造孢细胞

初生造孢细胞直接形成大孢子母细胞。

Primary sporogenous cell forms directly megaspore mother cell .

孢原细胞进行平周分裂形成一个周缘细胞和一个造孢细胞。

The archesporium is divided into a parietal cell and a sporogenous cell , by the periclinal division .

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 .

抱原细胞单列.初生造孢细胞不经分裂、直接发育成一纵列的小抱子母细胞。

A row of microspore mother cells develop directly from the primary sporogenous cells .

初生造孢细胞经过分裂形成次生造孢细胞，最后发育为小孢子母细胞。

The primary sporogenous cells divide into secondary sporogenous cells , and develop to microspore mother cells ultimately .

药室内壁、中层层数增加，绒毡层细胞肥大，造孢细胞或花粉母细胞分解解体；⑤由于花粉母细胞胼胝质壁不降解而无法释放出四分体小孢子；

Cell layers of powder chamber wall and middle-level were increased , tapetum cells were hypertrophied and microsporogenesis or microspore disaggregated ;

初生造孢细胞直接行小孢子母细胞的功能，在小孢子囊中成单列。

The primary sporogenous cells functioned directly as microspore mother cells and were arranged in a single row in a microsporangium .

造孢细胞，大孢子母细胞和四分体时期，周缘细胞仅1层。

There is only one layer of parietal cells at the stage of sporogenous cell , megaspore mother cell and tetrad .

有的没有造孢细胞的形成故花药没有药室，有的只有1个药室。

As the sporogenous cell did not form or degenerated some anthers had no pollen sac at all , some had one .

我们已对晋A细胞质雄性不育系进行了细胞生物学基础方面的研究，研究结果表明：晋A不育系的败育时期主要在造孢细胞增殖&小孢子母细胞形成时期。

We had found that the auxocyte abortion of Jin A took place at the stage of sporogenous cell division-microspore mother cells formed .

小孢子发育的超微结构观察发现，晋A不育系在造孢细胞增殖时期即表现出败育迹象。

Through ultra-structure observation , it is found that the microspore of Jin A began to abort at the stage of sporogenous cell division .

小孢子母细胞是由次生造孢细胞分裂后发育而来的。其减数分裂中的胞质分裂为同时型，四分体的排列主要为四面体型，也有交叉型。

Will is primary . Cytokinesis of micro - sporocyte meiosis is simultaneous type and results in the microspore tetrad of tetrahedral and decussate .

孢原细胞平周分裂形成一个周缘细胞和一个造孢细胞，造孢细胞直接发育成大孢子母细胞，四分体大孢子呈线形排列，它们均可成为功能大孢子；

The sporogenous cell functioned directly as megaspore mother cell . The tetrad of megaspores was linear in arrangement , and every megaspore might be functional .

结果发现，黑麦花药中胼胝质的合成最早出现在造孢细胞晚期，并首先在小孢子囊中央的造孢细胞中沉积，随后向小孢子囊两端的细胞扩展。

It was found that the callose component initially occurred at late sporogenous cells stage in the cells located in center of microsporangium , and late extended towards the cells lying at its two ends .

初生造孢细胞经过有丝分裂，形成次生造孢细胞，然后次生造孢细胞发育成小孢子母细胞，小孢子母细胞经过减数分裂形成四分体，胞质分裂为同时型。

During the mitosis of microspore mother cells , the nucleus of tapetum divides into two . The primary sporogenous cells develop into microsporocyte by mitosis . The microsporocyte undergoes simultaneous meiotic division and produces tetrahedral tetrad .

造孢细胞直接发育成大孢子母细胞，它进行减数分裂形成四个呈T&形排列的大孢子，只有合点端的一个大孢子发育成胚囊。

The megaspore mather cell is derived from the sporogenous cell , and divided into four megaspores by the meiotic division , megaspores present the rank of T & type , among which only one near chalaza can be developed to the embryo sac .

造孢细胞在7月下旬形成，8月上旬形成小孢子母细胞，8月下旬开始减数分裂，于10月上旬进入双线期，并以双线期渡过休眠。

The sporogenous cell occurs in late July and develops into the microspore mother cell in early August . In early August , the latter starts its meiosis and enters into its diplotene phase in early October and later goes through dormancy in this form .