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德保苏铁茎的解剖学研究
文祥凤;和太平;徐峰
1.广西大学林学院;2.广西大学林学院 广西南宁530001;3.广西南宁530001
摘要:
对德保苏铁茎、叶柄的解剖构造进行观察,结果表明:(1)德保苏铁的茎由周皮、皮层、维管束、髓四部分构成。木栓层的细胞壁完全栓化;皮层大而显著,皮层细胞一般较小,富含淀粉,分布有粘液道;维管束通常较小,主要集中在皮层和髓之间的狭窄区,排列呈环形,具2生长环;少部分稀疏地散生在皮层薄壁细胞之间。(2)叶柄由表皮、绿皮层、下皮层、基本组织、维管束、髓组成。表皮细胞1层,细胞外壁角质化;绿皮细胞2层,有叶绿体;下皮层的厚壁细胞,大小不一,细胞壁强烈增厚;维管束散生,属外韧维管束,排列呈环形,内有零星分布的维管束。
关键词:  德保苏铁    解剖构造    茎    叶柄
DOI:
分类号:
Fund project:国家自然科学基金资助项目(30260007)
Abstract:
Key words:  
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