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Nature Research, Nature Communications, 1(6), 2015

DOI: 10.1038/ncomms8641

Apollo - University of Cambridge Repository, 2018

DOI: 10.17863/cam.26324

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

Journal article published in 2015 by Ute Voß, Michael H. Wilson ORCID, Kim Kenobi, Peter D. Gould, Fiona C. Robertson, Wendy A. Peer, Mikaël Lucas, Kamal Swarup, Ilda Casimiro, Tara J. Holman, Darren M. Wells, Benjamin P., Benjamin P. Eacute Ret, Benjamin Peret, Tatsuaki Goh and other authors.
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

AbstractThe 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.