蔷薇科5种植物叶表皮微形态特征研究

Leaf epidermal micro-morphology characteristics of five plants in Rosaceae

在光学显微镜下,对蔷薇科3属5种植物,即垂丝海棠、七里香、多花蔷薇、黄刺玫、伞花蔷薇的叶表皮微形态特征进行观察和研究,并测定相应的数量指标。结果表明,5种蔷薇科植物叶表皮形态较为一致:上表皮几乎全为多边形,垂周壁平直或浅波状;下表皮多为无规则型,垂周壁平直或浅波状;气孔器均分布在下表皮,均为无规则型。但表皮细胞垂周壁式样、气孔长短轴之比及气孔器指数等细微特征在种间存在差异,可以区分种类。因此,叶表皮特征对于蔷薇科种类的划分和亲缘关系的确定具有一定的分类学意义。

As seen under an optical microscope, the experiment conducted an observation and a study on micro-morphological char- acters of leaf epidermis of five species in three genera, namely Malus halliana, Rosa banksiae Ait, Rosa multiflora Thunb, Rosa xan- thina, Rose maximowicziana. And some quantity indices were measured by analysis system of microphotograph. The results revealed that the epidermal structure of the five Rosaceae speeies is the same type： almost adaxial epidermis are polygonal shapes and their anticlinal walls are mainly fiat or shallow wavy. Abaxial epidermises are irregular and their anticlinal wails are mainly fiat or shallow wavy. Stomatal apparatus distribute around the outer epidermis, being random. But the types of anticlinal wall , the proportionment of length to width of stomatal aperture and the index of stomatal apparatus eet. are different among species. Therefore, leaf epidermal morphology may verify the systematic relationships and classification of Rosaceae.