Differential antioxidation activities in two alfalfa cultivars under chilling stress

被引：20
|
作者：
Wang, Wen-Bin [1 ]
Kim, Yun-Hee [2 ]
Lee, Haeng-Soon [2 ]
Deng, Xi-Ping [1 ]
Kwak, Sang-Soo [2 ]
机构：
[1] NW A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
[2] KRIBB, Enviromental Biotechnol Res Ctr, Taejon 305806, South Korea
来源：
PLANT BIOTECHNOLOGY REPORTS | 2009年 / 3卷 / 04期
关键词：
Alfalfa; Antioxidant enzymes; Chilling stress; Germination; Lipid peroxidation; INDUCED OXIDATIVE STRESS; DROUGHT; RESPONSES; ENZYME; RICE; SALT; TOLERANCE; CHLOROPLASTS; PEROXIDASES; METABOLISM;
D O I：
10.1007/s11816-009-0102-y
中图分类号：
Q81 [生物工程学（生物技术）]; Q93 [微生物学];
学科分类号：
071005 ; 0836 ; 090102 ; 100705 ;
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 10A degrees 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.
引用
收藏
页码：301 / 307
页数：7
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