부산대학교 도서관

In order to overcome the impact of extreme climate, understanding weather and environmental change as well as monitoring crop growth and giving appropriate crop management to increase crop yields become important. Environmental stresses such as excess sunlight, low temperature, low soil fertility, and water deficit would affect the plant growth. When the plant suffers from water stress, the efficiency of photosynthesis decreases, thus making the excess solar energy turning into heat and fluorescence. Chlorophyll fluorescence detection has been used as a nondestructive technique for prediction of photosynthetic efficiency and early detection of water stress. This research has constructed an automatic chlorophyll fluorescence detection system for bovine tomato, containing a blue LED light as excitation light source and a high sensitive CCD camera to capture fluorescence image. The system has proven to be a feasible way to estimate the water stress of a tomato leave by calculating the fluorescence decrease ratio R_(fd).