Differences and similarities in selenium biopathways in Astragalus, Neptunia (Fabaceae) and Stanleya (Brassicaceae) hyperaccumulators.

This study shows that Astragalus, Stanleya and Neptunia have evolved different selenium handling physiologies, resulting in different mechanisms for translocation and storage of excess selenium. Important dissimilarities among the three analyzed species suggests that Se hyperaccumulation has likely evolved multiple times under similar environmental pressures.