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珠孔

网络micropyle; micropyle or foramen

珠孔

珠孔

micropyle

花粉管会从胚珠上的珠孔（micropyle）进入，穿入肋细胞之一，然后爆开，放出精细胞，其中一颗与卵子结合成为受精卵（或 …

micropyle or foramen

...,脐即为其所遗留的痕迹,如大豆般).胚珠的开孔称为珠孔(micropyle or foramen).胚珠的主体称为珠心(nucellus).一般胚珠均由 …

1

Synergid cells Two haploid cells located near the egg cell at the micropylar end of the embryo sac in flowering plants .

存在于开花植物胚囊内，是位于珠孔端的卵细胞两侧的两个单倍体细胞。

2

After fertilization through the micropyle, the zygote turned into dormancy status without certain time phase .

成熟胚囊经珠孔受精后，合子休眠，休眠时间不确定。

3

When the embryo differentiated cotyledons , the haustorium cells gradually degenerated , then disappear.

胚分化出子叶时，胚乳吸器自合点端向珠孔端退化。

4

In third stage , at maturing of the embryo sac, pollen tubes grow directionally toward micropyle into embryo sac .

朝珠孔定向生长阶段，胚囊成熟时，花粉管朝珠孔定向生长进入胚囊。

5

Porogamy The usual method of fertilization in angiosperms in which the pollen tube enters the ovule by the micropyle. Compare chalazogamy.

被子植物通常的受精方式。花粉管通过珠孔进入胚珠。比较。

6

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。

7

Seeds ellipsoid, glabrous, nearly without endosperm, with thickened tissue at micropylar end .

种子椭圆形，无毛，近无胚乳，在珠孔端具加厚组织。

8

micropyle formed by inner integument or by both integuments.

珠孔由内珠被或者两层珠被形成。

9

There the sperm must find and swim through an opening at one end of the egg , the micropyle.

精子必须寻找到卵，并从一端的珠孔（micropyle ）游入其中。

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