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A sperm cell develops from a sperm mother cell. 精细胞从精母细胞发育而成。
Meiosis of microspore mother cells is synchronous or unsynchronous. 小孢子母细胞减数分裂同步或不同步。
The sporogenous cell develops into microspore mother cell. 造孢细胞直接发育成小孢子母细胞。
The haploid pollen cells develop in the tapetal zone from spore mother cells. 单倍体花粉细胞由绒毡层提供营养发育。
Successive cytokinesis in the microspore mother cells (MMCs) follows meiosis. 小孢子母细胞减数分裂的胞质分裂为连续型。
The chalazal end megaspore develops into the embryo sac mother cell. 合点端大孢子发育为胚囊母细胞。
The megaspore mother cell meiosis to form a linear megaspore tetrad. 大孢子母细胞减数分裂产生直线形大孢子四分体。
Of the four products of a megaspore mother cell, three usually abort. 在大孢子母细胞分裂产生的四个孢子中，三个会解体消失。
Spore mother cell A cell that gives rise to four haploid spores by meiosis. 孢子母细胞：可以发生减数分裂产生四个单倍体孢子的细胞。
Tapetum (pl. tapeta) A food-rich layer surrounding the spore mother cells in the anthers of vascular plants. 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。
The nucleus in shrinking cytoplasm of microspore mother cell enters into diakinesis stage.16. 收缩的小孢子母细胞中核进入减数分裂终变期。
There is only one layer of parietal cells at the stage of sporogenous cell, megaspore mother cell and tetrad. 造孢细胞,大孢子母细胞和四分体时期,周缘细胞仅1层。
Global or filament actin was visualized in cytoplasm and nucleus of tobacco pollen mother cells, under immunoelectron microscope. 免疫电镜观察发现，花粉母细胞中的细胞质及核中存在线状和粒状的肌动蛋白微丝。
The gametophyte is derived from the product of a reduction division in the megaspore mother cell. 该配子体是由大孢子母细胞进行减数分裂而来。
Unlike the companion cells of angiosperms, they are not derived from the same mother cell as the sieve cell. 但与被子植物的伴胞不同，它们不和筛胞起源于一个共同的母细胞。
The cytokinesis of the microspore mother cells in meiosis is successive and the microspore tetrads are tetrahedial. 小孢子母细胞减数分裂中的胞质分裂为连续型，四分孢子为四面体型；
The developments of haustorial mother cells and haustoria were retarded, malformed, and necrotized. 吸器母细胞和吸器发育受阻，畸形，坏死。
In theterosporous species, a distinction is usually made between megaspore mother cells and microspore mother cells. 在异型孢子体种类中，可区分为大孢子母细胞和小孢子母细胞。
Microspore mother cells in an anther started but di d not end the meiosis at the same time. 小孢子母细胞减数分裂同时开始，但不同时结束，分裂过程高度不同步。
He was disobedient to his mother. 他不听他母亲的话。

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