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.

Details

Title
A mechanistic framework for auxin dependent Arabidopsis root hair elongation to low external phosphate
Author
Bhosale, Rahul 1   VIAFID ORCID Logo  ; Giri, Jitender 2   VIAFID ORCID Logo  ; Pandey, Bipin K 2   VIAFID ORCID Logo  ; Giehl, Ricardo F H 3 ; Hartmann, Anja 3 ; Traini, Richard 1 ; Truskina, Jekaterina 4 ; Leftley, Nicola 1 ; Hanlon, Meredith 5 ; Swarup, Kamal 1 ; Rashed, Afaf 1 ; Voß, Ute 1 ; Alonso, Jose 6 ; Stepanova, Anna 6 ; Yun, Jeonga 6 ; Ljung, Karin 7   VIAFID ORCID Logo  ; Brown, Kathleen M 5   VIAFID ORCID Logo  ; Lynch, Jonathan P 8   VIAFID ORCID Logo  ; Dolan, Liam 9 ; Vernoux, Teva 10   VIAFID ORCID Logo  ; Bishopp, Anthony 1 ; Wells, Darren 1   VIAFID ORCID Logo  ; Nicolaus von Wirén 3   VIAFID ORCID Logo  ; Bennett, Malcolm J 1   VIAFID ORCID Logo  ; Swarup, Ranjan 1 

1  Plant & Crop Sciences, School of Biosciences, University of Nottingham, Nottingham, UK; Centre for Plant Integrative Biology (CPIB), University of Nottingham, Nottingham, UK 
2  Centre for Plant Integrative Biology (CPIB), University of Nottingham, Nottingham, UK; National Institute of Plant Genome Research (NIPGR), New Delhi 110067, India 
3  Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), OT Gatersleben, Stadt Seeland, Germany 
4  Plant & Crop Sciences, School of Biosciences, University of Nottingham, Nottingham, UK; Centre for Plant Integrative Biology (CPIB), University of Nottingham, Nottingham, UK; Laboratoire Reproduction et Développement des Plantes, Univ Lyon, ENS de Lyon, UCB Lyon 1, CNRS, INRA, Lyon, France 
5  Department of Plant Science, The Pennsylvania State University, University Park, PA, USA 
6  Department of Plant and Microbial Biology, NC State University, Raleigh, NC 27695, USA 
7  Umeå Plant Science Centre, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, Umeå, Sweden 
8  Plant & Crop Sciences, School of Biosciences, University of Nottingham, Nottingham, UK; Centre for Plant Integrative Biology (CPIB), University of Nottingham, Nottingham, UK; Department of Plant Science, The Pennsylvania State University, University Park, PA, USA 
9  Department of Plant Sciences, University of Oxford, Oxford, UK 
10  Laboratoire Reproduction et Développement des Plantes, Univ Lyon, ENS de Lyon, UCB Lyon 1, CNRS, INRA, Lyon, France 
Pages
1-9
Publication year
2018
Publication date
Apr 2018
Publisher
Nature Publishing Group
e-ISSN
20411723
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1038/s41467-018-03851-3
ProQuest document ID
2024453183
Copyright
© 2018. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.