The mature embryo sac has seven cells.
成熟胚囊内具七个细胞。
How does macrospore developed to embryo sac?
大孢子如何发育成胚囊？
The developed embryo sac has 7 cells containing 8 nuclei.
成熟胚囊为8核组成的7细胞胚囊。
All nucellar cells disappear, when an embryo sac is ripe.
属薄珠心，胚囊形成时珠心细胞全部消失。
Chalazal end of mature embryo sac is narrow and elongated.
成熟胚囊的合点端狭长。
The pollen tube entered into the embryo sac via one synergid.
花粉管经由一个助细胞进入胚囊；
There are 4 ~ 11 antipodal cells in embryo sac of Drusa type.
德鲁撒型变型胚囊中具有4 ~11个反足细胞。
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。
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。
The mature embryo sac contains an egg apparatus, a central cell and three antipodal cells.
成熟胚囊为蓼型胚囊，它包括卵器，一个中央细胞和三个反足细胞。
TyPes of endosPerm and embryo sac and structural feature of susPensor were also discussed.
还对沙打旺胚柄的构造特点，胚乳和胚囊的类型等进行了讨论。
Megaspore tetrad is linear. The chalazal megaspore develops into an embryo sac of Polygonum type.
大孢子四分体为线形，合点端功能大孢子发育成为蓼型胚囊。
Conclusion the success rate of medical abortion is related to gestational age and the diameter of embryo sac.
结论药物流产成功率与孕周、胚囊直径有关。
There ware two cell proembryo and some endosperm free nucleuses in the embryo sac 7-8 days after pollination;
授粉后7-8天，在胚囊中见到二细胞原胚及数个胚乳游离核。
Development of megaspore and formation of embryo sac: the ovule has a layer of parietal cells at the sporogenous stage.
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。
The research for the embryo sac structure of early stable rice showed that 90.8% embryo sacs were normal and 9.3% were not.
对早稳型水稻成熟胚囊结构观察结果表明：正常蓼型胚囊占90.8%，异型胚囊占9.3%。
A mature embryo sac is composed of egg apparatuses (two synergids and one egg cell), central cells and three antipodal cells.
成熟胚囊包含卵器(由两个助细胞、一个卵细胞组成)，中央细胞及三个反足细胞。
Of most two kinds of variant embryo sac, referred as poly egg apparatus embryo sac (53.3%) and double set of embryo sac (6.3%) were found.
其中主要的变异有两类，即多卵卵器胚囊(53.3%)和双套结构胚囊(6.3%)。
Path analysis was studied about 141 accessions involving pollen fertility, anther dehiscence index, embryo sac fertility and seed setting rate.
对141份野生稻的花粉育性、裂药指数、胚囊育性和结实率进行通径分析。
The study on pseudogamy property of wheat parthenogenesis is conducted by means of delaying pollination and observing embryo sac with microscope.
采用延迟授粉和胚胎学显微观察的方法，研究了黑麦和六倍体小黑麦花粉诱导小麦孤雌生殖的假受精特性。
The process of embryo sac formation and development in rice (cultivar IR36) was studied by the modified GMA semi-thin serial sectioning technique.
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。
In present work, the development of anther, formation of pollen grain and development of ovule and formation of embryo sac in Ramie were observed.
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。
Megaspore tetrad is linear. the chalazal megaspore develops into an embryo sac of polygonum type. Hypostase and special integument tapetum exist in the ovule.
大胞子四分体线形排列，合点端大孢子为功能大孢子，胚囊发育类型为蓼型，具有特化的珠被绒毡层和承珠盘。
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。
Observation of citrus embryo development showed that in 50 days or so after pollination there was only one zygotic embryo in the embryo sac, and nucellar embryo was not yet invaded.
通过柑桔胚胎发育观察表明，授粉后50天左右，胚囊内仅有一个合子胚，未见珠心胚侵入胚囊，为单独分离合子胚培养的最好时期。
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.
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.
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。
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