A mechanistic framework for auxin dependent Arabidopsis root hair elongation to low external phosphate
In: ISSN: 2041-1723, 2018
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International audience ; 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.
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A mechanistic framework for auxin dependent Arabidopsis root hair elongation to low external phosphate
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| Autor/in / Beteiligte Person: | Bhosale, Rahul ; Giri, Jitender ; Pandey, Bipin ; Giehl, Ricardo ; 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 ; Lynch, Jonathan, P ; Dolan, Liam ; Vernoux, Teva ; Bishopp, Anthony ; Wells, Darren ; von Wirén, Nicolaus ; Bennett, Malcolm ; Swarup, Ranjan ; Leibniz Institute of Plant Genetics and Crop Plant Research Gatersleben (IPK-Gatersleben) ; Reproduction et développement des plantes (RDP) ; École normale supérieure de Lyon (ENS de Lyon)-Institut National de la Recherche Agronomique (INRA)-Université Claude Bernard Lyon 1 (UCBL) ; Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS) ; Centre for Plant Integrative Biology ; University of Nottingham, UK (UON) ; Department of Genetics ; North Carolina State University Raleigh (NC State) ; University of North Carolina System (UNC)-University of North Carolina System (UNC) ; Umea Plant Science Center (UPSC) ; Department of Forest Genetics and Plant Physiology ; Swedish University of Agricultural Sciences = Sveriges lantbruksuniversitet (SLU)-Swedish University of Agricultural Sciences = Sveriges lantbruksuniversitet (SLU) ; Department of Plant Science ; Pennsylvania State University (Penn State) ; Penn State System-Penn State System ; HiLIFE - Institute of Biotechnology Helsinki (BI) ; Helsinki Institute of Life Science (HiLIFE) ; Helsingin yliopisto = Helsingfors universitet = University of Helsinki-Helsingin yliopisto = Helsingfors universitet = University of Helsinki ; Biotechnology and Biological Sciences Research Council BB/G023972/1 BB/R013748/1 BB/L026848/1 BB/M018431/1 BB/PO16855/1 BB/M001806/1 BB/P010520/1 ; European Research Council FUTUREROOTS Advanced Investigator grant 294729 ; Leverhulme Trust RPG-2016-409 ; Royal SocietyWM130021 NA140281 ; Newton International Fellowship NF140287 ; British Council Newton Bhabha 228144076 ; University of Nottingham Future Food Beacon of Excellence Nottingham Research and PhD+ fellowship schemes ; Interuniversity Attraction Poles Program ; Belgian Science Policy Office P7/29 ; Swedish Governmental Agency for Innovation Systems (VINNOVA) ; Swedish Research Council (V.R.) ; University of Nottingham ; Institut National de la Recherche Agronomique (INRA) ; NSF-MCB1158181 |
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| Zeitschrift: | ISSN: 2041-1723, 2018 |
| Veröffentlichung: | HAL CCSD ; Nature Publishing Group, 2018 |
| Medientyp: | academicJournal |
| DOI: | 10.1038/s41467-018-03851-3 |
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