Environmental physiological characteristics of some mosses in Shanghai:A preliminary study Comparative Study on Germination of Bretschneidara sinensis Seeds Treated with Solution Extracted from Forest Litter and Other Methods Expression of Bovine Growth Hormone Gene in Transgenic Potato Dynamic analysis on endo phylohormone during bolting time of roots in Saponikovia cata Callus induction and determination of total alkaloid content from Fritillaria ebeiensis var. purpurea APPLICATION OF EXOGENOUS PLANT GROWTH REGULATOR IN PLANT SOMATIC EMBRYOGENESIS