A coherent transcriptional feed-forward motif model for mediating auxin-sensitive PIN3 expression during lateral root development

Qian Chen, Yang Liu, Steven Maere, Eunkyoung Lee, Gert Van Isterdael, Zidian Xie, Wei Xuan, Jessica Lucas, Valya Vassileva, Saeko Kitakura, Peter Marhavý, Krzysztof Wabnik, Niko Geldner, Eva Benková, Jie Le, Hidehiro Fukaki, Erich Grotewold, Chuanyou Li, Jiří Friml, Fred Sack, Tom Beeckman () and Steffen Vanneste ()
Additional contact information
Qian Chen: VIB
Yang Liu: VIB
Steven Maere: VIB
Eunkyoung Lee: University of British Columbia
Gert Van Isterdael: VIB
Zidian Xie: The Ohio State University
Wei Xuan: VIB
Jessica Lucas: University of British Columbia
Valya Vassileva: VIB
Saeko Kitakura: VIB
Peter Marhavý: Institute of Science and Technology Austria
Krzysztof Wabnik: VIB
Niko Geldner: UNIL-Sorge, University of Lausanne
Eva Benková: Institute of Science and Technology Austria
Jie Le: Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences
Hidehiro Fukaki: Graduate School of Science, Kobe University
Erich Grotewold: The Ohio State University
Chuanyou Li: State Key Laboratory of Plant Genomics, National Centre for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Jiří Friml: VIB
Fred Sack: University of British Columbia
Tom Beeckman: VIB
Steffen Vanneste: VIB

Nature Communications, 2015, vol. 6, issue 1, 1-12

Abstract: Abstract Multiple plant developmental processes, such as lateral root development, depend on auxin distribution patterns that are in part generated by the PIN-formed family of auxin-efflux transporters. Here we propose that AUXIN RESPONSE FACTOR7 (ARF7) and the ARF7-regulated FOUR LIPS/MYB124 (FLP) transcription factors jointly form a coherent feed-forward motif that mediates the auxin-responsive PIN3 transcription in planta to steer the early steps of lateral root formation. This regulatory mechanism might endow the PIN3 circuitry with a temporal ‘memory’ of auxin stimuli, potentially maintaining and enhancing the robustness of the auxin flux directionality during lateral root development. The cooperative action between canonical auxin signalling and other transcription factors might constitute a general mechanism by which transcriptional auxin-sensitivity can be regulated at a tissue-specific level.

Date: 2015
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DOI: 10.1038/ncomms9821

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