Rawat, R and Schwartz, J and Jones, MA and Sairanen, I and Cheng, Y and Andersson, CR and Zhao, Y and Ljung, K and Harmer, SL (2009) REVEILLE1, a Myb-like transcription factor, integrates the circadian clock and auxin pathways. Proceedings of the National Academy of Sciences, 106 (39). pp. 16883-16888. DOI https://doi.org/10.1073/pnas.0813035106
Rawat, R and Schwartz, J and Jones, MA and Sairanen, I and Cheng, Y and Andersson, CR and Zhao, Y and Ljung, K and Harmer, SL (2009) REVEILLE1, a Myb-like transcription factor, integrates the circadian clock and auxin pathways. Proceedings of the National Academy of Sciences, 106 (39). pp. 16883-16888. DOI https://doi.org/10.1073/pnas.0813035106
Rawat, R and Schwartz, J and Jones, MA and Sairanen, I and Cheng, Y and Andersson, CR and Zhao, Y and Ljung, K and Harmer, SL (2009) REVEILLE1, a Myb-like transcription factor, integrates the circadian clock and auxin pathways. Proceedings of the National Academy of Sciences, 106 (39). pp. 16883-16888. DOI https://doi.org/10.1073/pnas.0813035106
Abstract
The circadian clock modulates expression of a large fraction of the Arabidopsis genome and affects many aspects of plant growth and development. We have discovered one way in which the circadian system regulates hormone signaling, identifying a node that links the clock and auxin networks. Auxin plays key roles in development and responses to environmental cues, in part through regulation of plant growth. We have characterized REVEILLE1 (RVE1), a Myb-like, clock-regulated transcription factor that is homologous to the central clock genes CIRCADIAN CLOCK ASSOCIATED 1 (CCA1) and LATE ELONGATED HYPOCOTYL (LHY). Despite this homology, inactivation of RVE1 does not affect circadian rhythmicity but instead causes a growth phenotype, indicating this factor is a clock output affecting plant development. CCA1 regulates growth via the bHLH transcription factors PHYTOCHROME INTERACTING FACTOR4 (PIF4) and PIF5, but RVE1 acts independently of these genes. RVE1 instead controls auxin levels, promoting free auxin production during the day but having no effect during the night. RVE1 positively regulates the expression of the auxin biosynthetic gene YUCCA8 (YUC8), providing a mechanism for its growth-promoting effects. RVE1 is therefore a node that connects two important signaling networks that coordinate plant growth with rhythmic changes in the environment.
Item Type: | Article |
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Uncontrolled Keywords: | growth control; hypocotyl; yucca |
Subjects: | Q Science > QH Natural history > QH301 Biology |
Divisions: | Faculty of Science and Health Faculty of Science and Health > Life Sciences, School of |
SWORD Depositor: | Unnamed user with email elements@essex.ac.uk |
Depositing User: | Unnamed user with email elements@essex.ac.uk |
Date Deposited: | 12 Jan 2013 12:06 |
Last Modified: | 16 May 2024 18:36 |
URI: | http://repository.essex.ac.uk/id/eprint/5081 |