Two independent light signals cooperate in the activation of the plastid psbD blue light‐responsive promoter in Arabidopsis
- 30 July 2004
- journal article
- Published by Wiley in FEBS Letters
- Vol. 571 (1-3) , 26-30
- https://doi.org/10.1016/j.febslet.2004.06.052
Abstract
The psbD blue light-responsive promoter (BLRP), whose activation has been considered to require strong blue light, is recognized only by SIG5 among six sigma factors of plastid RNA polymerase in Arabidopsis. We found SIG5 transcript accumulation was rapidly induced after a 30-min induction time by blue light (470 nm) with an intensity threshold of 5 micromol m(-2)s(-1) through cryptochromes. Besides this weak blue light, the psbD BLRP activation required the stronger light such as 50 micromol m(-2)s(-1) irrespective of blue or red light (660 nm). Thus, the two independent light signalings, the cryptochrome-mediated signaling to induce SIG5 transcription and the stronger light-dependent signaling, cooperate to activate the psbD BLRP.Keywords
This publication has 41 references indexed in Scilit:
- Blue Light-Dependent in Vivo and in Vitro Phosphorylation of Arabidopsis Cryptochrome 1Plant Cell, 2003
- PP7 Is a Positive Regulator of Blue Light Signaling in ArabidopsisPlant Cell, 2003
- Regulation of Arabidopsis cryptochrome 2 by blue-light-dependent phosphorylationNature, 2002
- Blue light specific and differential expression of a plastid σ factor, Sig5 in Arabidopsis thalianaFEBS Letters, 2002
- Cryptochrome 1, Cryptochrome 2, and Phytochrome A Co-Activate the Chloroplast psbD Blue Light-Responsive PromoterPlant Cell, 2001
- Involvement of a Nuclear-Encoded Basic Helix-Loop-Helix Protein in Transcription of the Light-Responsive Promoter ofpsbDPlant Physiology, 2001
- Three new nuclear genes, sigD, sigE and sigF, encoding putative plastid RNA polymerase σ factors in Arabidopsis thalianaFEBS Letters, 2000
- ADP-Dependent Phosphorylation Regulates Association of a DNA-Binding Complex with the Barley Chloroplast psbDBlue-Light-Responsive Promoter1Plant Physiology, 1999
- Circadian-Regulated Transcription of thepsbD Light-Responsive Promoter in Wheat ChloroplastsPlant Physiology, 1998
- A novel light-regulated promoter is conserved in cereal and dicot chloroplasts.Plant Cell, 1992