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Type: Journal article
Title: Enhancing phosphorus and zinc acquisition efficiency in rice: a critical review of root traits and their potential utility in rice breeding
Author: Rose, T.
Impa, S.
Rose, M.
Pariasca-Tanaka, J.
Mori, A.
Heuer, S.
Johnson-Beebout, S.
Wissuwa, M.
Citation: Annals of Botany, 2013; 112(2):331-345
Publisher: Oxford Univ Press
Issue Date: 2013
ISSN: 0305-7364
Statement of
T. J. Rose, S. M. Impa, M. T. Rose, J. Pariasca-Tanaka, A. Mori, S. Heuer, S. E. Johnson-Beebout and M. Wissuwa
Abstract: Background: Rice is the world's most important cereal crop and phosphorus (P) and zinc (Zn) deficiency are major constraints to its production. Where fertilizer is applied to overcome these nutritional constraints it comes at substantial cost to farmers and the efficiency of fertilizer use is low. Breeding crops that are efficient at acquiring P and Zn from native soil reserves or fertilizer sources has been advocated as a cost-effective solution, but would benefit from knowledge of genes and mechanisms that confer enhanced uptake of these nutrients by roots. Scope: This review discusses root traits that have been linked to P and Zn uptake in rice, including traits that increase mobilization of P/Zn from soils, increase the volume of soil explored by roots or root surface area to recapture solubilized nutrients, enhance the rate of P/Zn uptake across the root membrane, and whole-plant traits that affect root growth and nutrient capture. In particular, this review focuses on the potential for these traits to be exploited through breeding programmes to produce nutrient-efficient crop cultivars. Conclusions: Few root traits have so far been used successfully in plant breeding for enhanced P and Zn uptake in rice or any other crop. Insufficient genotypic variation for traits or the failure to enhance nutrient uptake under realistic field conditions are likely reasons for the limited success. More emphasis is needed on field studies in mapping populations or association panels to identify those traits and underlying genes that are able to enhance nutrient acquisition beyond the level already present in most cultivars.
Keywords: Adventitious roots
deoxymugineic acid
marker-assisted selection
nutrient-use efficiency
phosphorus transporters
phosphorus uptake
zinc uptake
low-molecular-weight organic acids
radial oxygen loss
radical oxygen stress
root hairs
quantitative trait loci
Rights: © The Author 2012. Published by Oxford University Press on behalf of the Annals of Botany Company. This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
DOI: 10.1093/aob/mcs217
Appears in Collections:Agriculture, Food and Wine publications
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