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Polyploids Exhibit Higher Potassium Uptake and Salinity Tolerance in Arabidopsis

Science  25 Jul 2013:

DOI: 10.1126/science.1240561

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Abstract

Genome duplication (or polyploidization) has occurred throughout plant evolutionary history and is thought to have driven the adaptive radiation of plants. We found that the cytotype of the root, and not the genotype, determined the majority of heritable natural variation in the concentration of leaf potassium (K) in Arabidopsis thaliana. Autopolyploidy also provided resistance to salinity and may represent an adaptive outcome of the enhanced K accumulation of plants with higher ploidy.

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