Differential levels of antioxidants in paraquat-resistant and -susceptible Erigeron canadensis biotypes in Korea |
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| Authors: | JONG YEONG PYON REN ZHE PIAO SOG WON ROH SEUNG YONG SHIN SANG SOO KWAK |
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| Institution: | Department of Agronomy, Chungnam National University, Taejon, Korea,; College of Agriculture, Yanbian University, Jilin Province, China and; Laboratory of Environmental Biotechnology, Korea Research Institute of Bioscience and Biotechnology, Yusong, Taejon, Korea |
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| Abstract: | To characterize the biochemical differences in paraquat-resistant and -susceptible biotypes of Erigeron canadensis L. collected from Korea, we investigated the constitutive levels of various antioxidants such as antioxidant enzymes and low molecular weight antioxidants in leaves, as well as after paraquat treatment. The activities of superoxide dismutase, peroxidase, ascorbate peroxidase, and catalase were higher in the paraquat-resistant biotype than in the paraquat-susceptible biotype. Reduced ascorbic acid content was higher in the resistant biotype, but the content of reduced glutathione was higher in the susceptible biotype. These results indicate that one of the paraquat-resistant mechanisms in E. canadensis in the present study might be related to protecting the activities of antioxidant enzymes, such as superoxide dismutase, peroxidase ascorbate peroxidase, and catalase, as well as the contents of low molecular weight antioxidants such as ascorbate and glutathione. |
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| Keywords: | antioxidant enzymes ascorbate peroxidase Erigeron canadensis glutathione reductase glutathione paraquat superoxide dismutase |
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