In this paper,the effects of different hormones,qualities and mediums during induction and proliferation of callus Ginkgo biloba L. in vitro were studied.The combinations of different kinds of hormones could more effectively induce the formation of callus than single factor.The effects of MS medium with NAA and 6 BA were the best.White light and green light were optimal for the induction of callus from explants.MS and 1/2 MS were optima...