Engineering expression of polyphosphate confers cadmium resistance in tobacco

抄録

The feasibility of transgenic tobacco, genetically engineered to express bacterial polyphosphate (polyP) for phytoremediation of cadmium pollution was examined. The transgenic tobacco showed more resistance to Cd²⁺ and accumulated more Cd²⁺ than its wild-type progenitors. These results suggest that polyP has abilities to reduce Cd²⁺ toxicity, probably via a chelation mechanism, and to accumulate cadmium in the transgenic tobacco. Based on the results obtained in this study, polyP-mediated Cd²⁺ accumulation may serve as a useful strategy for Cd²⁺ phytoremediation.