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植物研究  2014 

多羽实蕨胚胎发育的研究

DOI: 10.7525/j.issn.1673-5102.2014.06.004, PP. 736-740

Keywords: 多羽实蕨,胚胎,发育

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Abstract:

?利用人工培养和石蜡切片法研究了多羽实蕨(Bolbitisangustipinna(Hayata)H.Ito)胚胎发育过程。合子第一次分裂面垂直于原叶体纵轴且平行于颈卵器颈部;第二次分裂面平行于原叶体纵轴且垂直于颈卵器颈部;第三次分裂面同时平行于原叶体纵轴和颈卵器颈部。经多次分裂形成球形胚胎,球形胚胎的外上和外下区域几乎同时分别发育出第一叶顶端细胞和第一根顶端细胞,继而分别斜向分裂产生第一叶原基和第一根原基。随后,第一叶原基迅速分裂,最早突破帽状体形成第一幼叶;第一根原基的分裂速度稍慢,晚于第一叶突破帽状体形成第一根。并讨论了胚胎发育的系统学问题。

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