橘子朗文词典

megaspore

M 开头单词

基本解释

  • n.[植]大孢子；(种子植物的)胚囊

同根派生

     

英汉例句

    双语例句

  • Megaspore tetrad is linear. The chalazal megaspore develops into an embryo sac of Polygonum type.
    大孢子四分体为线形， 合点端功能大孢子发育成为蓼型胚囊。
  • In theterosporous species, a distinction is usually made between megaspore mother cells and microspore mother cells.
    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。
    plb.snnu.edu.cn
  • A single archesporium differentiates immediately below the nucellar epidermis, it functions directly the megaspore mother cell.
    孢原细胞处于珠心表皮之下， 直接起大孢子母细胞的功能。

词组短语

    短语

  • Megaspore formation 大孢子形成
  • megaspore leaf 大孢子叶
  • megaspore nucleic 释义大孢子核;大孢子核
  • gastrula megaspore 胚囊
  • megaspore tetrad 四分大孢子

英英字典

    柯林斯英英字典

  • the larger of the two types of spore produced by some spore-bearing plants, which develops into the female gametophyte (Also called macrospore)&rarrcomparemicrospore

专业释义

    农业科学

  • 大孢子

    Two hours after pollination, the third mitosis of megaspore completes in CK of BP; treated with CPPU, there is 17.65% mature embryo sac in ovary.
    授粉后2h，蕾期授粉的对照已经完成大孢子的第三次有丝分裂；经CPPU处理后，17.65％的胚囊发育成熟；花期授粉的对照中有80.00％的胚囊的极核相互靠近，处理中25.00％的胚囊开始了极核的融合。

    生物学

  • 大孢子

    • 地球科学

  • 大孢子