Effects of UV-B Radiation on Seedling Growth and Chloroplast Ultrastructure Changes in Some Woody Plants Effects of acetochlor on the photosynthetic and fluorescence characteristics and chloroplast structure of grape leaves. The Effect of Light and Hormones on Leaf Senescence Changes of Chloroplast Ultramicrostructure and Function of Different Green Organs in Wheat under Limited Irrigation Effects of excessive calcium fertilization on photosynthetic characteristics and chloroplast ultra-structure of tea tree