Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Alternanthera philoxeroides might be used for bioremediating heavy metal contaminated soil.

Abstract

Alternanthera philoxeroides, usually called as Shui-hua-sheng in China and commonly known as Alligator weed in English, is an immersed aquatic plant and is listed an invasive species in China. In this work, we found that Shui-hua-sheng (A. philoxeroides) is able to accumulate six heavy metals with the ability of Zn2+ > Mn2+ > Pb2+ > Cu2+ >Cd2+ >Cr3+. Under the conditions of the stimulated external high concentration (1 mmol/L) of Cu2+, Mn2+, Zn2+ and Cr3+, the biomass of Shui-hua-sheng (A. philoxeroides) reduced, total length of root and total area of root surface decreased as well, accordingly R/S ratios increased. Moreover, the nutritional characteristics of K+, Ca2+ and Mg2+ were altered significantly, respectively, under the exposure to contaminations of Pb2+, Cd2+, Cu2+ and Zn2+. The findings in this research implied that the Shui-hua-sheng (A. philoxeroides) be able to tolerate mentioned heavy-metals with high level contamination, and also might be as alternative to be used for biomediation of heavy-metal polluted soil or water.