The Change Of Ultraweak Biolum Inescence At The Process Of Development And Maturation In Strawberry Fruit And Focus On The Excitation Mechanism Of Reactive Oxygen And Energy Level

This experiment took the strawberry as material to explore the relationship between the change of ultraweak biolum inescence and reactive oxygen system、energy level at the process of fruit ripening and maturation by studying the changes of ultraweak biolum inescence、reactive oxygen system、energy level and fruit quality. The main results were as follows:1. During the two process of maturation and postharvest in the strawberry fruit, fruit firmness, chlorophyll content and titratable acidity decreased, anthocyanins content, soluble solids, soluble sugar content and Vc content increased gradually, UWL intensity varied with the degree of development and the extension of storage time, it descripted that UWL may reflect the degree of fruit development and senescence; In addition, because of the chlorophyll was the most important photosynthetic pigments, with the development of the fruit matures, chlorophyll content decreased, UWL was declining, both had correlation, chloroplasts and photosynthesis may be used as one source of UWL.2. During the two process of maturation and postharvest in the strawberry fruit, ROS levels overall rised, the strength of active oxygen in the process of postharvest was greater than the process of development, UWL intensity overall decreased, it indicated that with the accumulation of reactive oxygen species,UWL intensity decreased, seen that during the process of development and senescence, the accumulation of reactive oxygen species was not the only source to cause the change of UWL, and did not reflect the trend of UWL.3. During the two process of maturation and postharvest in the strawberry fruit, the energy levels represented by ATP overall decreased, the varying intensity of energy level at room temperature was greater than the low temperature storage, UWL intensity overall decreased trend, it indicated that with the weakening of the energy levels, the UWL intensity decreased, seen that during the process of development and senescence, the energy levels represented by ATP can be used as one of the main sources of UWL.