Differential antioxidation activities in two alfalfa cultivars under chilling stress

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Title
Differential antioxidation activities in two alfalfa cultivars under chilling stress
Author(s)
W B Wang; Yun Hee Kim; Haeng Soon Lee; X P Deng; Sang Soo Kwak
Bibliographic Citation
Plant Biotechnology Reports, vol. 3, no. 4, pp. 301-307
Publication Year
2009
Abstract
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.
Keyword
AlfalfaAntioxidant enzymesChilling stressGerminationLipid peroxidation
ISSN
1863-5466
Publisher
Springer
DOI
http://dx.doi.org/10.1007/s11816-009-0102-y
Type
Article
Appears in Collections:
Division of Biomaterials Research > Plant Systems Engineering Research > 1. Journal Articles
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