Abstract: Pollen viability and life-span of Eleutherococcus senticosus was evaluated by TTC (2, 3, 5-triphenyl tetrazolium chloride)test, its stigma receptivity was estimated by benzidine-H 2O 2 method and bagging, and the stigma submicroscopic morphology was examined with scanning electron microscopy (SEM). The results as follows:In same habtat, the pollen viability of long-filament (male)E. senticosus was higher than that of middle-filament (bisexual)E. senticosus, the life span of both of them was about 4 days. Moreover, the pollen viability and its decline rate were different according to different plants and different habitats. The stigma of long-filament E. senticosus hadn't receptivity forever, the short-filament (female)and middle-filament (bisexual)E. senticosus had stigma receptivity at 5~7, 6~8, or 7~9 days after blooming according to different habitats, and the more the canopy closure was, the later the stigma receptivity began. When the stigmas began to receive pollens, they were wet, dehiscent and 5 or 4-lobed, and the stigma papillae were kitten's ear-like shape.

Key words: Eleutherococcus senticosus, pollen, pollen viability, stigma, stigma receptivity, scanning electron microscopy