【摘要】 利用光学显微镜(LM)和扫描电子显微镜(SEM)对内蒙古地区自然生境中生长的小叶锦鸡儿(Caragana microphylla Lam.)、中间锦鸡儿(C.davazamcii Sancz.)和柠条锦鸡儿(C.korshin-skii Kom)叶表皮微形态进行了观察,并测定了相应的数量指标。结果表明:所有材料的上下表皮细胞均为不规则形或多边形,垂周壁主要为平直或拱形,稀有浅波状;多数材料具鳞片状和层状蜡被;角质层多为条纹状;均有气孔器分布,类型多样,以不等细胞型和无规则型为主;气孔外拱盖多覆盖蜡被,内缘多光滑或浅波状;乳突只出现在小叶锦鸡儿和中间锦鸡儿,而柠条锦鸡儿没有出现。该研究表明,3种植物叶表皮微形态受遗传因子和环境条件共同作用,多数特征在属的水平上保持稳定,少数性状可以用作种分类的辅助指标;表皮微形态特征显示三者在生态适应对策上具有相似性,而在种间关系上可能中间锦鸡儿与小叶锦鸡儿的亲缘关系更近。更多还原

【Abstract】 The Leaf epidermis of Caragana microphylla Lam.,C.davazamcii Sancz.and C.korshinskii Kom that growing in the Inner Mongolia steppe were observed using light microscope(LM) and scanning electron microscope(SEM).Some index that is expressible as quantity was measured by analyses system of microphotograph.The results reveal that the epidermal cells on both adaxial and abaxial leaf surfaces are irregular or polygonal shapes,and their anticlinal walls are mainly straight-arched,scarcely sinuolate;The most epidermis cells are squamiform and have wax membane;Ornamentations of cuticular membrane are more striate.There are four types of stomatal aperture including anisocytic,anomocytic,paracytic and actinocytic distributed on epidermis,and the former two types are occupied mostly.Wax ornamentation has diverse patterns and covers the outer stomatal ledge(or rim).The inner margin of outer stomatal ledge(or rim) is smooth or sinuolate.These results suggested that the leaf epidermal micro-morphyological characters of C.microphylla,C.davazamcii and C.korshinskii are regulated by both the inherited and the environmental factors,most characters keep constant on genus level,whereas others which might offer the information to accessorial classification index are inconstant;The similarity of some morphological characters on ecological adaptive countermeasure were represented,whereas it is likely there is more conversant relationship between C.microphylla Lam and C.davazamcii Sancz.among the three species of Caragana.更多还原