关键词: 大葱, 大葱, 子叶, 再生体系, 再生植株

Abstract:

The experiment was purposely to research the changes of antioxidant enzymes and MDA in the bulbs of 7 lily cultivars stored at low temperature and the relationship between antioxidant enzymes and the dormancy release. The results indicated that during the period of 127 days of cold storage (2-5℃), SOD,POD and CAT activity increased to the minimum and then increased, at the end of the cold storage, POD and CAT activity still increased, while SOD activity decreased. During the period of 151 days of frozen storage (-1℃), SOD, POD and CAT activity decreased firstly little, then increased highly, and decreased little at the end. In terms of MDA contents, it increased and reached to a high level at the medium of cold storage, then decreased little. But during the frozen storage times, it changed little，and MDA content in big bulbs was more than that in small bulbs. The decreasing of POD activity resulted from bulbs cold storage played an important role on the dormancy release ,and the no-ordinary metabolism of active oxygen content resulted from long times of storage at low temperature was one reason for the stress conditions injury.