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A mechanistic framework for auxin dependent Arabidopsis root hair elongation to low external phosphate

Giehl, Ricardo F. H.; Bhosale, Rahul; Giri, Jitender; Pandey, Bipin K.; Giehl, Ricardo F.H.; Hartmann, Anja; Traini, Richard; Truskina, Jekaterina; Leftley, Nicola; Hanlon, Meredith; Swarup, Kamal; Rashed, Afaf; Voß, Ute; Alonso, Jose; Stepanova, Anna; Yun, Jeonga; Ljung, Karin; Brown, Kathleen M.; Lynch, Jonathan P.; Dolan, Liam; Vernoux, Teva; Bishopp, Anthony; Wells, Darren; von Wirén, Nicolaus; Bennett, Malcolm J.; Swarup, Ranjan

A mechanistic framework for auxin dependent Arabidopsis root hair elongation to low external phosphate Thumbnail


Authors

Ricardo F. H. Giehl

Jitender Giri

Bipin K. Pandey

Ricardo F.H. Giehl

Anja Hartmann

Richard Traini

Jekaterina Truskina

Meredith Hanlon

Kamal Swarup

Afaf Rashed

UTE VOSS ute.voss@nottingham.ac.uk
Assistant Professor

Jose Alonso

Anna Stepanova

Jeonga Yun

Karin Ljung

Kathleen M. Brown

Jonathan P. Lynch

Liam Dolan

Teva Vernoux

ANTHONY BISHOPP Anthony.Bishopp@nottingham.ac.uk
Professor of Plant Development Biology

DARREN WELLS DARREN.WELLS@NOTTINGHAM.AC.UK
Principal Research Fellow

Nicolaus von Wirén



Abstract

Phosphate (P) is an essential macronutrient for plant growth. Roots employ adaptive mechanisms to forage for P in soil. Root hair elongation is particularly important since P is immobile. Here we report that auxin plays a critical role promoting root hair growth in Arabidopsis in response to low external P. Mutants disrupting auxin synthesis (taa1) and transport (aux1) attenuate the low P root hair response. Conversely, targeting AUX1 expression in lateral root cap and epidermal cells rescues this low P response in aux1. Hence auxin transport from the root apex to differentiation zone promotes auxin-dependent hair response to low P. Low external P results in induction of root hair expressed auxin-inducible transcription factors ARF19, RSL2, and RSL4. Mutants lacking these genes disrupt the low P root hair response. We conclude auxin synthesis, transport and response pathway components play critical roles regulating this low P root adaptive response.

Citation

Giehl, R. F. H., Bhosale, R., Giri, J., Pandey, B. K., Giehl, R. F., Hartmann, A., …Swarup, R. (2018). A mechanistic framework for auxin dependent Arabidopsis root hair elongation to low external phosphate. Nature Communications, 9(1), 1-9. https://doi.org/10.1038/s41467-018-03851-3

Journal Article Type Article
Acceptance Date Mar 16, 2018
Online Publication Date Apr 12, 2018
Publication Date Dec 1, 2018
Deposit Date Apr 12, 2018
Publicly Available Date Apr 12, 2018
Journal Nature Communications
Electronic ISSN 2041-1723
Publisher Nature Publishing Group
Peer Reviewed Peer Reviewed
Volume 9
Issue 1
Article Number 1409
Pages 1-9
DOI https://doi.org/10.1038/s41467-018-03851-3
Keywords General Biochemistry, Genetics and Molecular Biology; General Physics and Astronomy; General Chemistry
Public URL https://nottingham-repository.worktribe.com/output/924739
Publisher URL https://www.nature.com/articles/s41467-018-03851-3
Additional Information Received: 9 January 2017; Accepted: 16 March 2018; First Online: 12 April 2018; Change Date: 2 May 2018; Change Type: Correction; Change Details: The original version of this Article omitted the following from the Acknowledgements: ‘We also thank DBT-CREST BT/HRD/03/01/2002.’ This has been corrected in both the PDF and HTML versions of the Article.; : The authors declare no competing interests.
Contract Date Apr 12, 2018

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