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单词 megaspore
释义

megaspore /'megəspɔː//'mɛgə,spor/

英汉-汉英词典
n. 大孢子,(种子植物的)胚囊
词组 | 习惯用语
您要查找的是不是：
  • spore n. 孢子 vi. 长孢子
  • angiosperm n. 被子植物
  • Singapore n. 新加坡
megaspore n. 大孢子；（种子植物的）胚囊

网络短语:
surviving megaspore 存活胚囊
megaspore membrane 大孢子壁
megaspore competition 大孢子竞争
megaspore nucleic 释义大孢子核; 大孢子核;
gastrula megaspore 胚囊
microspore megaspore 大小孢子
Megaspore formation 大孢子形成
megaspore leaf 大孢子叶
megaspore germination 大孢子萌发
megaspore haustorium 大孢子吸器
英语例句库
  1. Simple ovary, the placentation is brink.The ovules are campylotropous.The ovule is bitegmic and crassinucellate.The megaspore archesporium is initiated from sub-epidermis of nucellus.
    摘要矮沙冬青子房单心皮1室，边缘胎座，弯生胚珠，胚珠具双珠被、厚珠心。

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英语百科

Megaspore

Microscopic photo of spores (in red) of Selaginella. The large three spores at the top are megaspores whereas the numerous smaller red spores at the bottom are microspores.
Plant ovules with megasporocytes before meiosis: Gymnosperm ovule on left, angiosperm ovule (inside ovary) on right

Megaspores, also called macrospores, are a type of spore that is present in heterosporous plants. These plants have two spore types, megaspores and microspores. Generally speaking, the megaspore, or large spore, germinates into a female gametophyte, which produces egg cells. These are fertilized by sperm produced by the male gametophyte developing from the microspore. Heterosporous plants include the following:

近义、反义、联想词
近义词
n.
spore

联想词
ovary子房;embryo胚胎;taxon分类单元;cytoplasm细胞质;apical顶上的, 顶点的;clade分化枝;
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更新时间：2025/6/17 8:00:44