Differential antioxidation activities in two alfalfa cultivars under chilling stress

被引：1
|
作者：
Wen-Bin Wang
Yun-Hee Kim
Haeng-Soon Lee
Xi-Ping Deng
Sang-Soo Kwak
机构：
[1] Northwest A&F University,State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau
[2] Korea Research Institute of Bioscience and Biotechnology (KRIBB),Enviromental Biotechnology Research Center
来源：
Plant Biotechnology Reports | 2009年 / 3卷
关键词：
Alfalfa; Antioxidant enzymes; Chilling stress; Germination; Lipid peroxidation;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
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°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.
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页码：301 / 307
页数：6
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