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- 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。
- So it defined as crassinucellate.The megaspore mother cell divides transversally to form a linear megaspore tetrad.The megaspore at the chalazal end develops into the embryo sac mother cell. 大孢子母细胞经横向分裂后产生一直线形的大孢子四分体,之后位居合点端之大孢子发育成胚囊母细胞。
- Observation by paraffin section showed that Lipeng No.2 embryo sac mother cells were almost entirely degenerated during megasporogenesis. 切片观察发现,丽??号胚囊母细胞在四核期已完全退化。
- Observation by paraffin section showed that Lipeng No. 2 embryo sac mother cells were almost entirely degenerated during megasporogenesis. 切片观察发现,丽椪2号胚囊母细胞在四核期已完全退化。
- embryo sac mother cell(EMC) 胚囊母细胞
- embryo sac mother cell 大孢子母细胞,胚囊母细胞
- Mature embryo sac can form from megaspore mother cell on the modified VW medium supplemented with 0.5mg/L BA and 0.1 mg/L NAA. 在改良VW培养基上添加0.;5 mg/L BA和0
- Cytokinesis in the megaspore mother cell accompanies meiosis and the Chalaza megaspore of a linear three cells develops into 8-nuclealeate.The development of embryo sac is of the Polygonum type. 大孢子母细胞减数分裂形成三分体即3个大孢子,合点端的大孢子发育为胚囊,胚囊蓼型。
- Wall ingrowths occurred in central cell at micropylar region near embryo sac wall. 中央细胞在珠孔端与胚囊壁相邻的部位形成壁内突。
- Both polygonum type and panicum type embryo sac have embellum. 有性生殖和无孢子生殖的胚囊中均有胚珠附器存在;
- 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。
- In the gymnosperms the megaspore gives rise to a cell that is termed the embryo sac because of its similarity to the angiosperm structure. 在裸子植物中,大孢子也产生一个细胞,因为它类似于被子植物的胚囊细胞,故也可以称之为胚囊。
- Mature embryo sac has 8 nucleis.Egg cell has obvious polarity.One synergid degenerates before fertilization, the other does after fertilization. 成熟胚囊为八核七细胞,卵细胞极性明显,助细胞在极核融合前已退化一个,另一个宿存,宿存助细胞丝状器明显,并保留退化助细胞的痕迹。
- A sperm cell develops from a sperm mother cell. 精细胞从精母细胞发育而成。
- 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。
- These abnormalities would cause the abnormal structure of mature embryo sac. 这些异常可能最终导致多种结构异常成熟胚囊的形成。
- While in the Angiophyta the female gametophyte is simply the EMBRYO SAC. 被子植物门的雌配子体为简单的胚囊;
- Matureembryo sac can form from megaspore mother cell on the modified VW medium supplemented with 0.5mg/L BA and 0.1 mg/L NAA. 在改良VW培养基上添加0.;5mg/LBA和0
- The development of embryo sac in Prunus americana Marsh var. is often abnormal. 鸡心李(Prunus americana Marsh var.;)
- With embryo sac haustorium in chalazal end,the embryo sac is Endymion type. 胚囊发育类型为英地百合型 ,合点端形成胚囊吸器。