Rice actin binding protein RMD controls crown root angle in response to external phosphate

Abstract

Root angle has a major impact on acquisition of nutrients like phosphate that accumulate in topsoil and in many species; low phosphate induces shallower root growth as an adaptive response. Identifying genes and mechanisms controlling root angle is therefore of paramount importance to plant breeding. Here we show that the actin-binding protein Rice Morphology Determinant (RMD) controls root growth angle by linking actin filaments and gravity-sensing organelles termed statoliths. RMD is upregulated in response to low external phosphate and mutants lacking of RMD have steeper crown root growth angles that are unresponsive to phosphate levels. RMD protein localizes to the surface of statoliths, and rmd mutants exhibit faster gravitropic response owing to more rapid statoliths movement. We conclude that adaptive changes to root angle in response to external phosphate availability are RMD dependent, providing a potential target for breeders.

Metadata

Item Type:	Article
Authors/Creators:	Huang, G Liang, W Sturrock, CJ Pandey, BK Giri, J Mairhofer, S Wang, D Muller, L Tan, H York, LM Yang, J Song, Y Kim, Y-J Qiao, Y Xu, J Kepinski, S https://orcid.org/0000-0001-9819-5034 Bennett, MJ Zhang, D
Copyright, Publisher and Additional Information:	© The Author(s) 2018. 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 http://creativecommons.org/ licenses/by/4.0/.
Dates:	Accepted: 1 May 2018 Published: 11 June 2018
Institution:	The University of Leeds
Academic Units:	The University of Leeds > Faculty of Biological Sciences (Leeds) > School of Biology (Leeds)
Depositing User:	Symplectic Publications
Date Deposited:	09 May 2018 14:15
Last Modified:	25 Jun 2023 21:20
Status:	Published
Publisher:	Springer Nature
Identification Number:	10.1038/s41467-018-04710-x
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:130574

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Rice actin binding protein RMD controls crown root angle in response to external phosphate

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