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- The microspores in tetrad stage showed three arrangements, such as isobilateral tetrad, decussate tetrad, and tetrahedral tetrad. 四分体有3种类型: 左右对称型、四面体型、交叉型;
- Cytokinesis in microspore mother cells is simultaneous, forming tetrahedral tetrads. 小孢子母细胞的分裂属于同时型，产生四面体排列的小孢子。
- The microspore mother cells undergo meiosis, the tetrahedral tetrads of microspores are formed by simultaneous cytokinesis. 花粉母细胞减数分裂后细胞质同时型分裂。
- tetrahedral tetrad 四面体形四合花粉
- Cytokinesis was simultaneous and the arra ngement of microspores in the tetrad was tetrahedral. 胞质分裂为同时型，四分体中小孢子排列呈正四面体形。
- The cytokinesis of microspore mother cell in meiosis is simuteneous,and the tetrad are tetrahedral. 四分体胞质分裂为同时型。
- During the microsporocyte meiosis process, the cytoplasm division could be attributed to the simultaneous type, while the microsporocyte tetrad belongs to tetrahedral type. 小孢子母细胞减数分裂过程中的胞质分裂为同时型，小孢子4分体为四面体形；
- 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 pollen grains still to keep tetrahedral form. 小孢子四分体为四面体型。
- Only a fraction of the A ions are in tetrahedral sites. 只有一部分A离子处在四面体的位置上。
- 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。
- Tetrahedral tetrads 四合体花粉
- 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。
- Results: The established model had 62 182 nodes and 40 878 tetrahedral units. 结果:建立的锁骨有限元模型节点共62 182个、四面体单元40 878个。
- 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。
- 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。
- 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。
