DOI QR코드

DOI QR Code

Differential antioxidation activities in two alfalfa cultivars under chilling stress

  • Wang, Wen-Bin (State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau, Northwest A&F University) ;
  • Kim, Yun-Hee (Enviromental Biotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB)) ;
  • Lee, Haeng-Soon (Enviromental Biotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB)) ;
  • Deng, Xi-Ping (State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau, Northwest A&F University) ;
  • Kwak, Sang-Soo (Enviromental Biotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB))
  • 투고 : 2009.03.30
  • 심사 : 2009.06.25
  • 발행 : 2009.10.31

초록

To understand the adaptability of alfalfa (Medicago sativa L.) to chilling stress, we analyzed the antioxidative mechanism during seed germination. The germination rates of six alfalfa cultivars were studied comparatively at $10^{\circ}C$. Xinmu No. 1 and Northstar were selected as chilling stress-tolerant and stress-sensitive cultivars for further characterization. After chilling treatment, Xinmu No. 1 showed higher seedling growth than Northstar. Xinmu No. 1 exhibited low levels of hydrogen peroxide and lipid peroxidation compared with Northstar. In addition, shoots in Xinmu No. 1 treated with chilling showed higher activities of the superoxide dismutase, ascorbate peroxidase (APX), and catalase than those of Northstar, whereas Xinmu No. 1 showed higher APX activity in roots that Northstar. These results indicated that high antioxidation activity in Xinmu No. 1 under chilling stress is well associated with tolerance to chilling condition during germination.

키워드

과제정보

연구 과제 주관 기관 : The Korea Foundation for International Cooperation of Science and Technology (KICOS), MEST, KRIBB

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