单词大孢子的汉英翻译
大孢子
[dà bāo zǐ]
- 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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