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Comparative proteomic analysis of aluminum tolerance in Tibetan wild and cultivated barleys

Zhang, T., Dai, H., Cao, F., Chen, X., Zhang, M., Ahmed, I.M., Chen, Z-H, Li, C., Zhang, G. and Wu, F. (2013) Comparative proteomic analysis of aluminum tolerance in Tibetan wild and cultivated barleys. PloS one, 8 (5). e63428.

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Aluminum (Al) toxicity is a major limiting factor for plant production in acid soils. Wild barley germplasm is rich in genetic diversity and may provide elite genes for crop Al tolerance improvement. The hydroponic-experiments were performed to compare proteomic and transcriptional characteristics of two contrasting Tibetan wild barley genotypes Al- resistant/tolerant XZ16 and Al-sensitive XZ61 as well as Al-resistant cv. Dayton. Results showed that XZ16 had less Al uptake and translocation than XZ61 and Dayton under Al stress. Thirty-five Al-tolerance/resistance-associated proteins were identified and categorized mainly in metabolism, energy, cell growth/division, protein biosynthesis, protein destination/storage, transporter, signal transduction, disease/defense, etc. Among them, 30 were mapped on barley genome, with 16 proteins being exclusively up-regulated by Al stress in XZ16, including 4 proteins (S-adenosylmethionine-synthase 3, ATP synthase beta subunit, triosephosphate isomerase, Bp2A) specifically expressed in XZ16 but not Dayton. The findings highlighted the significance of specific-proteins associated with Al tolerance, and verified Tibetan wild barley as a novel genetic resource for Al tolerance.

Item Type: Journal Article
Publisher: Public Library of Science
Copyright: © 2013 Dai et al.
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