Study of Uranium Accumulation Mechanism and Physiological Responses of Eichhornia crassipes and Pistia stratiotes

Abstract:

A hoagland solution hydroponic experiment was carried out to study the short-duration (8 d) accumulation ability of uranium by Eichhornia crassipes and Pistia stratiotes under different uranium concentration. Effects on antioxidant enzymes (SOD, CAT, POD) activity, malondialdehyde (MDA) and free proline content of E. crassipes and P. stratiotes under uranium stress were discussed. The results show the activity of antioxidant enzymes is increased under 0.1~1 mg·L^-1 uranium stress, MDA content is at lower level indicated that antioxidant enzymes play an important role in alleviating lipid peroxidation induced by uranium stress. Under 5mg·L^-1 uranium stress, the antioxidant enzymes activity of E. crassipes is at higher level and MDA content is lower,nevertheless, the P. stratiotes is just the opposite, indicating that E. crassipes tolerated higher concentrations than P. stratiotes. The activity of antioxidant enzymes is inhibited under higher concentration (20 mg·L^-1 and 50 mg·L^-1) uranium stress. As an important osmoregulation material, free proline content of both plants is more than the contrast.

• Periodical: Advanced Materials Research (Volumes 1073-1076)
• Pages: 142-146
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1073-1076.142
• Online since: December 2014
• Authors: Shi You Li, Qing Peng Wei, Shui Bo Xie*, Ying Jiu Liu, Zheng Yan
• Keywords: Antioxidant Enzymes, Eichhornia crassipes, Pistia stratiotes, Uranium

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