内蒙古产委陵菜属植物叶解剖特征的比较研究

Study on the Leaf Anatomical Characteristics of Genus Potentilla Plants in Inner Mongolia

以内蒙古地区委陵菜属14个种3个变种为材料,制作石蜡切片,对其叶片解剖结构进行比较研究,以了解其叶片结构差异.结果表明:委陵菜属植物叶片均为异面叶,栅栏组织1-3层,只在近上表皮分布,但二裂委陵菜较特殊;上、下表皮均由单层细胞构成,上表皮细胞排列紧密且厚度明显大于下表皮;气孔在上、下表皮均有分布,但主要分布于下表皮;叶表皮均被表皮毛,且毛被类型多样;部分特征反映出委陵菜属植物对其生境的适应.

With the paraffin section method,the leaf anatomical characteristics of 14 species and3varieties of genus Potentillafrom Inner Mongolia area were compared to reveal the leaf structure differences.The results showed that the leaves of all kinds of species were bifacial,which had 1-3layers palisade tissue that distributed on the upper epidermis,except P.bifurca.The upper and lower epidermis were composed of monolayer cells.However,the cells in upper epidermis had a tight arrangement pattern and they were thicker than the lower ones.Stomata distributed on the upper and lower epidermis but more on the later.All plants had multiple types of epidermal hair.These leaf characteristics demonstrated that these genus Potentilla plants had a well adaptation to their habitat.