Studies on the Distribution of Erigeron canadensis L. Resistant to Paraquat in Mulberry Fields in Saitama Prefecture.

Hanioka, Yasuo

doi:10.3719/weed.36.298

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2004

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“…Paraquat‐resistant E. philadelphicus L. was found in mulberry fields (Watanabe et al . 1982) and E. canadensis L. was found in vineyards (Kato & Okuda 1983) and mulberry fields (Hanioka 1991) in Japan.…”

Section: Introductionmentioning

confidence: 99%

Differential levels of antioxidants in paraquat‐resistant and ‐susceptible Erigeron canadensis biotypes in Korea

Pyon

Piao

Roh

et al. 2004

Weed Biology and Management

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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 paraquatsusceptible 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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Section: Introductionmentioning

confidence: 99%