| 摘要: |
| 含笑的花药具4个小孢子囊,花药壁由表皮、药室内壁、3～6层中层和绒毡层组成。绒毡层细胞在发育后期由单核分裂为2核,原位解体,为腺质型; 小孢子母细胞在减数分裂过程中胞质分裂为同时型,小孢子四分体为四面体型,也有左右对称型的; 成熟花粉为3细胞型。在前人对含笑小孢子发生和雄配子体发育的观察描述基础上,丰富了含笑的胚胎学资料,并对其系统学意义进行了探讨。 |
| 关键词: 含笑 小孢子发生 雄配子体 花药壁 系统学 |
| DOI： |
| 分类号:Q944.4 |
| 基金项目: |
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| Microsporogenesis, development of male gametophyte in Michelia figo and their systematic significance |
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AO Cheng-Qi
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School of Life and Environmental Sciences, Wenzhou university, Wenzhou 325027, China
School of Life and Environmental Sciences, Wenzhou university, Wenzhou 325027, China
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| Abstract: |
| For Michelia figo,there are four microsparangia in the anther whose wall is composed of epidermis,endothecium,3-6 middle layers and a tapetum. The antheral tapetum,consisting of monocyte-or binucleated cells,degenerated in situ,thus belonging to glandular type. The simultaneous cytokinesis in microspore mother cells leads to tetrahedral as well as isobilateral(bilaterally symmetrical)tetrads. The mature pollen grains are 3 celled. In the present study embryological features of M.figo were depicted further based on the former relative reports and their systematic significance was discussed. |
| Key words: Michelia figo microsporogenesis male gametophyte anther wall systematics |
