| Literature DB >> 26144255 |
Ute Voß1, Michael H Wilson1, Kim Kenobi1, Peter D Gould2, Fiona C Robertson3, Wendy A Peer4, Mikaël Lucas5, Kamal Swarup1, Ilda Casimiro6, Tara J Holman1, Darren M Wells1, Benjamin Péret7, Tatsuaki Goh8, Hidehiro Fukaki9, T Charlie Hodgman1, Laurent Laplaze10, Karen J Halliday11, Karin Ljung12, Angus S Murphy13, Anthony J Hall2, Alex A R Webb3, Malcolm J Bennett1.
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.Entities:
Mesh：
Substances：
Year: 2015 PMID： 26144255 PMCID： PMC4506504 DOI： 10.1038/ncomms8641
Source DB: PubMed Journal: Nat Commun ISSN： 2041-1723 Impact factor: 14.919