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

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Title A mechanistic framework for auxin dependent Arabidopsis root hair elongation to low external phosphate
 
Creator 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
Wirén, Nicolaus von
Bennett, Malcolm J.
Swarup, Ranjan
 
Subject Abiotic
Auxin
Arabidopsis
auxin
external phosphate
 
Description Accepted date: 16 March 2018
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.
This work was supported by the awards from the Biotechnology and Biological Sciences
Research Council [grant numbers BB/G023972/1, BB/R013748/1, BB/L026848/1,
BB/M018431/1, BB/PO16855/1, BB/M001806/1, BB/P010520/1]; the European Research
Council FUTUREROOTS Advanced Investigator grant [grant number 294729];
Leverhulme Trust [grant number RPG-2016-409]; Royal Society [grant number
WM130021, NA140281]; Newton International Fellowship (NF140287) and British
Council Newton Bhabha (228144076). This work was also supported by funds from the
University of Nottingham Future Food Beacon of Excellence Nottingham Research and
PhD+ fellowship schemes; the Interuniversity Attraction Poles Program initiated by the
Belgian Science Policy Office [P7/29]; the Swedish Governmental Agency for Innovation
Systems (VINNOVA), and the Swedish Research Council (V.R.). NSF-MCB1158181 and
a joint studentship between the University of Nottingham and Institut National de la
Recherche Agronomique (INRA). We also thank Roger Granbom (Swedish University of
Agricultural Sciences) for skilful technical assistance.
 
Date 2018-04-16T07:18:29Z
2018-04-16T07:18:29Z
2018
 
Type Article
 
Identifier Nature Communications, 9(1): 1409
2041-1723
http://223.31.159.10:8080/jspui/handle/123456789/849
https://www.nature.com/articles/s41467-018-03851-3
10.1038/s41467-018-03851-3
 
Language en_US
 
Format application/pdf
 
Publisher Nature Publishing Group