micropyle

Through anatomizing oviposition room and damaged phloem tissue in Tilia mongolica and observing the changing situation of oviposition room and eggs , phloem ray and outflow from medullary ray not only play role on miniature oviposition room , but also directly point towards surface of egg and micropyle .

显微解剖椴树产卵室和受害韧皮组织，观察其卵室和卵的变化情况，揭示了韧皮射线与髓射线流出物不仅作用雏形卵室，而且直指卵表面及卵孔。

Building of Mathematical Model of Unusual Structure on Teleost 's Micropyle

真骨鱼卵膜孔奇异结构的数学建模

Structure of micropyle in Gossypium hirsutum and the pathway of pollen tube growth

陆地棉珠孔的结构及花粉管在其中的生长途径

17 ~ 21 hours the pollen tube reached the embryo sac through the micropyle ;

17～21小时，花粉管经珠孔到达胚囊；

The micropyle is formed with inner integuments and partial outer integument .

珠孔由内珠被和腹侧外珠被构成。

The sperm entry site beneath the micropyle is specialized and derived from the plasma membrane of the egg .

精子进入区由卵子质膜表面特化而成，可区分为精子依附位点和精子入卵位点。

( of a plant ovule ) completely straight with the micropyle at the apex .

（指植物的胚珠）珠孔完全直向顶点。

( of a plant ovule ) curved with the micropyle near the base almost touching its stalk .

（指植物的胚珠）珠孔弯曲接近底部，几乎接触了干。

Our investigations indicate that the structure of the micropyle changes with the different stages of the reproductive process , and becomes asymmetrical during pollination .

我们对黄檗胚珠的珠孔的形态发育研究显示，在不同的生殖时期，珠孔的结构会发生变化，在传粉时期它的结构显示不对称性。

By the 30 seconds postinsemination , the sperm enters the egg cytoplasm via micropyle .

受精30s后，精子通过受精孔进入卵质；

In 30 seconds , 86 % of sperm entered micropylar canal along the grooves around the micropyle ;

在授精开始的30秒内，测得卵膜附近约86%的精子沿着凹沟进入精孔管；

The ovaries grow to stage ⅳ when they are 310 days old , the micropyle and the micropylar cell are very clear .

310d龄鱼进入第Ⅳ期卵巢，Ⅳ时相卵母细胞的受精孔和精孔细胞明显。

The micropyle of the matured oocyte in the phase 5 was blocked up by the micropyle cells .

在第5时相成熟卵子的受精孔中仍有精孔细胞堵塞。

After the newborn endosperm nuclei divided , the cells were formed step by step from the chalaza side to the micropyle side .

次生极核于合点端受精后，逐渐分裂形成细胞。

Developmental Morphology of Obturator and Micropyle and Pathway of Poll Tube Growth in Ovary in Phellodendron amurense ( Rutaceae )

黄檗（芸香科）的珠孔塞和珠孔的形态发育及花粉管在子房室中的生长路径（英文）

In radicle areas , there are palisade cells and a lucuna which located above micropyle and formed via knockdown parenchyma cells .

胚根区有栅栏状细胞，珠孔区以上有薄壁细胞解体后形成的断裂层。

The region of an ovule that is opposite the micropyle , where the integuments and nucellus are joined .

合点珠孔对面的胚珠内结合珠被和珠心的一个区域。

In fish whose sperm structure belongs to the acrosome type , there is no micropyle on the surface of ovum , for example , in Tilapia nilotica .

与此相对应的卵子结构也不相同：精子为顶体类型的鱼类，卵子没有受精孔；

After finding the whirlpool like structure of micropyle of the mature egg of Misgurnus anguillicaudatus in1987 , we discovered again that there is a radiate structure .

继1987年发现泥鳅成熟卵卵膜孔涡旋状结构后，作者又发现大银鱼卵膜孔区域呈现沟脊放射状结构。

The pollen grain germinates on the stigma and the pollen tube grows along the hollow style canal into the ovary chamber at the funicle side and enters the micropyle .

在子房室内，沿珠柄侧的子房内壁生长至与胚珠珠孔相当部位时，花粉管离开子房壁进入珠孔，经珠心冠细胞之间隙抵达胚囊。

8-14 hours after pollination , pollen tube grows in ovary and gets into ovule via micropyle . It is about 1 h from germination to the arrival at micropyle .

授粉后8~14h，花粉管在子房中生长并通过珠孔进入胚珠。自花粉萌发至花粉管长入珠孔大约需要1h。

The zygote , 2-cell proembryo , T-proembryo , multicellular proembryo , small globular embryo and endosperm nucleus diffusion to micropyle were observed in succession .

开花14～23d，胚珠中可见合子、2-细胞原胚、T-形原胚、多细胞原胚、小球胚及扩散至珠孔端的胚乳核。

The fertilization and development of egg cells in the large embryo sac might be the main cause of the formation of the so called " mid-seated embryo " ( the embryo far from the micropyle end ) .

大胚囊中的卵细胞受精发育可能是形成所谓中位胚（远离珠孔端胚）的主要原因。

The growth rate of pollen tubes varied widely with the position of gynecium . The pollen tubes grew fast in the stigma canal and style canal , but slow in the obturator and micropyle .

花粉管通过柱头沟和花柱道时生长快，通过珠孔塞和珠孔以及珠柄时生长缓慢。

The developmental morphology of the obturator and micropyle and the pathway of the pollen tubes in the ovarian locule in Phellodendron amurense Rupr . have been investigated by scanning electron microscopy and light microscopy .

利用扫描电子显微镜术和光学显微镜术研究了黄檗（PhellodendronamurenseRupr.）的珠孔塞和珠孔的形态发育和花粉管在雌蕊中的路径。

With the megasporocyte developing , a bigger vacuole appears in the micropyle end , then it migrating toward the chalazal end with the nucleus in the micropyle end , ringed ER disappears in this phase .

大孢子母细胞继续生长，先在珠孔端出现一个较大的液泡，液泡随后移向合点端，细胞核移至珠孔端，此时环状内质网消失；

Owing to the degeneration of the nucellus at the micropyle pole during megagametogenesis , the egg apparatus pole of the mature embryo sac directly contacts with the integument and more or less penetrates into the micropyle .

在胚囊发育过程中珠孔端的珠心组织退化，故成熟胶囊的卵器端直接与珠被和珠孔相接。

Before and after pollination , calcium was more abundant in the exostome and endostome as compared with the other regions of the integuments , and was concentrated at the apoplast system , i.e. the intercellular matrix of the micropyle canal and the cell wall .

结果显示，授粉前后内、外珠孔处钙沉淀明显较珠被其它部位为多，钙主要分布在细胞壁和胞间基质等质外体系统中。

The pistil was composed of five carpels , stigmas and styli separated , the ovary was coadnate , basal placenta , it had only one circinotropous ovule , the ovule was crassinucellate and had two layers of integument , the micropyle was formed by the inner integument .

雌蕊由5心皮组成，柱头、花柱分离，子房合生，1室，基生胎座，胚珠1个，拳卷型，双珠被，厚珠心，珠孔由内珠被形成。