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FKF1对于Arabidopsis中的光周期特异性光信号是必不可少的

Takato Imaizumi¹, Hien G Tran, Trevor E Swartz

¹Department of Cell Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA.

|November 25, 2003

概括

蛋白结合,凯尔奇重复,F-BOX (FKF1) 蛋白质对于感知阿拉比多普西斯塔利亚纳的日长至关重要. 光调节的FKF1控制着CONSTANS (CO) 的表达,使植物能够根据季节变化定时开花.

科学领域:

植物生物学植物生物学
分子生物学分子生物学
循环节律是指循环节律的节奏.

背景情况:

生物适应季节变化,使用光周期来测量一天的长度.
在Arabidopsis thaliana中,花期的光周期控制依赖于CONSTANS (CO) 和FLOWERING LOCUS T (FT) 基因表达.
调节日长依赖CO表达的确切机制尚不清楚.

研究的目的:

研究FLAVIN-BINDING,KELCH REPEAT,F-BOX (FKF1) 蛋白在光周期学中的作用.
阐明FKF1如何在对光的反应中对CO的日间表达作出贡献.
为了确定FKF1是否充当蓝光光受体.

主要方法:

研究了FKF1在产生白天CO峰值中的功能.
研究了FKF1.1的依赖光的活性.
分析了FKF1光,氧或电压 (LOV) 域的光感应光化学.

主要成果:

FKF1对于产生白天CO峰值至关重要,这一过程依赖于光线.
FKF1 LOV域结合了flavin mononucleotide,并表现出光感应的光化学反应.
FKF1作为蓝光受体的功能介导光周期.

结论:

FKF1在Arabidopsis中的光周期时间测量中起着至关重要的作用.
FKF1表达的昼夜调节及其依赖光的功能精确地控制了CO的表达.
这种精确的CO波形控制对于Arabidopsis在区分白天长度和适应季节变化方面至关重要.

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