Enhanced cadmium efflux and root‐to‐shoot translocation are conserved in the hyperaccumulator Sedum alfredii (Crassulaceae family). Issue 12 (11th June 2016)

• Record Type: Journal Article
• Authors: Zhang, Zhongchun; Yu, Qi; Du, Hanying; Ai, Wenli; Yao, Xuan; Mendoza‐Cózatl, David G.; Qiu, Baosheng
• Is Part Of: FEBS letters. Volume 590:Issue 12(2016)
• Page Start: 1757
• Page End: 1764
• Publication Date: 2016-06-11
• Subjects: cadmium efflux -- cadmium hyperaccumulation -- cadmium hypertolerance; Biochemistry -- Periodicals; Biophysics -- Periodicals; Molecular biology -- Periodicals; Biochimie -- Périodiques; Biochemistry; Biophysics; Molecular biology; Periodicals; 572.05
• DOI: 10.1002/1873-3468.12225
• Languages: English
• ISSNs: 0014-5793

Abstract

Abstract : Investigation on the molecular mechanisms of cadmium hyperaccumulation has been mostly focused on members of the Brassicaceae family. Here, we show using hyperaccumulating (HP) and nonhyperaccumulating (NHP) populations of Sedum alfredii (Crassulaceae), that Cd hypertolerance correlates with higher Cd efflux rates and less cadmium accumulation in suspension cells and roots. The heavy metal ATPase HMA2, but not HMA4, was highly expressed in suspension cultures and roots from HP plants compared to NHP cells and plants. Reciprocal grafting also showed that Cd translocation is more efficient in HP plants. These results suggest that cadmium efflux is a conserved mechanism among natural cadmium hyperaccumulator species. Abstract :