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Oxidative Response and Antioxidative Mechanism in Germinating Soybean Seeds Exposed to Cadmium

Author

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  • Shiyong Yang

    (Section of Ecology, School of Life Sciences, Anhui Normal University, Wuhu 241000, China)

  • Jianchun Xie

    (School of Environmental Science and Engineering, Anhui Normal University, Wuhu 241000, China)

  • Quanfa Li

    (Section of Ecology, School of Life Sciences, Anhui Normal University, Wuhu 241000, China)

Abstract

Seeds of soybean ( Glycine max L.) exposed to 50 mg/L (Cd50), 100 mg/L (Cd100) and 200 mg/L (Cd200) cadmium solution for 24, 48, 72 and 96 h were examined with reference to Cd accumulation, oxidative stress and antioxidative responses. Soybean seeds accumulated Cd in an exposure time-and dosage-dependent manner. FRAP (ferric reducing ability of plasma) concentration, GSH/hGSH content, and GST activity showed a pronounced exposure time-dependent response. Cd100 enhanced FRAP concentration in germinating soybean seeds as compared to Cd50 treatment after 24 h exposure. Cd200 however increased statistically GST activities after 72 and 96 h exposure. Under all Cd dosages, GSH/hGSH concentrations were depressed with increasing exposure time. Reduction of GSH/hGSH content and concomitant increase of GST activity suggested a possible participation of GSH into GSH-Cd conjugates synthesis. MDA content is a potential biomarker for monitoring Cd phytotoxicity because it responds significantly to treatment dosage, exposure time and dosage ´ exposure time interaction. Increase of proline content may be a response to acute heavy metal toxicity in soybean seeds.

Suggested Citation

  • Shiyong Yang & Jianchun Xie & Quanfa Li, 2012. "Oxidative Response and Antioxidative Mechanism in Germinating Soybean Seeds Exposed to Cadmium," IJERPH, MDPI, vol. 9(8), pages 1-12, August.
    • Handle: RePEc:gam:jijerp:v:9:y:2012:i:8:p:2827-2838:d:19318
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    References listed on IDEAS

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    1. M. Qadir & A. Ghafoor & G. Murtaza & G. MURTAZA, 2000. "Cadmium Concentration in Vegetables Grown on Urban Soils Irrigated with Untreated Municipal Sewage," Environment, Development and Sustainability: A Multidisciplinary Approach to the Theory and Practice of Sustainable Development, Springer, vol. 2(1), pages 13-21, March.
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