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Title: | A mechanistic framework for auxin dependent Arabidopsis root hair elongation to low external phosphate |
Authors: | 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 |
Keywords: | Abiotic Auxin Arabidopsis auxin external phosphate |
Issue Date: | 2018 |
Publisher: | Nature Publishing Group |
Citation: | Nature Communications, 9(1): 1409 |
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. |
Description: | Accepted date: 16 March 2018 |
URI: | http://223.31.159.10:8080/jspui/handle/123456789/849 |
ISSN: | 2041-1723 |
Appears in Collections: | Institutional Publications |
Files in This Item:
File | Description | Size | Format | |
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Giri J_2018_2.pdf | 3.13 MB | Adobe PDF | ![]() View/Open |
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