Isolation and Expression Profiling of Gene Encoding Chalcone Synthase in Ceratopteris thalictroides Immunofluorescence Localization of Centrin and Tubulin during Spermatogenesis of Ceratopteris thalictroides Primary Study on Antheridiogen System of Dryopteris uniformis Ultrastructure of the Mature Egg and Fertilization in the Fern Ceratopteris thalictroides Effect of Culture Medium and Spore Dimension on Spore Germination and Sex Differentiation of Ceratopteris thalictroides (L.) Brongn. Effects of Pb2+ on Spore Germination and Gametophyte Development of Three Species of Fern Gametophyte Development of Pteris biaurita and Effects of Its Antheridiogen on the Gametophyte Development of Ceratopteris thalictroides Chlorophyll Fluorescence Analysis of Hermaphrodite and Male Gametophytes from Ceratopteris thalictroides(L.) Brongn. on Different Media Molecular clone and sequence analysis of hemoglobin gene in Ceratopteris thalictroides Studies on the development of gametophyte of Ceratopteris thalictroides Effects of Light Intensity on Spore Germination and Sex Differentiation of Ceratopteris thalictroides(L.) Brongn.