南京林业大学学报(自然科学版) ›› 2004, Vol. 28 ›› Issue (04): 54-58.doi: 10.3969/j.jssn.1000-2006.2004.04.013

• 研究论文 • 上一篇    下一篇

中国木犀属叶部微形态特征及其在系统分类中的应用

季春峰;向其柏;徐柏森   

  1. 南京林业大学森林资源与环境学院;江苏南京210037;南京林业大学森林资源与环境学院;江苏南京210037;南京林业大学森林资源与环境学院;江苏南京210037
  • 出版日期:2004-08-18 发布日期:2004-08-18

Characters of Leaf Micromorphology of the Genus Osmanthus(Oleaceae) and Its Application in Systematic Taxonomy

JI Chun-feng,XIANG Qi-bai~*,XU Bai-sen   

  1. College of Forest Resources and Environmont Nanjing Forestry University Nanjing,Jiangsu 210037,China
  • Online:2004-08-18 Published:2004-08-18

摘要: <正>应用扫描电子显微镜 (SEM)观察了木犀科Oleaceae木犀属Osmanthus国产 15种植物的叶部微形态特征。结果表明 ,该属植物气孔多为圆形或椭圆形 ,排列一般规则而整齐 ;气孔口多呈椭圆形 ;气孔外缘具明显的突起 ,有时呈复杂的缠绕绳索状 ;多具有腺点 ,腺点外常具有明显的放射状条纹。气孔密度各种之间差别较大 ,为 4 0 0~ 170 0个 /mm2 。腺点密度则差别较小 ,为 6 9~ 136个 /mm2 。山桂花、双瓣木犀、坛花木犀具有一种特殊类型的气孔 ,气孔外缘具有明显的放射状条纹 ,与腺点较为接近 ,远大于正常气孔 ,密度为 39~14 6个 /mm2 。给出了该属基于微形态特征的分种检索表。总体而言 ,微形态研究结果支持了传统上将该属分为 4组的处理方式 ,但各组之间在一些性状上也存在交叉。因此 ,进一步开展此类的研究工作 ,继续探讨微形态特征在该属分类方面的价值是非常必要的

Abstract: The paper discusses leaf micromorphology of 15 species in the genus Osmanthus(Oleaceae) with Scanning Electron Microscope(SEM).The results are as follows:Stomatas of the genus are usually round or elliptical and well organized.Their outer layers mostly have marked margins.In some species,the margins are so complicated that they look like twining ropes.Most species have glands.The outer layers of the glands usually have radiate stripes.The stomata density is 400~1 700 per mm~2,while the gland density is 69~(136 per mm~2).In the following 3 species,O.delavayi,O.didymopetalus,O.urceolatus,there is a particular type of stomata,which is similar to gland.Their densities are 39~146 per mm~2.A key to the 15 species based on the micromorphology characters is given in this paper.On the whole,the results are in accordance with those of traditional taxonomy.However,some crossing conditions have occurred among different groups,so the author belive that it is quite necessary to make further investigation to the genus in order to make sure the usefulness of micromorphology to the taxonomy work.

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