囊胚

Further studies should be done to confirm if Est-4, Acp-2 and Acp-3 could regulate the development of 8-nucleat embryo sac.

授粉后Est和Acp的酶位点变化说明与胚珠发育相关的一系列基因表达有时序性，位点Est-4、Acp-2和Acp-3是否直接参与了八核胚囊发育的控制，有待于进一步的研究。

A minute structure in seed plants,containing the embryo sac and surrounded by the nucellus,that develops into a seed after fertilization .

胚珠种子植物的一个小的结构，含有胚囊并被珠心所包围，施肥后长成种子受精的产物是杂合子。

In the late of April of the second year, male inflorescences unbound and pollinated. When female inflorescences accepted the pollen grains, ovary development was increased in early May. With the development of either of the two ovule, funiculus, integument and nucellus were differentiated. Embryo sac mother cell came into being and the meiosis begins. Then fuctional megaspore developed into matured embryo sac that contain eight nucleuses. In the end of May, double fertilization generated.

次年，4月下旬，雄花序解螺旋散粉，雌花序开花授粉；5月上旬，雌花序授粉后，迅速增长，子房膨大，两个胚珠分化出珠柄、珠被和珠心，珠心中产生孢原细胞；5月中下旬，大孢子母细胞形成并减数分裂，功能性大孢子形成成熟的八核胚囊；5月底，发生双受精。

Although the megagametophyte formed and even the double fertilization had been finished 70 days after pollination at normal temperature, the megasporogenesis had not yet been finished at low temperature.

低温(12-18℃)处理的蝴蝶兰，授粉50d开始分化胚珠原基、60 d胚囊处于大孢子母细胞时期，比常温(20-25℃)下的推迟10-15 d；授粉70 d，常温下的蝴蝶兰植株已完成雌配子体发育和双受精，而低温处理的蝴蝶兰仍未完成大孢子的发生过程。

The results are summarized as follows: tin the polygonum embryo sac of tetraploid grape , megaspore telrad arranged in straight line.

结果如下：在四倍体葡萄的蓼型胚囊中，四分体孢子呈直线排列，合点端的大孢子发育胚囊。

The development of anther and ovule followed the finish of the flower organ initiation. Pollen mother cells and well developed microsporagium wall occurred when the diameter of the bud reached about 3.0 mm, and the archesporial cell which played the role of megaspore mother cell formed in ovule when the diameter of the bud reached about 3.5 mm.

花药及胚珠的发育与花器官的形态发生之间有明显的连续性，当花蕾直径为3.0 mm左右时花粉母细胞及完整的花粉囊壁形成，直径达到3.5 mm左右时胚珠中出现孢原细胞的分化，它直接起大孢子母细胞的功能。

The quantities of starch grains in the two"cells"in micropyle part of embryosac gradually decrease and become unclear.With the further development of embryosac the starch grains in the central cell and antipodal cell disappear in succession,however,the egg cell does not.

在准极核移向胚囊中部前后，不同的功能性细胞有不同的表现，珠孔端的两个"细胞"淀粉粒数量逐渐减少并变得不明显，随着胚囊的进一步发育，其中中央细胞和反足细胞内的淀粉粒相继消失，但卵细胞内却一直保存着。

A minute structure in seed plants, containing the embryo sac and surrounded by the nucellus, that develops into a seed after fertilization.

胚珠种子植物的一个小的结构，含有胚囊并被珠心所包围，施肥后长成种子

Perisperm The nutritive tissue in the seeds of many Caryophyllaceae.It is a diploid tissue derived from the nucellus rather than the embryosac.

外胚乳：存在于多数石竹科植物的种子中的营养组织，二倍性，来源于珠心而不是胚囊。

Each embryo were inoculated by a dose of 1×104 pure sporozoites was injected with testing Bt crystal proteins before 24 hours. The varying oocyst inhibition rates of embryos brought about by Bt crystal proteins that were given at various doses were used as a criterion for determining the activity of Bt crystal proteins.

每一鸡胚接种1×104个子孢子，于感染前24h注入苏云金杆菌晶体蛋白，以不同苏云金杆菌晶体蛋白对鸡胚卵囊所产生的抑制率的差异，判定苏云金杆菌的活性。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。