十字花科植物花旗竿花药发育的细胞形态学观察

摘要

采用常规石蜡切片技术,观察研究十字花科植物花旗竿的花药发育过程。研究结果表明：花旗竿每朵花6枚雄蕊,每个花药4个花粉囊;小孢子在四分体中的排列为四面体型;成熟花粉粒近球形,属3-细胞型花粉粒并有3个萌发沟;花粉囊壁由4层细胞构成,即表皮（1层）、药室内壁（1层）、中层（1层～数层）和绒毡层（1层）;绒毡层发育属分泌型。%Anther development of Ranunculus japonicus Thunb was studied by the methods of conventional plant paraffin section technology.The results showed that each flower had six stamens,anthers were tetrasporangiate,and microspore mother cells meiosis was conformed to simultaneous type with tetrahedral.Mature pollen grain was near spherical,belonged to the 3-celled type and had three germination apertures.The pollen sac wall was composed of four 1ayers,epidermis（1 layer）,endothelium（1 layer）,middle layer（1 layer - several layers）,tapetum（1 layer）,and the tapetum belonged to secretory type.