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- 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。
- 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。
- The megaspore tetrad is linear, but only the megaspore near thechalazal end remain The formation of embryo sac is Polygonum type. 功能大孢子为合点端的一个单孢子,胚囊发育类型为蓼型;
- 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。
- megaspore tetrad 四分大孢子
- The chalazal megaspore of a linear tetrad develops into a polygonum type sac. 四分体线行排列,合点端的大孢子发育为蓼型胚囊。
- 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 functional megaspore in the linear tetrad is the one at the chalazal end.The development of the embryo sac is the polygonum type. 大孢子四分体为直线型、少数为“T”型排列,合点端的一个为功能性大孢子。
- The micronuclei were not observed in tetrad stage . 四分体阶段有微核。
- The other cells of the tetrad undergo degeneration. 胚囊发育类型为单孢子蓼型胚囊;
- The microspores in tetrad stage showed tetrahedron structure. 小孢子四分体为四面体型。
- Which undergoes meitotic division and forms a linear tetrad. 由孢原细胞直接发育形成大孢子母细胞。
- Abnormal development was observed at tetrad and mature embryo sac. 在四分体和成熟胚囊时期观察到了异常发育现象。
- 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。
- 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。
- 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。
- At tetrad stage, dyad, triad, tetrad with micronucleus and polyad appeared. 四分体时期还出现二分体、三分体、含微核的异常四分体及多分体。
- The pattern of microspores in the tetrad period is of tetrahedron type. 小孢子四分体时期其排列为四面体型。
- In tetrad stage, the structures of tapetal cells begin to dissociate. 四分体时期,绒毡层细胞内部结构开始解体。
- There were micronuclei and tetraspores of various types in the tetrad stage . 四分体阶段有微核和不同类型的四分孢子群。