查询词典 egg cell

It takes about 0.5 h for a pollen tube from germination to arrive at the micropyle. About 0.5 h after pollination, the pollen tube releases two sperms into one synergid. At 0.5-2.5 h after pollination, the egg cell fuses with one sperm to form a zygote. About 10.0 h after pollination, the division of the zygote begins. The duration of the zygote lasts about 2.5-10.0 h. However, one sperm nucleus fuses with two polar nuclei at 1.0-3.0 h after pollination, and 5.0 h after pollination the primary endosperm nucleus begins to divide.

水稻受精过程经历的时间表如下：授粉后，花粉在柱头萌发；花粉萌发至花粉管进入珠孔大约需要0.5小时；授粉后0.5小时左右，花粉管进入一个助细胞，释放精子；授粉后0.5-2.5小时，精卵融合形成合子；授粉后约10.0小时，合子第1次分裂，合子期为授粉后2.5-10.0小时；授粉后1.0-3.0小时，精核与两极核融合；授粉后约5.0小时，初生胚乳核分裂。

Ultrastructurally, the chalazal border of the mature egg cell demonstrates regularly discontinuous regions in which exist a great number of single or double-membrane vesicles.

卵细胞中的质体多含淀粉粒，精细胞中的质体均不含淀粉粒。DNA荧光显示，卵细胞质中具丰富的类核并可以断定环状类核为线粒体DNA。

The nucleus of mature egg cell was located at the micropylar end and a great deal of starch grains were in the cytoplasm surrounding the nucleus.

胚囊发育为蓼型，反足细胞分裂形成反足组织，反足组织含有大量淀粉粒，反足细胞直到胚乳细胞化时才退化，反足细胞在胚和胚乳发育中起着积极作用。

The morphogenic development of an egg cell into a living creature is full of inherited baggage that constrains the possible variety of its potential descendants.

由卵细胞成长为活体生物的形态发育过程，载满祖先的条条框框，限制[1]了其潜在后裔可能具有的多样性。

We used transmission electron microscopy to study the ultrastructural changes in egg cell, zygote and two-celled proembryo of Beta vulgaris to provide information on the reproductive biology of angiosperms and related research into sugar beet.

为丰富被子植物生殖生物学资料，并为甜菜相关研究提供参考，应用透射电镜技术研究栽培甜菜卵细胞、合子和二细胞原胚的超微结构特征。

The word "evolution," in fact, originally meant the unrolling development of an egg cell into an embryonic creature.

实际上，&进化&这个词，最初只是用来表示一个卵细胞分裂扩展成一个胚胎生物的过程。

The word "evolution," in fact, originally meant the unrolling development of an egg cell into an embryonic creature.

实际上，&进化&这个词，最初只是用来表示一个卵细胞分裂增殖扩展成一个胚胎生物的过程。

The fertilization was processed by sperm in mature male gametophyte combining with egg cell on the top of archegonia on June 15 or so.

摘要樟子松发育成熟的雄配子体中的精子6月15日左右在颈卵器中上部与卵细胞结合，进行受精作用，其后，受精卵进行游离核分裂，形成8个子核时，开始形成细胞壁。

Electron micrograph showing transcription of ribosomal RNA genes in the developing egg cell of the spotted newt.

电子显微镜显示了斑点蝾螈卵细胞在发育过程中核糖体RNA基因的转录。

METHODS Xenopus leavis females were injected with HCG, eggs were harvested next morning and dejellied by 2% cysteine, from which the Xenopus leavis egg cell free translating system was prepared.

而基因功能的研究离不开基因的表达，这就迫切需要一种操作简便，适用范围广的表达工具来表达有功能的蛋白质。方法非洲爪蟾注射HCG催卵，2%半胱氨酸去胶膜，高速离心制备卵提取物，即为非洲爪蟾卵非细胞翻译体系。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。