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作 者 ：孙　阎;张欣欣;王　臣*;刘　玫;刘鸣远

期 刊 ：植物研究 2007年 27卷 4期 页码：412-415

关键词：芡；睡莲；萍蓬草；胚；胚乳；外胚乳；

Keywords:Euryale ferox, Nymphaea tetragona, Nuphar pumilum, embryo, endosperm, perisperm,

摘 要 ：研究了中国睡莲科的3属3种即芡（Euryale ferox Salisb.）、睡莲（Nymphaea tetragona Georgi）和萍蓬草（Nuphar pumilum (Hoffm.) DC.）的胚、胚乳及外胚乳。它们的胚的共同特点是苗端发育良好，特别是胚芽具2～4枚胚芽叶，而根端滞育。三个种皆既有胚乳，又有外胚乳，但在成熟种子中作为胚的营养组织则胚乳弱育而外胚乳发达。最后对上述特点在系统发生中的意义进行了讨论。

Abstract:The embryo,endosperm and perisperm in 3 species, Euryale ferox Salisb.Nymphaea tetragona Geargi and Nuphar pumilum DC. of Nymphaeaceae were Studied in this paper.The common characters of embryo are the well developed shoot apex,especial the plumule with 2~4 plumular leaves,and the diapausing root apex. All of the 3 species have both endosperm and perisparm ,but the former only remains and the latter is very rich in the mature seeds.Finally,the meaning of these characters in phylogeny were discussed.

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