Circadian‐regulated expression of a nuclear‐encoded plastid σ factor gene (sigA) in wheat seedlings

FEBS Letters

Toyoshima, Yoshinori¹  Morikawa, Kazuya¹  Ito, Shinji¹  Tsunoyama, Yuichi¹  Shiina, Takashi¹  Nakahira, Yoichi¹ 

[1] Graduate School of Human and Environmental Studies, Kyoto University, Yoshida-nihonmatu-cho, Sakyo-ku, Kyoto 606-8501, Japan

关键词: Chloroplast RNA polymerase;    Circadian clock;    psbD light-responsive promotor;    psbD-C operon;    σ Factor;   

DOI  :  10.1016/S0014-5793(99)00593-1

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

The activity of a light-responsive psbD promoter in plastids is known to be regulated by a circadian clock. However, the mechanism of the circadian regulation of the psbD light-responsive promotor, which is recognized by an Escherichia coli-type RNA polymerase, is not yet known. We examined the time course of mRNA accumulation of two E. coli-type RNA polymerase subunit genes, sigA and rpoA, under a continuous light condition after 12 h light/12 h dark entrainment. Accumulation of the sigA mRNA was found to be regulated by a circadian clock, while rpoA mRNA did not show any significant oscillation throughout the experiment.

【 授权许可】

Unknown