期刊
NATURE COMMUNICATIONS
卷 9, 期 -, 页码 -出版社
NATURE PORTFOLIO
DOI: 10.1038/s41467-018-03851-3
关键词
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资金
- 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 Society [WM130021, 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]
- BBSRC [BB/P010520/1, BB/R013748/1, BB/M019837/1, BB/N013697/1, BB/G023972/1, BB/L026848/1] Funding Source: UKRI
- Royal Society [NF140287, WM130021] Funding Source: Royal Society
- Division Of Integrative Organismal Systems
- Direct For Biological Sciences [1444561] Funding Source: National Science Foundation
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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