豆科15种植物叶片结构特征比较研究

发布时间：2018-03-13 21:28

本文选题：豆科　切入点：叶片特征　出处：《内蒙古农业大学》2017年硕士论文　论文类型：学位论文

【摘要】：运用石蜡切片技术和叶片解离技术对豆科15种植物的叶片特征进行研究,利用光学显微镜观察了 9属15种豆科植物的叶表皮及叶片解剖结构,统计并测量了表皮细胞形状、垂周壁式样、表皮细胞面积、气孔大小、气孔密度、气孔指数、表皮厚度、叶片厚度、叶肉厚度、栅栏组织厚度、海绵组织厚度等相关的特征,并分析了叶片特征在种属之间存在的异同。结果表明:9属15种植物的气孔在上下表皮均有分布,表皮细胞排列形式、气孔类型均为为不规则型,气孔形状为圆形-椭圆形。表皮气孔特征对植物分类有一定指示作用,且下表皮气孔密度与气孔指数较上表皮对应指标属内、属间稳定性更强。叶片解剖结构数据分析结果显示,各指标在属间、属内、种内均存在一定差异无法作为15种植物的分类依据。因此,植物的叶片特征是否可作为植物分类的辅助依据仍有待进一步研究。
[Abstract]:The leaf characteristics of 15 species of legumes were studied by using paraffin section and leaf dissociation techniques. The leaf epidermis and leaf anatomical structure of 15 species of legumes belonging to 9 genera were observed by optical microscope, and the shape of epidermal cells was measured. Vertical wall pattern, epidermal cell area, stomatal size, stomatal density, stomatal index, epidermal thickness, leaf thickness, mesophyll thickness, palisade tissue thickness, sponge tissue thickness, etc. The results showed that the stomata of 15 species of 9 genera were distributed in the upper and lower epidermis, the epidermal cells were arranged in the form of epidermal cells, and the stomatal types were irregular. The stomatal shape of the epidermis is round-ellipse. The stomatal characteristics of epidermis indicate the taxonomy of plants to some extent, and the stomatal density and stomatal index of lower epidermis are higher than those of the upper epidermis. The results of leaf anatomical data analysis showed that there were some differences among genera, genera and species, which could not be used as the taxonomic basis for 15 species of plants. Whether the leaf characteristics of plants can be used as an auxiliary basis for plant classification remains to be further studied.
【学位授予单位】：内蒙古农业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：Q944.56

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