megaspore
大孢子
常用释义
英音[ ˈmeɡəˌspɔː ]
美音[ ˈmeɡəˌspɔːr ]
基本释义
- n. 大孢子；（种子植物的）胚囊
例句
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1·This shows a synchronous development of megaspore and pollen chamber.反映大孢子发育和贮粉室发生的同步性。
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2·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。
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3·Arrangement of megaspore is linear shaped, the megaspore of chalazal end is functional megaspore.大孢子排列为直线型，合点端大孢子为功能大孢子。
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4·As development goes on, callose fluorescence disappears in the chalazal wall of diplosporous functional megaspore .二倍体功能大孢子的合点端细胞壁内的胼胝质荧光消失。
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5·Development of megaspore and formation of embryo sac: the ovule has a layer of parietal cells at the sporogenous stage.大孢子的发育及胚囊的形成：造孢时期，造孢细胞发育成大孢子母细胞。
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6·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。
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7·Megaspore tetrad is linear. the chalazal megaspore develops into an embryo sac of polygonum type. Hypostase and special integument tapetum exist in the ovule.大胞子四分体线形排列，合点端大孢子为功能大孢子，胚囊发育类型为蓼型，具有特化的珠被绒毡层和承珠盘。
同义词
n.
[植]大孢子；（种子植物的）胚囊