畢業論文

打賞
當前位置: 畢業論文 > 生物論文 >

構樹葉表皮毛的結構特征及鈣離子銨離子吸收測試

時間:2019-04-07 20:23來源:畢業論文
構樹葉表皮毛有很好的滯水效果。由觀察表明構樹葉上下兩面都有很多表皮毛,計算所得上表皮的密度比下表皮的密度小

摘要:植物葉表皮毛是葉表皮上一種特殊的結構,是由葉表皮細胞特化而形成。本次研究主要針對構樹葉表皮毛而進行,采用對構樹葉橫切片光學顯微鏡下觀察和直接在解剖鏡下對構樹葉表皮毛結構觀察,研究發現構樹葉表皮毛具有一些特征:所有的構樹葉表皮毛是單細胞毛,大部分有毛囊,鑲嵌在表皮上,極小部分無毛囊;構樹葉的表皮毛上表皮比下表皮稀疏并且較粗壯短小,有針形狀和錐形狀,并且有較大的毛囊,成熟的針狀表皮毛周圍有一圈細小的單細胞毛,葉脈上也有表皮毛較稀疏;葉下表皮毛較上表皮更為濃密,大部分毛是針狀,部分成熟表皮毛為鉤狀,葉脈上也有表皮毛,主葉脈比小葉脈稀疏。相對與表皮而言,突起的表皮毛表面積大,并且表皮毛有不同形狀的結構,有更大的附著面積,通過實驗得知,構樹葉表皮毛有很好的滯水效果。由觀察表明構樹葉上下兩面都有很多表皮毛,計算所得上表皮的密度比下表皮的密度小。通過對構樹葉表皮毛用鈣離子和銨離子進行離子吸收實驗,其結果表明構樹葉表皮毛能吸收鈣離子和銨離子,具備吸收離子的能力。34359
畢業論文關鍵詞:構樹;表皮毛;密度;滯水;離子吸收
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. 源¥自%六^^維*論-文+網=www.aftnzs.live
Key words: Broussonetia papyrifera; Leaf epidermal hair; Density; The degree of stagnant water; Ion absorption
目錄
引言    5
表皮毛的概述    5
表皮毛的結構特征    5
表皮毛的研究現狀    5
本課題研究及其意義    6
1材料與方法    7
1.1材料    7
1.2方法    7
1.2.1構樹葉表皮毛切片制作結構觀察    7
1.2.2構樹葉表皮毛密度測量    7
1.2.3構樹葉表皮毛離子吸收實驗    7
1.2.4構樹葉滯水實驗    7
2結果及分析    8 構樹葉表皮毛的結構特征及鈣離子銨離子吸收測試:http://www.aftnzs.live/shengwu/20190407/31832.html
------分隔線----------------------------
推薦內容
双色球走势图带连线