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槲蕨配子体形态发育研究

Journal of Tropical and Subtropical Botany(2009)

Cited 23|Views8
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Abstract
用无机培养基和土壤培养基分别培养槲蕨(Drynaria roosii Nakaike)孢子,显微镜下观察孢子萌发及配子体形态发育过程。结果表明:孢子黄色,具单裂缝,赤道面观豆形,极面观椭圆形,不具周壁,孢子外壁局部具大小不一的颗粒状纹饰。接种后10~12d孢子萌发,萌发类型为书带蕨型,原叶体发育为槲蕨型。接种后20d左右发育为片状体,片状体形成顶端细胞的时间较晚。毛状体出现在片状体形成之后,数量丰富,多为单细胞,分布于原叶体背腹面及边缘。接种后60d左右发育形成幼原叶体,成熟原叶体呈心脏形。接种后65d左右开始有性器官出现,精子器的出现较颈卵器早10d左右。颈卵器成熟后,颈部常向原叶体基部倾斜或弯曲。原叶体受精后幼胚突破颈卵器生长。
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Key words
gametophyte development,drynaria roosii nakaike,spore germination,spores
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