Cadmium tolerance and accumulation of Althaea rosea Cav. and its potential as a hyperaccumulator under chemical enhancement
- 230 Downloads
The role of ornamental plants has drawn much attention as the urban pollution levels exacerbate. Althaea rosea Cav. had showed its strong tolerance and accumulation ability of Cd in our previous work, thus, the effects of ethylenediamine triacetic acid (EDTA), ethylenegluatarotriacetic acid (EGTA) and sodium dodecyl sulfate (SDS) on its Cd phytoremediation capacity were further investigated in this work. It reconfirmed that the species had strong tolerance and accumulation ability of Cd. Particularly, the species can be regarded as a potential Cd-hyperaccumulator through applying chemical agents. However, different chelators and surfactants had great differences in affecting hyperaccumulating characteristics of the species. EGTA and SDS could not only increase the dry biomass of the plants, but also promote Cd accumulation in shoots and roots. On the contrary, EDTA was toxic to the species by restraining the growth of plants, although it could promote Cd accumulation in shoots and roots of the plants to a certain extent. Thus, EGTA and SDS were effective in enhancing phytoremediation with Althaea rosea Cav. for Cd contaminated soils, while EDTA is ineffective in this regard.
KeywordsOrnamental plant Althaea rosea Cav. Hyperaccumulator Chelator Surfactant Cadmium
Unable to display preview. Download preview PDF.
- Chen, Y. C., Dong, S. Y., & Xiong, Z. T. (2004a). Effect of surfactants and EDTA on cadmium bioaccumulation by Brassica juncea var. multiceps. Plant Nutrition and Fertilizer Science, 10, 651–656 (in Chinese).Google Scholar
- Jiang, X., Gao, X. S., Ying, P. F., & Ou, Z. Q. (2003). Solubilization and behavior of surfactants in soil. Chinese Journal of Applied Ecology, 14, 2072–2076.Google Scholar
- Liu, J. N., Zhou, Q. X., & Sun, T. (2006a). Growing responses and hyperaccumulating characteristics of three ornamental plants to Cd–Pb combined pollution. Acta Scientiae Circumstantiae, 26, 2039–2044.Google Scholar
- Liu, J. N., Zhou, Q. X., Wang, X. F., Zhang, Q. R., & Sun, T. (2006b). Potential of ornamental plant resources applied to contaminated soil remediation. In J. A. Teixeira da Silva (Ed.) Floriculture, Ornamental and Plant Biotechnology: Advances and Topical Issues (pp. 245–252). UK: Global Science Books.Google Scholar
- Ma, Y. L. (2003). The role of domestic floriculture in prevention and treatment of pollution. Journal of Changchun University, 13, 21–29.Google Scholar
- Schmidt, U. (2003). Enhancing phytoextraction: the effect of chemical soil manipulation on mobility, plant accumulation, and leaching of heavy metals. Journal of Environmental Quality, 32, 1939–1954.Google Scholar
- Wang, X., & Zhou, Q. X. (2003). Distribution of forms for cadmium, lead, copper and zinc in soil and its influences by modifier. Journal of Agro-Environment Science, 22, 541–545.Google Scholar
- Xia, J. Q. (1996). Detail explanation on the state soil-environment quality standard of China. (Beijing: Chinese Environmental Science Press).Google Scholar
- Zhou, Q. X., & Song, Y. F. (2004). Principles and Methods of Contaminated Soil Remediation. (Beijing: Science Press).Google Scholar