megaspore

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