I want to investigate the hyperaccumulator genera which can be used for rehabilitation of contaminated lands.
take a look to : Hyperaccumulators of metal and metalloid trace elements: facts and fiction.Vand der Ent 2013, it may help you
In brief, More than 530 hyper accumulators of heavy metals have been identified worldwide and the list is growing. Among those majority are Ni hyper accumulators (75%), only 5 species are Cd hyper accumulators and 12-14 species are Zn hyper accumulators. Approximately, 25% of discovered hyper accumulator plant belong to the family of Brassicaceae (genera Thlaspi and Alyssum).
After brassicaceae, most of the hyper accumulators belong to the families; Crassulaceae, Solanaceae, Fabaceae, Asteraceae, Rubiaceae, Scrophulariaceae and Chenopodiaceae, brake ferns of genus Pteris are known to hyperaccumulate As.
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