megaspore

美 ['meg??spo?r] 　英 ['meg?sp??]

• n.【植】大孢子
• 網(wǎng)絡(luò)大胞子；大孢子內(nèi)

詞形變化

復(fù)數(shù)：megaspores  

英漢解釋

n.

1. 【植】大孢子

英英解釋

n.	1. the larger of two kinds of spore produced by seed plants and some ferns, which develops into a female gametophyte.

例句

In theterosporous species, a distinction is usually made between megaspore mother cells and microspore mother cells.

在異型孢子體種類中，可區(qū)分為大孢子母細(xì)胞和小孢子母細(xì)胞。

Of the four products of a megaspore mother cell, three usually abort.

在大孢子母細(xì)胞分裂產(chǎn)生的四個(gè)孢子中，三個(gè)會(huì)解體消失。

The megaspore mother cell meiosis to form a linear megaspore tetrad.

大孢子母細(xì)胞減數(shù)分裂產(chǎn)生直線形大孢子四分體。

In the gymnosperms the megaspore gives rise to a cell that is termed the embryo sac because of its similarity to the angiosperm structure.

在裸子植物中，大孢子也產(chǎn)生一個(gè)細(xì)胞，因?yàn)?/c>它類似于被子植物的胚囊細(xì)胞，故也可以稱之為胚囊。

Genesis of megaspore and development of embryo sac in Carica papaya L .

番木瓜的大孢子發(fā)生與胚囊發(fā)育。