Chrysanthemum was one of the four cut flowers in world, was also very important in China for cutting flower recent years. Winter chrysanthemum was one special population and more cold tolerance. The relative electric conductivity (REC), content of MDA, soluble sugar and protein, SOD,POD activity and pollen viability under natural and artificial low temperature were investigated in four winter cut chrysanthemum cultivars'Hanzi', 'Hanhuang'. The logistic equation was constructed based on the relationship between REC and temperature below 0℃, then the semi-lethal temper- ature(LT50) was determined, and then compared the cold tolerance of different cultivars, different florets and different flowering by variance analysis. The main results were as follows:(1) From 15th Dec to 27th,2008, ... (共54页)
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