Studies on Diurnal Variations of Photosynthetic Characteristics and Chlorophyll Fluorescence Parameters of Different Clones of Ulmus pumila cv.'Zhonghua jinye'
In order to study the differences in character and photosynthetic among the different clones,and then develop excellent clone,the 3 years grafted seedlings of different clones selected and developed from the generation of Golden Ulmus pumila were used as materials and female parent Ulmus pumila cv.‘Zhonghua jinye'as control.The morphologyical characteristics and the diurnal variations of photosynthetic and fluorescence paramaters were studied.The results showed that there were significant differences on mor...