构树叶表皮毛的结构特征及钙离子铵离子吸收测试
毕业论文关键词：构树；表皮毛；密度；滞水；离子吸收
The role of plant leaf table fur
Abstract: Plant leaf epidermal hair on the leaf is a special kind of structure, it is composed of leaf epidermal cells specialized to form. This research mainly aimed at leaf epidermal hair of Broussonetia papyrifera, and use of a cross-section of the leaf epidermal hair of Broussonetia papyrifera was observed under an optical microscope and directly observed leaf epidermal hair of Broussonetia papyrifera on the dissecting microscope, the study found leaf epidermal hair of Broussonetia papyrifera has some features: All the leaf epidermal hair of Broussonetia papyrifera are unicellular, most hair follicles, embedded in the epidermis, hair follicle no small part; leaf epidermal hair of Broussonetia papyrifera on the upper epidermis than the lower epidermis sparse and relatively short sturdy, needle shape and the cone shape, and large follicles and mature needles table fur around a small circle of unicellular hairs, veins also epidermal hair is sparse; leaf lower epidermis hair is on the upper epidermis is thicker, most of the epidermis hair is acicular, some mature epidermis hair is in a hook shape and veins also have epidermis hair, main veins than in small veins sparse. Relative with epidermal, projections of epidermal hair surface area and epidermal hair have different shapes of structure, there is greater attachment area, through the experiment that, the leaf epidermis hair of Broussonetia papyrifera have good backwater effect. The observation shows that the upper and lower sides leaf epidermal hair of Broussonetia papyrifera have many epidermal hair, calculated on epidermal density than the epidermis of low density. Leaf epidermal hair of Broussonetia papyrifera by ion absorption experiments with calcium and ammonium ions, and the results show leaf epidermal hair of Broussonetia papyrifera can absorb calcium and ammonium ions, with the ability to absorb ions.
Key words: Broussonetia papyrifera; Leaf epidermal hair; Density; The degree of stagnant water; Ion absorption
目录
引言 5
表皮毛的概述 5
表皮毛的结构特征 5
表皮毛的研究现状 5
本课题研究及其意义 6
1材料与方法 7
1.1材料 7
1.2方法 7
1.2.1构树叶表皮毛切片制作结构观察 7
1.2.2构树叶表皮毛密度测量 7
1.2.3构树叶表皮毛离子吸收实验 7
1.2.4构树叶滞水实验 7
2结果及分析 8