Differential levels of antioxidants in paraquat-resistant and -susceptible Erigeron canadensis biotypes in Korea
Corresponding Author
JONG YEONG PYON
Department of Agronomy, Chungnam National University, Taejon, Korea,
*Jong Yeong Pyon, Department of Agronomy, Chungnam National University, Taejon 305-764, Korea. Email: [email protected]Search for more papers by this authorREN ZHE PIAO
College of Agriculture, Yanbian University, Jilin Province, China and
Search for more papers by this authorSOG WON ROH
Department of Agronomy, Chungnam National University, Taejon, Korea,
Search for more papers by this authorSEUNG YONG SHIN
Laboratory of Environmental Biotechnology, Korea Research Institute of Bioscience and Biotechnology, Yusong, Taejon, Korea
Search for more papers by this authorSANG SOO KWAK
Laboratory of Environmental Biotechnology, Korea Research Institute of Bioscience and Biotechnology, Yusong, Taejon, Korea
Search for more papers by this authorCorresponding Author
JONG YEONG PYON
Department of Agronomy, Chungnam National University, Taejon, Korea,
*Jong Yeong Pyon, Department of Agronomy, Chungnam National University, Taejon 305-764, Korea. Email: [email protected]Search for more papers by this authorREN ZHE PIAO
College of Agriculture, Yanbian University, Jilin Province, China and
Search for more papers by this authorSOG WON ROH
Department of Agronomy, Chungnam National University, Taejon, Korea,
Search for more papers by this authorSEUNG YONG SHIN
Laboratory of Environmental Biotechnology, Korea Research Institute of Bioscience and Biotechnology, Yusong, Taejon, Korea
Search for more papers by this authorSANG SOO KWAK
Laboratory of Environmental Biotechnology, Korea Research Institute of Bioscience and Biotechnology, Yusong, Taejon, Korea
Search for more papers by this authorAbstract
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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