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. 2013 Jul 26:4:280.
doi: 10.3389/fpls.2013.00280. eCollection 2013.

Recent advances in the analysis of metal hyperaccumulation and hypertolerance in plants using proteomics

Giovanni Dalcorso  1 , Elisa Fasani, Antonella Furini
Affiliations

Recent advances in the analysis of metal hyperaccumulation and hypertolerance in plants using proteomics

Giovanni Dalcorso et al. Front Plant Sci. .

Abstract

Hyperaccumulator/hypertolerant plant species have evolved strategies allowing them to grow in metal-contaminated soils, where they accumulate high concentrations of heavy metals in their shoots without signs of toxicity. The mechanisms that allow enhanced metal uptake, root-to-shoot translocation and detoxification in these species are not fully understood. Complementary approaches such as transcriptomic-based DNA microarrays and proteomics have recently been used to gain insight into the molecular pathways evolved by metal hyperaccumulator/hypertolerant species. Proteomics has the advantage of focusing on the translated portion of the genome and it allows to analyze complex networks of proteins. This review discusses the recent analysis of metal hyperaccumulator/hypertolerant plant species using proteomics. Changes in photosynthetic proteins, sulfur, and glutathione metabolism, transport, biotic and xenobiotic defenses as well as the differential regulation of proteins involved in signaling and secondary metabolism are discussed in relation to metal hyperaccumulation. We also consider the potential contribution of several proteins to the hyperaccumulation phenotype.

Keywords: IEF; abiotic stress; heavy metals; hyperaccumulator/hypertolerance; proteomics.

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Figures

Figure 1
Figure 1
Schematic representation of the cellular mechanisms responsible for the heavy metal accumulation trait that have been identified through differential proteomics approaches. Processes that are involved in metal accumulation but whose actors have not been represented in proteomics results are highlighted by yellow circles. Green arrows mean general up-regulation, red arrows mean down-regulation. Red dots: heavy metal ions.
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