摘要
利用光学显微镜对鳞毛蕨科6种鳞毛蕨属植物和2种耳蕨属植物叶表皮特征进行比较观察和分析.结果表明:8种蕨类植物的叶片表面无附属物;气孔器类型具多型现象,鳞毛蕨属植物气孔器类型主要为不等细胞型和极细胞型,耳蕨属植物气孔器类型多为无规则四细胞型;气孔均为下生型,不下陷,多沿叶脉方向排列,且叶脉间分布较密集;鳞毛蕨属植物气孔器较耳蕨属狭长,表皮细胞为不规则型,垂周壁呈波状或不规则凹凸状,而耳蕨属植物表皮细胞狭长,垂周壁为浅波状;6种鳞毛蕨气孔器指数总体上较耳蕨属大,而气孔器密度差异不大.由此得出结论,表皮的整体特征可以作为划分鳞毛蕨科植物的特征;可据细胞大小、气孔器大小与气孔器指数来区别鳞毛蕨属和耳蕨属植物,为鳞毛蕨属植物的分类鉴定提供了新的形态学依据.
An observation, comparison analysis on leaf epidermis characters of 6 species of genara Dryopteris and 2 species of genara Polystichum were studied with optical microscope. The results showed that there was no trichome on both upper and lower epidermis of leaves;the stomatal apparatus were poly morphic,genara Dryopteris were mostly polycytictype and aisocytictype ,while genara Polystichum were mostly anomotetracytictype;all the stomatal apparatuses occur in the lower epidermis, no cave, multi-align ment along the veins of leaf and intensive distribution between veins; the stomatas of genara Dryopteris were narrower and longer than genara were wavy or irregularly uneven while Dryopteris and anticlinal walls weree li Polystich epidermal ttle wavy; urn, their epidermal cells were irregular, anticlinal walls cells of genara Polystichum were narrower than ganara on the whole,the stomatal indexes of 6 species of genara Dryopteris were bigger than 2 species of genara Polystichum, while the stomatal density had no difference. The 8 species of Dryteridacea was suggested that we could the results provide new evide e were disting nces fo different uish two r mopho in the size of cell of leaf ep genaras by the size of cell dermis, and the size of stomatal. It stomatal, and stomatal index, and logical classification and identification for Dryteridaceae.
出处
《甘肃农业大学学报》
CAS
CSCD
北大核心
2013年第3期166-171,共6页
Journal of Gansu Agricultural University
基金
国家自然科学基金(30760040)
楚雄师范学院院级重点建设学科(05YJJSXK03)
关键词
鳞毛蕨科
叶
表皮细胞
气孔器
比较
分类
Dryteridaceae
leaf
epidermal cells
stomata
comparison
classification
