采用常规石蜡切片法和无色指甲油印痕法对北细辛及其近缘植物叶片解剖结构进行比较研究。结果表明，北细辛及其近缘植物在叶片表皮细胞大小及排列方式、栅栏组织、叶肉细胞形态及排列方式和叶片表皮气孔密度等方面存在差异。北细辛叶片栅栏组织由1层柱状细胞组成；汉城细辛和华细辛叶片栅栏组织均由2层柱状细胞组成；尾花细辛和花叶尾花细辛叶片栅栏组织由1层柱状细胞组成，但其细胞较小且排列疏松；青城细辛、川滇细辛和长毛细辛栅栏组织分化不明显。北细辛、汉城细辛和华细辛叶肉细胞叶绿体小而密，青城细辛和长毛细辛叶肉细胞叶绿体较大，川滇细辛和尾花细辛叶肉细胞叶绿体较小，青城细辛、长毛细辛、川滇细辛和花叶尾花细辛叶肉细胞叶绿体数量较少且主要分布于叶肉组织上层细胞，叶肉细胞中叶绿体间的差异也可为细辛属植物分类鉴别提供参考。%Leaf microstructure of Asarum heterotropoides Fr .Schmidt var .mandshuricum and its relative species were studied using paraffin method and colorless nail polish imprint method .The results showed that the leaf microstructure of A .heterotropoides var .mandshuricum and its relative species had a difference in the epidermal cell size and arrangement ,palisade tissue ,mesophyll cell morphology and arrangement ,and the leaf stoma density .Leaf palisade tissues of A .heterotropoides var .mandshuricum were composed of a layer of columnar cells ,but A .sieboldii Miq f .seoulense and A .sieboldii Miq were composed of two layers of columnar cells .Leaf palisade tissues of A .caudigerum Hance var .caudi-gerum and A .caudigerum Hance var .cardiophyllum were composed of a layer of columnar cells which were small and loose .A .splendens ,A . delavayi and A .pulchellum had no significant difference of palisade tissue .Chloroplasts in mesophyll cells of A .heterotropoides var .mand-shuricum ,A .sieboldii f .seoulense and A .sieboldii were small and dense ,but chloroplasts in mesophyll cells of A .splendens and A .pulchellum were larger .Chloroplasts of mesophyll cells in A .caudigerum var .cardiophyllum distributed in upper mesophyll cells mainly .Leaf anatomical structures can be as classification and identification reference for Asarum .
展开▼
