胚珠的发育(2) 胚囊的结构 胚囊(embryo sac)：是被子植物的雌配子体，由卵细胞、助细胞、 (embryo胚囊(embryo-sac)：是被子植物的雌配子体，由卵细胞、助细胞、极核和反足细...
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embryo sac mother cell 大孢子母细胞 ; [植] 胚囊母细胞
bisporic embryo sac [植] 双孢子胚囊 ; [植] 双孢胚囊
tetrasporic embryo sac [植] 四孢子胚囊
monosporic embryo sac [植] 单孢子胚囊
Through paraffin section,we can see that the embryogenesis was originated inside the embryo sac.
通过石蜡切片初步观察了孤雌生殖的胚胎发生过程，发现胚胎发生是从胚囊里的单倍体细胞起源的。
参考来源 - 玉米的单倍体育种及基因转化的研究The mature embryo sac is growth after spread pollen 4～6 days.
胚囊的成熟发生于散粉后第4～6天。
参考来源 - 南蛇藤（Celastrus orbiculatus Thunb.）胚胎学研究·2,447,543篇论文数据，部分数据来源于NoteExpress
N the structure within a plant ovule that contains the egg cell: develops from the megaspore and contains the embryo plant and endosperm after fertilization 胚囊
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