Rice CYP703A3, a cytochrome P450 hydroxylase, is essential for development of anther cuticle and pollen exine Ultrastructure of Pollen Exine in Amentotaxus Pilger and Its Significance in Taxonomy Ultrastructure of Pollen Exine in Peucedaneae Drude with Reference to Its Systematic Significance Studies on pollen exine ultrastructure of the Polygonaceae Analysis on Composition of Pollen Exine and Pollen Morphology in Five Species of Gymnosperm Pollen Ultrstructure of Pentapylacaceae and Sladeniaceae and Their Relationships to the Family Theaceae The ATP-binding Cassette Transporter OsABCG15 is Required for Anther Development and Pollen Fertility in Rice A Comparative study on pollen exine ultrastructure of Nothofagus and the other genera of Fagaceae