Morphological and Anatomical Study on Female Sterility in Camptotheca acuminata Decne. Anatomy of Papilla Cells of a Female Sterile Mutant FS-M1 in Brassica napus Participation of Phytochrome in Sterility Alteration of Photoperiod-sensitive Female Sterile Ramie Phenotypic Characterization of a Female Sterile Mutant in Rice Analyses of peroxidase isozyme and protein polypeptides in female sterile Pinus tabulaeformis