青冈复合群叶表皮形态差异比较
毕业论文关键词： 青冈复合群；分类学；形态解剖；叶表皮
Leaf epidermis features variation of Quercus glauca complex
Abstract: Quercus glauca complex is widely located in the East Asian evergreen broad-leaved forest, this species is important to build regional forest ecosystems in maintaining tropical and subtropical evergreen broad-leaved forest ecosystem plays an important role. Micro-morphology of leaf anatomical characteristics and leaf structure have long been widely used in phylogenetic study of the genus Quercus. However, the study focused on Quercus subgenus plants, coverage of subgenus Quercus glauca leaf epidermis was relatively small. This study observed by optical microscopy, for eight kinds of distribution in southern China on leaf epidermis stoma, 73 inpiduals leaf epidermal morphology of 15 Quercus glauca were observed populations and differences in comparison analysis trichome and cell wall features in the classification systems, such as learning the meaning of preliminary discussions had been held. The study found: Q. stewardiana and Q. oxyodon are significantly different from other species. In the observed samples, papillae was observed only in Q. stewardiana. And simple-stellate was only observed in Q. oxyodon. And these two features are unique to Q. stewardiana and Q. oxyodon. Different species of Quercus glauca are different in hair types, hair density, pore size and pore density. One species Quercus glauca among different populations are different in leaf epidermal characteristics, but this difference is not significant. In addition, the difference of stomata and trichome density reveals that altitude and climatic factors have an important impact on these microscopic characteristics of leaf epidermis.
Keywords: Quercus glauca complex; Taxonomy; Morphological anatomy; Leaf epidermis
目录
摘要 I
Abstract II
目录 III
1 绪论 1
1.1 青冈亚属植物概述 1
1.1.1 青冈亚属植物的分类 1
1.1.2 青冈属植物的生态习性 1
1.2 青冈属植物在国内的研究和应用情况 2
1.3 研究目的和意义 2
1.4 本研究涉及的青冈亚属植物的形态学及产地分布资料 2
1.4.1 滇青冈 Quercus schottkyana 2
1.4.2 褐叶青冈 Q. stewardiana 3