薄皮甜瓜雄花小孢子发生与雄配子体发育的研究

[目的]研究薄皮甜瓜(Cucumis melo L.)小孢子发生与雄配子体发育的规律。[方法]以薄皮甜瓜(龙甜四号)雄花为研究对象,利用传统石蜡切片技术对薄皮甜瓜雄花花芽分化和小孢子发生以及雄配子体发育进行了形态学观察。[结果]薄皮甜瓜雄蕊5枚,聚药雄蕊,花药折叠,花药壁发育为基本型。花药壁由3～4层细胞构成,药室内壁宿存。绒毡层属腺质绒毡层。花粉母细胞减数分裂为同时型。成熟花粉2-细胞型为主。成熟花粉粒一般呈近圆形和近三角形,花粉表面具3个萌发孔。[结论]该研究可为甜瓜性别分化研究奠定理论基础。

Microsporogenesis and the Development of Male Gametophyte in Cucumis melo L.

[Objective] To study the characteristics of the microsporogenesis and the male gametophyte in C.melo.[Method] Traditional paraffin-sectioning method was used to study the development of microsporgenesis and male gametophyte of C.melo.[Result] There were five stamens of C.melo,through synantherous stamen and anther folding,the anther wall development followed the basic type.The anther wall consisted of 3-4 layer cells with fibrous thickenings at the endothecium,and the tape of tapetum was glandular tapetum.The cytokinesis followed meiosis was simultaneus.Most pollen grains were 2-mature.The matured pollen was subround or triangle with 3 colporates.[Conclusion] The research lays theoretical foundation for the sex differentiation of C.melo.