Oxidative Response and Antioxidative Mechanism in Germinating Soybean Seeds Exposed to Cadmium
AbstractSeeds 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. View Full-Text
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Yang, S.; Xie, J.; Li, Q. Oxidative Response and Antioxidative Mechanism in Germinating Soybean Seeds Exposed to Cadmium. Int. J. Environ. Res. Public Health 2012, 9, 2827-2838.
Yang S, Xie J, Li Q. Oxidative Response and Antioxidative Mechanism in Germinating Soybean Seeds Exposed to Cadmium. International Journal of Environmental Research and Public Health. 2012; 9(8):2827-2838.Chicago/Turabian Style
Yang, Shiyong; Xie, Jianchun; Li, Quanfa. 2012. "Oxidative Response and Antioxidative Mechanism in Germinating Soybean Seeds Exposed to Cadmium." Int. J. Environ. Res. Public Health 9, no. 8: 2827-2838.