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Type: Journal article
Title: Rice auxin influx carrier OsAUX1 facilitates root hair elongation in response to low external phosphate
Author: Giri, J.
Bhosale, R.
Huang, G.
Pandey, B.
Parker, H.
Zappala, S.
Yang, J.
Dievart, A.
Bureau, C.
Ljung, K.
Price, A.
Rose, T.
Larrieu, A.
Mairhofer, S.
Sturrock, C.
White, P.
Dupuy, L.
Hawkesford, M.
Perin, C.
Liang, W.
et al.
Citation: Nature communications, 2018; 9(1):1-7
Publisher: Nature
Issue Date: 2018
ISSN: 2041-1723
Statement of
Jitender Giri, Rahul Bhosale, Guoqiang Huang, Bipin K. Pandey, Helen Parker, Susan Zappala ... Dabing Zhang ... et al.
Abstract: Root traits such as root angle and hair length influence resource acquisition particularly for immobile nutrients like phosphorus (P). Here, we attempted to modify root angle in rice by disrupting the OsAUX1 auxin influx transporter gene in an effort to improve rice P acquisition efficiency. We show by X-ray microCT imaging that root angle is altered in the osaux1 mutant, causing preferential foraging in the top soil where P normally accumulates, yet surprisingly, P acquisition efficiency does not improve. Through closer investigation, we reveal that OsAUX1 also promotes root hair elongation in response to P limitation. Reporter studies reveal that auxin response increases in the root hair zone in low P environments. We demonstrate that OsAUX1 functions to mobilize auxin from the root apex to the differentiation zone where this signal promotes hair elongation when roots encounter low external P. We conclude that auxin and OsAUX1 play key roles in promoting root foraging for P in rice.
Keywords: Plants, Genetically Modified; Plant Roots; Phosphates; Indoleacetic Acids; Plant Growth Regulators; Membrane Transport Proteins; Gravitropism; Gene Expression Regulation, Plant; Stress, Physiological; Organogenesis, Plant; Oryza
Rights: This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit
RMID: 0030085580
DOI: 10.1038/s41467-018-03850-4
Appears in Collections:Agriculture, Food and Wine publications

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