Four species of Sedum L. were grown in nutrient solution for the comparis on of their Zn uptake and accumulation. S. alfredii Hance showed much greater tolerance to Zn than the other three species. Shoot and root yields of S. sarmentosum Bunge,S. bulbiferum Makino, and S.emarginatum Migo decreased with increasing Zn concentration in the solution, while shoot and root yields of S. alfredii increased when Zn concentration was ≤80 mg/L. At 80 mg/L Zn, Zn concentration in shoots of S. alfredii reached 19.09 mg/g.S. alfredii was also more efficient in Zn translocation from roots to shoots, while Zn concentration in shoots was much higher than in roots. However, this was not the case for the other three species. The results showed that S. alfredii is a Zn hyperaccumulator and could be useful for the phytoremediation of Zn contaminated soils.
四种景天属植物对锌吸收和累积差异的研究
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