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

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Title Rice actin binding protein RMD controls crown root angle in response to external phosphate
 
Creator Huang, Guoqiang
Liang, Wanqi
Sturrock, Craig J.
Pandey, Bipin K.
Giri, Jitender
Mairhofer, Stefan
Wang, Daoyang
Muller, Lukas
Tan, Hexin
York, Larry M.
Yang, Jing
Song, Yu
Kim, Yu-Jin
Qiao, Yang
Xu, Jian
Kepinski, Stefan
Bennett, Malcolm J.
Zhang, Dabing
 
Subject Rice
phosphate
Rice actin binding protein
RMD
crown root angle
 
Description Accepted date: 1 May 2018
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.
We thank Miss Mingjiao Chen and Mr Zhijing Luo for performing rice crosses and rice
cultivation. We thank the Instrumental Analysis Center of Shanghai Jiao Tong University
(SJTU) for their help in obtaining and analyzing TEM images. This work was supported
by the National Key Research and Development Program of China (2016YFD0100804);
National Natural Science Foundation of China (grant no. 31430009, 31230051,
31322040, and 31271698); the Innovative Research Team, Ministry of Education, and
111 Project (grant no. B14016); the Science and Technology Commission of Shanghai
Municipality (grant no. 13JC1408200); the National Transgenic Major Program (grant
no. 2016ZX08009003-003-007); The European Research Council (ERC) FUTUREROOTS
Advanced Investigator grant; Royal Society Wolfson, Newton Bhabha and
Advanced Fellowship awards; University of Nottingham Beacon of Excellence PhD
+fellowship; The Interuniversity Attraction Poles Programme (IUAP P7/29 “MARS”),
initiated by the Belgian Science Policy Office; National Key Laboratory of Crop Genetic
Improvement; The DBT-CREST fellowship (to J.G.) and the National Research Foundation
Singapore under its Competitive Research Programme (CRP Award No.
NRF2010NRF-CRP002-018).
 
Date 2018-06-18T12:05:27Z
2018-06-18T12:05:27Z
2018
 
Type Article
 
Identifier Nature Communications, 9(1): 2346
2041-1723
http://223.31.159.10:8080/jspui/handle/123456789/862
https://www.nature.com/articles/s41467-018-04710-x
https://doi.org/10.1038/s41467-018-04710-x
 
Language en_US
 
Format application/pdf
 
Publisher Springer Nature