摘要
杜仲(Eucommia ulmoides Oliv)小孢子母细胞减数分裂属同时型。小孢子阶段短暂,当细胞体积略增大,未形成液泡时,细胞核由中部移向边缘即进行第一次分裂。在分裂中期,多数纺锤体轴垂直于花粉壁,呈不对称形;少数平行于壁,其两极相似。分裂过程中细胞质内逐渐形成几个大液泡,并消耗贮藏淀粉。生殖细胞位于边缘时,与营养细胞间的拱形壁呈PAS正反应。随后当生殖细胞内移到营养细胞质内的过程中,液泡逐渐解体,贮藏物质重新累积,花粉体积增大。成熟花粉具三沟孔,二细胞型。花粉管单一无分枝,当生殖细胞在花粉管中分裂时,营养核由椭圆形变长,结构松散,并处于其近侧。二个精子一前一后相接近,营养核紧邻其前端,未见有在其后面的现象。
The meiotic division of the microspore mother cell of Eucommia ulmoides Oliv belong to simultaneous type. The duration of the tetrad is shortly, The nuclear of single-nuclear-microspore displaces from the center to boundary, namely, it is going to the first mitosis, forming the large tropho cell and the small reproductive cell.In this time, the vacuole changes from small to large, but cannot forming the large central vacuole. Stored amyloplastid decrease gradually or disappear. When the reproductive cell just out and displaces in the tropho cell gradually. Vacuole will be disintegration and the stored amyloplastid increase gradually. Maturation anther dust is Z type. Single anther dust tube, No ramous. Trophonuclears infront, appears irregular and scattered stated. Feulgen reaction is weakness. Reproductive cell divided and from 2 sperms in the anther dust tube.
出处
《西北植物学报》
CAS
CSCD
北大核心
1993年第1期30-35,共6页
Acta Botanica Boreali-Occidentalia Sinica
基金
国家自然科学基金
关键词
杜促
雄配子体
胚胎学
发育
Eucommia ulmoides Oliv, male gametophyte, mophological development.
