Study on physiological characters of cold resistance of Cycas revoluta Research on technology of sowing and cultivating seedling of cycad(Cycus revoluta) Plantlets with Multi-shoots of Cycas revoluta Thunb in Vitro An Effective Protocol for the Isolation of RNA from Cycad Leaves Plantlets with Multi-shoots of Cycas revoluta Thunb in Vitro Homeodomain leucine-zipper proteins and their role in synchronizing growth and development with the environment Embryo and Endosperm Structures of Cycas revoluta Thunb.Seeds Three New Species of Porella from Mountain Hengduan, China Seed Coat Structure Traits of Cycas revoluta Thunb.