sporogenous cell

Primary sporogenous cell forms directly megaspore mother cell .

初生造孢细胞直接形成大孢子母细胞。

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

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。

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。

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

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。

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

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。

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。

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

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 result were as follows : The embryonic development began in the nucellus tissue from a archesporium cell which would divide to a sporogenous cell and a parietal cell .

结果表明：锥栗胚胎发育始于珠心组织中的一枚孢原细胞。

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 .

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 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。