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- Cytokinesis is of the simultaneous type and microspore tetrads are mainly tetrahedral. 小孢子母细胞减数分裂为同时型,四分体的排列方式为四面体形;
- The cytokinesis of the microspore mother cells in meiosis is successive and the microspore tetrads are tetrahedial. 小孢子母细胞减数分裂中的胞质分裂为连续型,四分孢子为四面体型;
- Cytokinesis in the microspore is of the simultaneous type and microspore tetrads are mainly tetrahedral.Pollen grains are mainly 2-celled when shed. 小孢子母细胞减数分裂为同时型,四分体的排列方式为四面体型,成熟花粉是2.;细胞型。
- microspore tetrad 四分小孢子
- 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。
- Micronucleus and a lot of abnormal cells can be observed at dyad, tetrad and microspore. 二分体、四分体和小孢子时期,细胞内普遍观察到微核,且出现大量异形细胞。
- The microsporic tetrads of the fertile line belonged to the tetrahedral type, and mature pollen was two-celled with bristles on the surface. 可育系小孢子母细胞经过减数分裂形成四面体形的四分体,成熟花粉是二细胞型,表面有刺。
- The abnormality of tetrad callose wall degradation and tapetum development was associated with the abortion of microspore. 导致小孢子败育的原因与四分体胼胝质壁不适时解体和绒毡层细胞发育异常、延迟解体有关。
- Depositions of wall started at the late stage of tetrad, and the exine was fundamentally completed by late stage of microspore. 小孢子外壁的沉积始于四分体晚期,至小孢子晚期外壁已基本发育完全。
- Organells including endoplasmic reticulum, mitochondria, plastids, dictyosome and sphaeroplassts are rich in microspore at meiosis and tetrad stages. 减数分裂和四分体时期,细胞处于明显的代谢活跃状态,细胞器丰富,主要有内质网、线粒体、质体、高尔基体和球状体;
- The exine deposition is initiated during the tetrad stage, and the intine formation begins at vacuolated microspore stage. 小孢子在四分体时期开始沉积花粉外壁,小孢子大液泡化时期开始沉积花粉内壁。
- 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;
- Abort microspore in crescent or irregular shape.26. 月牙形和不规则形的败育小孢子。
- The formation of microspore in Allium fistulosum L. 小孢子的形成。
- The microspore lacks a large central vacuole. 小孢子缺中央大液泡。
- 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。
- Meiosis of microspore mother cells is synchronous or unsynchronous. 小孢子母细胞减数分裂同步或不同步。