全 文 ：书西北植物学报!
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基金项目$上海市教委重点项目"
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作者简介$杨耐英"
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通信作者$曹建国!副教授!主要从事蕨类植物生物学研究&
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华东安蕨卵发生的超微结构观察
杨耐英!戴锡玲!王全喜!曹建国"
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摘
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要$核心薄囊蕨是蕨类植物中的进化类群!但对受精作用具有显著影响的卵发生研究仍较少!该文利用超微技
术对其中蹄盖蕨科的华东安蕨卵发生过程进行了研究!以进一步完善薄囊蕨植物卵发生的科学资料!为理解蕨类
植物的有性生殖及演化机制奠定基础&超微结构观察显示$华东安蕨的幼卵和沟细胞在颈卵器中紧密联接%随后!
在卵细胞上方出现了分离腔和临时细胞壁!但在卵细胞中间孔区处卵细胞和腹沟细胞始终联接在一起%分离腔中
的无定形物质沉积在卵细胞的质膜外形成了
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层加厚的卵膜!而在孔区处没有形成卵膜!该位置最后形成了受精
孔&在进一步的卵发生过程中!卵细胞核变得高度不规则!形成了大量的核外突和核褶皱&
关键词$华东安蕨%卵发生%卵膜%受精孔%超微结构
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