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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 448-453Physiological Response of Pleioblastus fortunei to...

Physiological Response of Pleioblastus fortunei to Mercury Stress and Alleviatory Effects of Exogenous Silicon

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Abstract:

A pot experiment was conducted to explore the physiological toxicity of mercury (Hg) and alleviatory effects of exogenous silicon (Si) on Pleioblastus fortunei by the determination of leaf membrane permeability, chlorophyll and soluble protein content, SOD and POD activity, root vigor, net photosynthetic rate. The results indicated that 20 mg/kg Hg²⁺ treatment for 100 days caused no obvious physiological effect on Pleioblastus fortunei except for root vigor. As the concentration of Hg²⁺ increased from 20 mg/kg to 500 mg/kg, the degree of physiological injury increased, and 500 mg/kg Hg²⁺ exhibited significant physiological toxicity to Pleioblastus fortunei. Application of 300 mg/kg Si had no apparent regulatory effect on physiological response of Sasa fortunei in the presence of 20 mg/kg Hg²⁺, but significantly alleviated the toxicity of 500 mg/kg Hg²⁺. Si could prohibite the descent of SOD activity and the increase of POD activity caused by high concentration of Hg²⁺, thus maintain the metabolism balance of active oxygen. Pleioblastus fortunei can be considered as phytoremediation plant and Si to improve resistance of bamboos cultivated in Hg polluted area.

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Periodical:

Applied Mechanics and Materials (Volumes 448-453)

Pages:

74-80

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.448-453.74

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Online since:

October 2013

Authors:

Yin Feng Xie*, Yu Gao, Yu Xiang Tang, Shan Shan Zhang

Keywords:

Mercury Toxicity, Physiological Response, Pleioblastus fortunei, Silicon

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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