Abstract:In order to understand the relationship between contents of terpene lactones and photosynthetic characters in Ginkgo biloba leaves, the contents of terpene lactones were determined and chlorophyll fluorescence features was studied. The results showed that the changes in terpene lactone contents were significant at different harvest time. In general, bilobalide and ginkgolide contents were low in May, then increased gradually, reached peak in August, and afterwards decreased until the end of October. At the same time, the photosynthetic pigment content and chlorophyll fluorescence parameters in leaves showed periodical changes. The contents of bilobalide and lactone had significant positive correlation with chlorophyll fluorescence index of Y(NPQ). So, it was suggested that bilobalide and lactone contents could be forecasted by chlorophyll fluorescence parameters.
