Study on the relation of some changes of lily physiology and senescence in different growth periods

This paper,using elite ( lilium ) as material,studies the relation of some changes of lily physiology,development and senescence in different growth periods.The soluble protein content,with the development and senescence of lily flowers,was obviously decreased,while the plasma membrance permeability increased.Also,a marked increase in malondialchyde (MDA),used as a criterion of the level of membrane lipid proxidation,was observed.Meanwhile,the activity of POD (peroxidase) was increased in the process of senescence of lily flowers and its activity was higher in the later stage of senescence,while the activity of SOD (superoxide dismutase) was decreased in the process of senescence of lily flowers and its activity was higher in the early stage of senescence.