The circadian clock rephases during lateral root organ initiation in Arabidopsis thaliana

Voß, Ute; Wilson, Michael H.; Kenobi, Kim; Gould, Peter D.; Robertson, Fiona C.; Peer, Wendy A.; Lucas, Mikaël; Swarup, Kamal; Casimiro, Ilda; Holman, Tara J.; Wells, Darren M.; Péret, Benjamin; Goh, Tatsuaki; Fukaki, Hidehiro; Hodgman, T. Charlie; Laplaze, Laurent; Halliday, Karen J.; Ljung, Karin; Murphy, Angus S.; Hall, Anthony J.; Webb, Alex A. R.; Bennett, Malcolm J.

Abstract

The endogenous circadian clock enables organisms to adapt their growth and development to environmental changes. Here we describe how the circadian clock is employed to coordinate responses to the key signal auxin during lateral root (LR) emergence. In the model plant, Arabidopsis thaliana, LRs originate from a group of stem cells deep within the root, necessitating that new organs emerge through overlying root tissues. We report that the circadian clock is rephased during LR development. Metabolite and transcript profiling revealed that the circadian clock controls the levels of auxin and auxin-related genes including the auxin response repressor IAA14 and auxin oxidase AtDAO2. Plants lacking or overexpressing core clock components exhibit LR emergence defects. We conclude that the circadian clock acts to gate auxin signalling during LR development to facilitate organ emergence.

Citation

Voß, U., Wilson, M. H., Kenobi, K., Gould, P. D., Robertson, F. C., Peer, W. A., Lucas, M., Swarup, K., Casimiro, I., Holman, T. J., Wells, D. M., Péret, B., Goh, T., Fukaki, H., Hodgman, T. C., Laplaze, L., Halliday, K. J., Ljung, K., Murphy, A. S., Hall, A. J., …Bennett, M. J. (2015). The circadian clock rephases during lateral root organ initiation in Arabidopsis thaliana. Nature Communications, 6, Article 7641. https://doi.org/10.1038/ncomms8641

• Journal Article Type: Article
• Acceptance Date: May 27, 2015
• Online Publication Date: Jul 6, 2015
• Publication Date: Jul 6, 2015
• Deposit Date: Mar 30, 2017
• Publicly Available Date: Mar 30, 2017
• Journal: Nature Communications
• Electronic ISSN: 2041-1723
• Publisher: Nature Publishing Group
• Peer Reviewed: Peer Reviewed
• Volume: 6
• Article Number: 7641
• DOI: https://doi.org/10.1038/ncomms8641
• Public URL: https://nottingham-repository.worktribe.com/output/757576
• Publisher URL: http://www.nature.com/articles/ncomms8641
• Contract Date: Mar 30, 2017