单词大孢子的汉英翻译

大孢子

megaspore; macrospore; megalospore; macroispore; gynospore

单词大孢子的英汉对照例句

报道苏铁植物大孢子叶化石一新属--中间苏铁属（mediocycasgen。nov。）

A new genus mediocycas gen.nov. of fossil cycad megasporophylls is reported.

大孢子两种孢子中较大的一种，会产生雌性配子体

The larger of two types of spores that give rise to a female gametophyte.

番木瓜的大孢子发生与胚囊发育。

Genesis of megaspore and development of embryo sac in carica papaya l.

极核经由双重授精之结果大孢子受精后的衍生细胞。

The central nucleus in the result of double fertilization.

受精前的大孢子囊细胞。

The megasporangium cells before fertilization.

珠心胚珠的中心，胚芽囊在此发育；大孢子囊

The central portion of an ovule in which the embryo sac develops; the megasporangium.

该配子体是由大孢子母细胞进行减数分裂而来。

The gametophyte is derived from the product of a reduction division in the megaspore mother cell.

接合孢子由相似的配子结合而成的多核大孢子，如在海藻或真菌中

A large multinucleate spore formed by union of similar gametes as in algae or fungi.

胚胎学观察揭示大孢子与胚囊内的卵细胞、助细胞和反足细胞均有可能在培养中启动分裂，通过胚状体或愈伤组织形成单倍体植株。

Embryological studies reveal that megaspore and such cells as egg synergid and antipodals in mature embryo sac initiate the division of forming haploid plants through embryogenesis or callus formation.

石松和楔叶类只形成一种类型的球果，然而裸子植物既有雌性的大孢子叶球也有雄性的小孢子叶球。

In the clubmosses and horsetails only one type of strobilus is formed while in the gymnosperms female megastrobili and male microstrobili both develop.

心皮是由大孢子叶两边愈合进化而来的。

It has evolved by fusion of the two edges of the megasporophyll.

在异型孢子体种类中，可区分为大孢子母细胞和小孢子母细胞。

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

造孢细胞，大孢子母细胞和四分体时期，周缘细胞仅1层。

There is only one layer of parietal cells at the stage of sporogenous cell megaspore mother cell and tetrad.

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