

• MIZUNO Takeshi

  Laboratory of Molecular Microbiology, School of Agriculture, Nagoya University

• NAKAMICHI Norihito

  Laboratory of Molecular Microbiology, School of Agriculture, Nagoya University

• Yamashino Takafumi

  Nagoya Univ. Nagoya Jpn

• Ito Shogo

  Nagoya Univ. Nagoya Jpn

• Kawamura Hideaki

  Laboratory of Molecular Microbiology, School of Agriculture, Nagoya University

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