Studies on Senescence Physiology of Osmanthus fragrans Cut-flowers during Vase Life

The changes of protective enzyme activity,the cytoplasm membrane permeability,the malondialdehyde(MDA),and soluble proteins in the senescence process of three Osmanthus fragrans cultivars cut flowers were determined in a vase life.The results were showed that the contents of soluble proteins of three Osmanthus fragrans cultivars were decreased,while the cytoplasm membrane permeability and MDA contents were increased with the flowers growth.The activities of superoxide dismutase(SOD) were increased initially and then decreased,with an apparent peak value.But the activities of peroxidase(POD) were increased during the whole flower process.Comprehensively,the vase-life of cultivar 'Duoyajin'gui was longer than cultivar 'Sijigui'but shorter than cultivar 'Wanziyin'gui.It was also found that the keep fresh agents had an effect on prolonging cut flowers life to some extent.