【摘要】 借助显微和扫描电镜技术对石蒜属植物叶表皮微形态特征进行了研究.利用光学显微镜和扫描电子显微镜观察了石蒜属植物的叶表皮,统计并测量了气孔类型、气孔大小、气孔密度及气孔指数等,描述了气孔及气孔外拱盖的有关特征.结果表明:石蒜属植物叶表皮气孔器为无规则型,近轴面表皮细胞形状、气孔器类型、垂周壁式样、气孔大小及气孔外拱盖内缘种间无差异或极小,表明石蒜属植物为一自然分类群.而远轴面表皮细胞形状、气孔密度、气孔指数、气孔是否下陷、气孔外拱盖是否有蜡质纹饰等种间差异较大.根据远轴面叶表皮细胞形状及叶气孔特征,研究表明:换锦花、长筒石蒜和安徽石蒜,夏水仙、乳白石蒜与红蓝石蒜,石蒜与中国石蒜具有较近的亲缘关系.因此,叶微形态特征对探讨石蒜属植物种间亲缘关系具有一定的意义.更多还原

【Abstract】 The micro-morphological characteristics of foliar epidermis of eleven species of Lycoris were studied with LM and SEM. The stomatal type, stomatal size, stomatal density and stomatal index were measured and counted with LM. With SEM, concerned characteristics such as the shape of inner margin of outer stomatal ledge and outer stomatal ledge were described. The results showed that the type of stomatal apparatus in Lycoris was irregular. The characters, such as the shape of adaxial epidermis cells, the type of stomatal apparatus, the pattern of anticlinal walls, the size of stomata and inner margin of outer stomatal ledge were not different between species of Lycoris. It was indicated that Lycoris was a natural group. However the variety of abaxial epidermis cells shape was big, which had rectangle, long rectangle, shuttle and polygonal form. The obvious difference between species with SEM were in two ways: the first was that whether stomata was sunken or not; second was that whether outer stomata ledge had wax ornamentation or not. According to the shape of abaxial cells and characteristics of stomata, the close relationship were between L. sprengeri, L. longituba and L. anhuiensis. The close relationship between L. ×squamigera, L. × albiflora and L. ×haywardii and, L. radiata and L.chinensis was also approved. So the leaf micro-morphological characteristics had important effect on identifying the inter-species relationship of Lycoris, and which was also in favor of distinguishing miscible species in Lycoris.更多还原