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

被引：7

作者：

Kawamura, Hideaki ^{[1
]}

Ito, Shogo ^{[1
]}

Yamashino, Takafumi ^{[1
]}

Niwa, Yusuke ^{[1
]}

Nakamichi, Norihito ^{[1
]}

Mizuno, Takeshi ^{[1
]}

机构：

[1] Nagoya Univ, Mol Microbiol Lab, Sch Agr, Chikusa Ku, Nagoya, Aichi 4648601, Japan

来源：

BIOSCIENCE BIOTECHNOLOGY AND BIOCHEMISTRY | 2008年 / 72卷 / 10期

关键词：

plant circadian clock; GIGANTEA; PSEUDO-RESPONSE REGULATOR;

D O I：

10.1271/bbb.80321

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

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.

引用

页码：2770 / 2774

页数：5

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