东北豆科山羊豆族4属植物叶形态特征及数量分类学研究

doi:10.11686/cyxb20150522

摘要/Abstract

摘要： 本研究采用GMA切片、扫描电镜及叶片透明法,深入研究了东北豆科山羊豆族4属25种植物叶的形态结构。选取与叶相关的23个形态性状,参考8个非叶的特征,进行了聚类分析与主成分分析。结果表明,相似系数在0.58处时,4属植物被分为3组,黄耆属与米口袋属为一组,棘豆属和甘草属各自为一组。小叶是否具腺体、叶柄横切面形状及叶柄细胞是否具单宁等特征具有较高的绝对权重值,可以作为区分刺果甘草与甘草和其他山羊豆族植物的依据。托叶质地、托叶与叶柄联合程度及小叶叶缘是否反卷等特征可作为棘豆属的识别特征。托叶形状在属下种间具一定的分类学价值。本研究为山羊豆族植物分类学及豆科植物系统学研究提供了叶形态学依据。

Abstract: The leaf morphological structure of 25 species,representing 4 genera from the tribe Galegeae, northeastern China, was determined using GMA, SEM and leaf transparency methods. Twenty-three morphological features related to leaf and 8 non-leaf characters were selected for cluster analysis and principal component analysis. Three groups were identified; Astragalus and Gueldenstaedtia were placed in one group, and Glycyrrhiza and Oxytropis in separate groups. Features including the presence of glands, petiole shape and tannin content of petiole cells were able to distinguish Glycyrrhiza pallidiflora and G. uralensis from other Galegeae species. Stipule texture, connectivity between stipule and petiole and leaflet margin features are all useful identification characteristics of Oxytropis. Stipule shape is valuable for interspecific classification. This study provided the leaf morphological evidences for taxonomy of the Galegeae and Leguminosae systematics.

史传奇, 刘玫, 王臣. 东北豆科山羊豆族4属植物叶形态特征及数量分类学研究[J]. 草业学报, 2015, 24(5): 182-189.

SHI Chuan-Qi, LIU Mei, WANG Chen. Leaf morphology and numerical taxonomy of 4 genera of the tribe Galegeae in northeastern China[J]. Acta Prataculturae Sinica, 2015, 24(5): 182-189.

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