胚珠是半球形的，有2个被膜，腱鞘状，而原孢子细胞直接作为大孢子母细胞起作用。
The ovules are hemitropous, with 2 integuments, tenuinucellate and the archesporial cell functions directly as the mega-spore mother cell.
相邻小孢子母细胞之间有胞质通道。
There are some cytoplasmicchannels present between adjacent microsporocytes.
绒毡层细胞仲入小孢子母细胞之间形成“小梁”。
The tapetal cells invest in the sporogenous tissue and form "the Balken".
孢原细胞处于珠心表皮之下，直接起大孢子母细胞的功能。
A single archesporium differentiates immediately below the nucellar epidermis, it functions directly the megaspore mother cell.
绒毡层：维管植物花粉囊内包围孢子母细胞的富含营养物质的一层结构。
Tapetum (pl. tapeta) A food-rich layer surrounding the spore mother cells in the anthers of vascular plants.
马铃薯花药中的造孢细胞产生3 ~4层时，进而变成小孢子母细胞。
When sporogenous cells in potato anther produced 3-4 layers they became microsporocytes.
结果发现小孢子母细胞和四分体小孢子中积累了一些脂滴，但没有淀粉。
The results showed that microspore mother cells and tetrad microspores accumulated numerous lipids but no starches.
大孢子和雌配子体发生：孢原为一个细胞，它直接起大孢子母细胞功能。
Megasporogenesis and Female Gametogenesis: Archesporium is of one cell, it directly functions as macrospore mother cell.
大孢子的发育及胚囊的形成：造孢时期，造孢细胞发育成大孢子母细胞。
Development of megaspore and formation of embryo sac: the ovule has a layer of parietal cells at the sporogenous stage.
花分化过程中，外源乙烯诱导小孢子败育起始于造孢细胞至小孢子母细胞时期。
In the process of litchi flower differentiation, the microspore abortion induced by external ethylene starts from the transition period (from sporogenous cells to microsporocytes).
结果表明，1晋a不育系雄性败育的主要时期是在造孢细胞增殖——小孢子母细胞形成时期。
The results showed that: (1) the auxocyte abortion of Jin a took place at the stage of sporogenous cell division.
子房具胚珠20—23枚，胚珠横生，珠被二层，薄珠心，孢原细胞直接起大孢子母细胞作用。
The ovary contains 20-23 ovules. The ovules are hemitropous, with 2 integuments, tenuinucellate and the archesporial cell functions directly as the mega-spore mother cell.
在不育花药中，最早出现的钙颗粒异常分布是在小孢子母细胞的胼胝质壁中积累了较多的钙颗粒。
In sterile anthers, abnormal distribution of calcium gran - ules first appeared in callus wall of microspore mother cell (Plate IV-1).
用光镜和透射电镜的系统观察表明，小孢子母细胞间胞质通道的发育是棉花小孢子发生过程中最显著的特点之一。
Light and electron microscopy studies revealed that the cytoplasmic channel in the wall of adjacent meiocytes was an obvious feature during microsporogenesis in Gossypium hirsutum.
单瓣紫花木槿的小孢子母细胞经过减数分裂形成四面体状的四分体，成熟花粉是二细胞型花粉，圆球型，表面有刺毛。
The results showed that the type of microsporic tetrads of the simple flower is belong to tetrahedral type and the mature pollen is two-celled with bristles on the surface.
单瓣紫花木槿的小孢子母细胞经过减数分裂形成四面体状的四分体，成熟花粉是二细胞型花粉，圆球型，表面有刺毛。
The results showed that the type of microsporic tetrads of the simple flower is belong to tetrahedral type and the mature pollen is two-celled with bristles on the surface.
应用推荐