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。
Genesis of megaspore and development of embryo sac in Carica papaya L.
番木瓜的大孢子发生与胚囊发育。
Generally, the chalazal megaspore functions while the remaining three degenerate.
珠孔端3个退化，合点端为功能大孢子。
Function megaspore is in the chalaza and the monosporic embryo sac is chenopodiad type.
功能大孢子位于合点端，大孢子发育为蓼型胚囊。
The archesporial cell below nucellus epiderm functions directly as the megaspore mother cell.
珠心表皮下的雌性孢原直接发育为大孢子母细胞。
Successive cytokinesis in the megasporocyte follows meiosis and the megaspore tetrads are linear.
大孢子母细胞减数分裂形成直线型四分体。
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。
Megaspore tetrad is linear. The chalazal megaspore develops into an embryo sac of Polygonum type.
大孢子四分体为线形，合点端功能大孢子发育成为蓼型胚囊。
Arrangement of megaspore is linear shaped, the megaspore of chalazal end is functional megaspore.
大孢子排列为直线型，合点端大孢子为功能大孢子。
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。
As development goes on, callose fluorescence disappears in the chalazal wall of diplosporous functional megaspore.
二倍体功能大孢子的合点端细胞壁内的胼胝质荧光消失。
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