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原叶体

n.prothallus
网络prothallium; prothallium-prothallia; leaf primodia

原叶体

原叶体

英-汉网络释义

原叶体

n.

1.prothallus

1

Mature prothalli are cordate -shaped . Profuse unicellular hairs occur on the surface and margin of the prothalli.

原叶体边缘及表面均可产生毛状体，数量丰富，为单细胞。

2

the prothalli are saprophytic , irregularly branched , subterranean bodies .

原叶体是腐生的，不规则分枝的地下体。

3

In homosporous plants , there is only one type of prothallus with both male and female sex organs .

在具同形孢子的植物中，只有一种雌雄性器官兼备的原叶体类型。

4

true prothallus of ferns are mostly heart -shaped , green self-supporting, while others showed filamentous or ribbon .

真蕨类的原叶体多为心形，绿色自养，也有的呈丝状或带状。

6

Young embryos can be observed from prothalli about 2 weeks after fecundation .

精卵受精后 2 周左右即可观察到从原叶体上生成的幼胚。

7

It can be observed that the embryos break through the archegonia after fertilization .

原叶体受精后幼胚突破颈卵器生长。

8

Hairs can occur on both the surfaces and margin of the prothalli .

原叶体边缘及背腹面均可产生毛状体。

9

Young embryos can be observed from the prothalli 1 month after sowing.

原叶体受精后 1个月内即可观察到从原叶体上生成的幼胚。

10

In vascular plants the diploid sporophyte is the dominant phase and in the ferns , for example, the gametophyte is a small prothallus .

在维管植物（蕨类）中二倍体的孢子体占生活史的主要部分，配子体仅为原叶体。

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