摘要
运用常规石蜡切片技术对蒙古莸小孢子发生和雄配子体发育进行了观察.结果表明:(1)花药4室,花药壁由4层细胞组成,由外向内分别为表皮、药室内壁、1层中层和绒毡层,花药壁发育方式为双子叶型.(2)花药壁表皮具多细胞腺体,药室内壁、药隔部分细胞发育后期均发生纤维性加厚.(3)绒毡层细胞有两种来源,外周部分来源于初生壁细胞,近药隔部分来源于药隔细胞.腺质绒毡层,发育后期为二核.(4)小孢子母细胞减数分裂过程胞质分裂为同时型,四分体多数为四面体型,偶有左右对称型.(5)成熟花粉为2细胞型,具3个萌发沟.
The microsporogenesis and development of male gametophyte of Caryopteris rnongholica Bunge were observed by means of conventional paraffin sections. The results showed： （1） The anther has four chambers and the development of anther wall is dicotyledonous type, which is composed of epidermis, endothecium,has one middle layer and glandular tapetum with two nucleate cells. （2）There are multicellular glands on the epidermis of anther. Wall thickening occurs in both endothecium and some cells of connective tissue. （3）The tapetum has dual origin： towards outside the tapetum is derived from the primary parietal layer,whereas on the inner side itdevelops from the cells of the connective. （4）The cytokinesis of micro- spore mother cell in meiosis is simultaneous, and the tetrads are tetrahedral, occasionally isohilateral. （5）The mature pollen grains are two-cells with three colpates.
出处
《西北植物学报》
CAS
CSCD
北大核心
2009年第6期1149-1154,共6页
Acta Botanica Boreali-Occidentalia Sinica
基金
内蒙古自然科学基金(200508010608)
内蒙古农业大学博士科研启动基金(13622)
关键词
蒙古莸
小孢子发生
雄配子体
Caryopteris mongholica Bunge
microsporogenesis
male gametophyte
