Rice–arsenate interactions in hydroponics: a three-gene model for tolerance

Norton, Gareth J. and Nigar, Meher and Williams, Paul and Dasgupta, Tapash and Meharg, Andrew A. and Price, Adam H. (2008) Rice–arsenate interactions in hydroponics: a three-gene model for tolerance. Journal of Experimental Botany, 59 (8). pp. 2277-2284. ISSN 0022-0957

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In this study, the genetic mapping of the tolerance of root growth to 13.3 μM arsenate [As(V)] using the Bala×Azucena population is improved, and candidate genes for further study are identified. A remarkable three-gene model of tolerance is advanced, which appears to involve epistatic interaction between three major genes, two on chromosome 6 and one on chromosome 10. Any combination of two of these genes inherited from the tolerant parent leads to the plant having tolerance. Lists of potential positional candidate genes are presented. These are then refined using whole genome transcriptomics data and bioinformatics. Physiological evidence is also provided that genes related to phosphate transport are unlikely to be behind the genetic loci conferring tolerance. These results offer testable hypotheses for genes related to As(V) tolerance that might offer strategies for mitigating arsenic (As) accumulation in consumed rice.

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Journal Article
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Journal of Experimental Botany
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27 Apr 2012 11:46
Last Modified:
19 Sep 2023 00:49