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http://dx.doi.org/10.5010/JPB.2009.36.3.219

Selection of oxidative stress-tolerant sweetpotato cultivars for cultivation on marginal lands  

Kim, Yun-Hee (Environmental Biotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB))
Park, Sung-Chul (Environmental Biotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB))
Yang, Kyoung-Sil (Environmental Biotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB))
Zhou, Zhilin (Sweetpotato Research Institute, Chinese Academy of Agricultural Sciences (CAAS))
Zhao, Donglan (Sweetpotato Research Institute, Chinese Academy of Agricultural Sciences (CAAS))
Ma, Daifu (Sweetpotato Research Institute, Chinese Academy of Agricultural Sciences (CAAS))
Jeong, Jae-Cheol (Environmental Biotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB))
Lee, Haeng-Soon (Environmental Biotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB))
Kwak, Sang-Soo (Environmental Biotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB))
Publication Information
Journal of Plant Biotechnology / v.36, no.3, 2009 , pp. 219-223 More about this Journal
Abstract
Oxidative stress derived from excess reactive oxygen species (ROS) is a major damaging factor for plants exposed to environmental stresses. Sweetpotato [Ipomoea batatas (L.) Lam] has a relatively broad adaptability to harsh environmental conditions compared to other staple crops. In this study, to select stress-tolerant sweetpotato cultivars for sources of molecular breeding on marginal lands, we evaluated the ion leakage values in 10 different cultivars after treatment of methyl viologen (MV), an ROS-generating nonselective herbicide, to leaf discs. DPPH radical scavenging activity and the contents of total phenolics were also investigated. The ion leakage of each cultivar showed a diverse value, which is well correlated with DPPH radical scavenging activity of each cultivar. DPPH radical scavenging activity also showed a high corelation with the contents of total phenolic contents. Three cultivars of Yanshu 8, Shinhwangmi and Shinzami showed high antioxidant activity. Our results suggest that a simple and efficient DPPH radical scavenging activity would be a suitable method to select potential cultivars with enhanced tolerance to multiple environmental stress.
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