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作 者 ：周毅;黄衡宇;*;李菁;

期 刊 ：植物研究 2010年 30卷 2期 页码：157-163

关键词：蛇足石杉；湘西地区；茎叶解剖特征；

Keywords:Huperzia serrata, Xiangxi Region, anatomical characterstics of leaf and stem, ecological adaptation,

摘 要 ：利用解剖学方法对湘西地区蛇足石杉5个野生居群个体（S1,S2,S3,S4,S5）的茎叶进行了解剖学比较和分析，结果表明：不同居群蛇足石杉解剖结构的性状存在明显的差异性，其中维管柱厚度、皮层厚度、海绵组织厚度、叶片厚度这4个性状是造成居群间蛇足石杉解剖学性状差异的主要因子；茎叶解剖结构也表现出对阴湿环境适应的的形态特征，但是，S1居群的蛇足石杉具有适应旱生生境的趋势。这些解剖学性状除受遗传因子控制外，环境因子（主要为光照和水分）起着重要的作用，因此，蛇足石杉形态解剖学上的差异性或可塑性是其赖以适应环境和生存的基础。

Abstract:By using the method of anatomy, we compared and analyzed the anatomical characterstics of the leaf and stem of five wild populations of Huperzia serrata in Xiangxi Region. The results showed that H.serrata populations have obvious differences in anatomical characterstics. Among all anatomical characterstics, vascular cylinder thickness, cortex thickness, spongy tissue thickness, and leaf thickness are the main factors which contribute to the differences of anatomical characterstics of H.serrata populations; The anatomical characterstics of stem and leaf are morphologically adaptive to damp environment, but among all populations, H.serrata in S1 population have the tendency of adapting dry environment. These morphological characterstics are mainly controlled by genetic factors, but environmental factors(mainly light and water) also have important influence on them. Therefore, the anotomical difference and plasticity of H.serrata populations are essential for the adaptation and the existance of H.serrata.

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