megaspores

基本解釋

• 大孢子

同根派生

• megaspores相關(guān)詞

英漢例句

• Objective:The aim of this work is to probe into micromophological character of megaspores of Selaginella and their significance in taxonomy.
  目的:探討卷柏屬植物大孢子微形態(tài)學(xué)特征及其在植物分類(lèi)學(xué)和藥材鑒定學(xué)上的意義。
• The micropylar cell in a dyad always degenerated quickly and only chalazal one finished meiosis II to form two unequal-sized megaspores.
  合點(diǎn)端的二分體細(xì)胞中細(xì)胞器豐富，線(xiàn)粒體和質(zhì)體的形態(tài)正常，表明完成再分化。
• Results: Comparative studies on megaspores, especially ornamentation, of thirteen species in the genus of Selaginella that are first reported here.
  結(jié)果:發(fā)現(xiàn)大孢子囊在孢子囊穗上著生位置有一定的規(guī)律;首次報(bào)道13種卷柏的大孢子微形態(tài)特征,極為難得。
• Yet the megaspores have all kind of degenerated forms in all developmental phases, so it can' t form the embryo, this is the main reason of forming small putamen type.
  而大孢子在各個(gè)發(fā)育階段均會(huì)出現(xiàn)各種敗育現(xiàn)象，因此無(wú)法形成胚，這是產(chǎn)生焦核的主要原因。
• Thick callose deposits in the walls of degenerative megaspores, while little in the wall of functional megaspore.
  退化的大孢子細(xì)胞壁胼胝質(zhì)熒光明顯，功能大孢子細(xì)胞壁上缺少胼胝質(zhì)熒光。

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