单叶血藤的胚胎学研究——小孢子发生及雄配子体发育  

A study on the Embryology in Sargentodoxa simplicifolia:the Formation of Microspores and Development of Male Gametes

作　　者：刘文哲[1] 盛仙永[1] 

机构地区：[1]西北大学生命科学学院,陕西西安710069

出　　处：《西北大学学报（自然科学版）》2003年第3期349-352,共4页Journal of Northwest University（Natural Science Edition）

基　　金：陕西省自然科学基金资助项目(2000SM14)

摘　　要：首次报道了大血藤科植物单叶血藤的小孢子发生及雄配子体发育过程。其花药壁发育类型为基本型。周缘细胞经2次平周分裂形成4层细胞,其中有些细胞仍能进行一次平周分裂,最后分别发育为纤维状加厚的药室内壁、中层和绒毡层。腺质绒毡层的细胞中可见乌氏体和脂质球状体。小孢子母细胞减数分裂胞质分裂为同时型,产生正四面体型四分体。成熟花粉为二细胞型。The formation of microspores and development of male gametes in Sargentodoxa simplicifolia are first reported. Its anther wall development follows the basic type. By 2 periclinal cell divisions, the primary parietal layer produces 4 layers, which finally develop into fibrous endothecium, middle layers and tapetums. During this course, some cells of the 4 layers show the ability of periclinal cell division. Ubisch bodies and lipid bodies are found in the glandular tapetums. In meiosis of microsporocyte, cytokinesisis is a simultaneous type,which produces an isobilateral tetrad. Pollen grains are twocelled mature.

关 键 词：大血藤科 单叶血藤 胚胎学 小孢子 雄配子体 

分 类 号：Q944.58[生物学—植物学]