Blue light specific and differential expression of a plastid σ factor, Sig5 in Arabidopsis thaliana

FEBS Letters

Toyoshima, Yoshinori¹  Morikawa, Kazuya¹  Tsunoyama, Yuichi²  Shiina, Takashi³ 

[1] Graduate School of Human and Environmental Studies, Kyoto University, Yoshida-nihonmatsu-cho, Sakyo-ku, Kyoto 606-8501, Japan;Radioisotope Research Center, Kyoto University, Kitashirakawa-oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan;Faculty of Human and Environment, Kyoto Prefectural University, Shimogamo, Sakyo-ku, Kyoto 606-8522, Japan

关键词: RNA polymerase;    Blue light;    σ factor;    Sig5;    psbD;   

DOI  :  10.1016/S0014-5793(02)02538-3

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

The transcription of plastid gene psbD is under the control of the BLRP (lue-ight-esponsive romoter) recognized by plastid-encoded RNA polymerase, in which nuclear-encoded σ factors play a crucial role in the promoter recognition. We examined the effects of light on mRNA levels of six different SIG genes in Arabidopsis and found that blue light extensively induced the accumulation of SIG5 transcripts, but red light did not. The blue light specificity was not observed in the accumulations of remaining five SIG genes. The blue light dependency of the SIG5 expression well explains the light-dependent behavior of the psbD BLRP.

【 授权许可】

Unknown