构树叶表皮毛的结构和钾镁离子吸收
毕业论文关键词: 表皮毛 ; 桑科 ; 表皮毛 ;离子吸收 ；滞水量
Trichomes structure of the leaves and potassium and magnesium ion absorption
Abstract: Using an optical microscope structure structure of leaf trichomes observed structural characteristics of the leaves to get the type of fur and wool table and leaf trichomes were counted, to obtain the number of the leaves trichomes density; trichomes of the leaves were ion absorption test, trichomes of the leaves to determine whether there is an ion absorption capacity; spraying water on the structure of leaf experiment, stagnant water was measured to determine the structure of leaf trichomes adsorption capacity for water. The results showed that: mulberry leaf epidermis significantly different three forms of hair, including filamentous hair, spiny hairs and needle-shaped bristles are made of a cells. There filamentous hair follicles and small, slender filaments, mainly in the lower epidermis vein, and to larger and longer than the large vein on the small veins. Spiny hairs and hair follicles larger base was thick and fast small spiny, and the base of a small circle of thorns, are located on the upper leaf epidermis, there are some veins present on the epidermis. No needle hair follicles, very small needle-like, mainly in the upper and lower epidermis of the leaf veins, needle-shaped bristles on the base not dilated veins, needle-leaf hairs on base dilated. By structure of leaf trichomes quantity of skin much larger than the epidermis. Trichomes of the leaves have ion absorption capacity. In addition, configuration of leaf trichomes also good water retention capacity.
Keywords: trichomes ; Moraceae ; epidermal hair ; ion absorption ; water holding capacity of
目录
引言 5
1 材料与方法 6
1.1供试材料 6
1.2实验方法 6
2 结果与分析 7
2.1 表皮毛的分布特点 7
2.2 表皮毛的形态结构 9
2.2.1 丝状毛 9
2.2.2 刺状毛 10
2.2.3 针状毛 11
2.3 表皮毛的滞水量 12
2.4 表皮毛的离子吸收能力 12
2.4.1 表皮毛对钾离子的吸收能力 12
2.4.2 表皮毛对镁离子的吸收能力 13
3 讨论 14
致谢 15
参考文献 15
引言
构树（学名Broussonetia papyrifera）别名褚桃等，为落叶乔木，高10 - 20m；树皮暗灰色；小枝密生柔毛。它的树冠呈张开状态，树叶呈卵形或广卵形；树皮较平整且光滑，其颜色为浅灰色或灰褐色，并且不容易开裂，整个植株乳汁丰富。构树为强阳性树种，适应性特强，抗逆性强；具有速生性、适应性强、分布地域广、易繁殖、热量高、轮伐期短等特点，且其根系浅，侧根分布很广，生长速度快，萌芽力和分蘖力强，耐修剪,抗污染能力强[1-2]。构树在中国的温带、热带均有分布，不论是在平原、丘陵或山地都能良好的生长，其叶是一种很好的猪饲料，其韧皮纤文材质洁白，是一种造纸的高级原料，其根、树液和种子均可以入药，总之构树的经济价值很高，很具研究价值。
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