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Dong M.,Hunan City University | Dong M.,Hunan Agricultural University | Zhao Y.,Hunan City University | Lei C.,Hunan City University | And 3 more authors.
Huanjing Kexue Xuebao/Acta Scientiae Circumstantiae | Year: 2012

Artemisia selengensis grown in Dongting Lake wetland was recently found as a plant with good capacity in enriching Cd. A pot experiment was conducted to study the biological traits and the Cd accumulation characteristics of Artemisia selengensis to Cd stress during its growth period. The final results showed that the leaves were injured apparently in response to significant decrease of above-ground biomass when Cd concentrations in soil were higher than 40 mg·kg -1. Artemisia selengensis could complete its life cycle at a high Cd concentration (100 mg·kg -1) and showed strong resistence to soil Cd. The bioavailable Cd accounted for 15.3%~37.1% of total soil Cd. There were no significant differences of Cd concentrations in the plants during their different growth phases, but a lower Cd accumulation was observed in stems and leaves at the seedling stage than the other stages because of low biomass. During the adult stage of Artemisia selengensis, Cd accumulation was up to 492~588 mg·kg -1 under the Cd treatment of 40~60 mg·kg -1. These data suggested that Artemisia selengensis was an outstanding species that could be selected as a potential candidate to repair Cd pollution from lake soil. Source

Dong M.,Hunan Agricultural University | Dong M.,Hunan City University | Zhao Y.-L.,Hunan City University | Ku W.-Z.,Hunan City University | And 3 more authors.
Chinese Journal of Ecology | Year: 2011

Aiming at the present serious situation of soil Cd pollution in Dongting Lake wetland, this paper analyzed the Cd enrichment characteristics and remediation effects of eight dominant plant species growing in Dongting Lake area. Among the eight dominant plants, Artemisia selengensis presented a notable capacity to absorb Cd from lake soil, and had good effect in the remediation of Cd pollution, being an ideal plant for the bioremediation of Cd-polluted soil in Dongting Lake wetland. A. verlotorum had acceptable effect in the remediation of Cd pollution, being able to be selected as a potential candidate for the bioremediation of wetland soil Cd pollution. Phragmites australis and Miscanthus lutarioriparius had higher Cd accumulation in their roots, being available for the Cd enrichment, and their higher aboveground biomass, which could be harvested every year, could also play a positive role in controlling the Cd pollution in Dongting Lake wetland. Source

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