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Effects of Salt Stress on the Activity of Protective Enzymes in Cotton Seedling

Li Fuguang;Li FengLian;Li Xiulan(Cotton Research Institute, CAAS, Anyang,455112)  
The changes of the protective enzyme activity in roots and cotyledons were compared between two different salt tolerance cotton cultivars (Salt-tolerant cultivar zhimiah 3 and non-tolerant cultivar Lumian 1024). The results showed that both POD and SOD activities in roots of two cultivars raised under salt stress, and declined in cotyledons of two cultivars;At primary stage of salt stress, the higher POD. SOD activity could be maintained in roots of Zhimian 3 than Lumain 1024. However, at the late stage of salt stress, the POD. SOD activity significantly declined in Zhimian 3 and gradually rose in Lumian 1024; The POD. SOD activity was almost the same between cotyledon of Zhimian 3 under salt stress and control, and the POD. SOD activity gradually declined in cotyledon of Lumian 1024. As a result it was mainly influenced by roots that cotton seedling adapted to salt stress, but salt tolenance of cotton variety was influenced by cotyledons.
【Fund】: 中国农业科学院院长基金
【CateGory Index】: S562
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