属薄珠心，胚囊形成时珠心细胞全部消失。
利用改进的GMA半薄连续切片技术对水稻品种IR36胚囊形成和发育进行了研究。
The process of embryo sac formation and development in rice (cultivar IR36) was studied by the modified GMA semi-thin serial sectioning technique.
当胚发育到4—6个细胞时，在胚囊珠孔瑞的游离核之间先形成细胞壁。细胞壁的形成是以自由壁的方式从珠孔端到合点端自外向内进行。
The free cell wall formation occurs first in the micropylar end when the embryo is 4-6 celled stage, then to the chalazal end and the center.
通常指两个位于胚囊中间的单倍体核，他们可能融合形成一个二核的中央细胞。
Polar nuclei The, usually two, haploid nuclei found midway along the EMBRYOSAC, forming a binucleate central cell. They may fuse to form the diploid definitive nucleus.
本工作对苎麻花药的发育和花粉粒的形成、胚珠的发育和胚囊的形成进行了观察。
In present work, the development of anther, formation of pollen grain and development of ovule and formation of embryo sac in Ramie were observed.
这些异常可能最终导致多种结构异常成熟胚囊的形成。
These abnormalities would cause the abnormal structure of mature embryo sac.
大孢子的发育及胚囊的形成：造孢时期，造孢细胞发育成大孢子母细胞。
Development of megaspore and formation of embryo sac: the ovule has a layer of parietal cells at the sporogenous stage.
同一品种内异常类型的频率也存在明显的差异，显示异常结构胚囊的形成可能与品种的基因型有密切关系。
The percentage of each kind of abnormal embryo sac was significantly different in each variety, suggesting that the abnormal phenomena were related possibly to the genotype of variety.
当胚乳游离核达到1 6或32个时，最早的珠心胚原始细胞由靠近胚囊珠孔端的珠心细胞分化形成。
When the free nuclei of the endosperm were 16 or 32, the nucellar embryo initial (s) originated from the nucellar cells near the micropylar end of the embryo sac.
当胚乳游离核达到1 6或32个时，最早的珠心胚原始细胞由靠近胚囊珠孔端的珠心细胞分化形成。
When the free nuclei of the endosperm were 16 or 32, the nucellar embryo initial (s) originated from the nucellar cells near the micropylar end of the embryo sac.
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