探讨园林彩叶植物叶彩色的成因解剖特征
毕业论文关键词：园林植物；彩叶；叶色；组织；细胞；花青素；类胡萝卜素；表皮毛
Anatomical Characteristics of the Leaf Color of 11 Kinds of Colorful Plants
Abstract:To investigate the cause of formation of the leaf colors of the color-leafed plants and provide new reference material for the research in biology of the color-leafed plants. By freehand section and paraffin section, and under the microscope, the characteristics of tissues and cells of leaves of 11 kinds of color-leafed plants were observed, such as Acer palmatum 'atropurpureum', Amygdalus persica f. Atropurpurea, Prunus Cerasifera f. atropurpurea. The results showed that the leaves of Acer palmatum 'atropurpureum', Amygdalus persica f. atropurpurea, Prunus Cerasifera f. atropurpurea, Photinia ×fraseria, Berberis thunbergii ‘atropurpurea’ and Setcreasea purpurea became red or about red, because that the cells in the leaves contain anthocyanin. The leaf color is close to yellow or white with various markings, because their cells contain some carotenoids or lack chlorophyll, such as Chlorephytum capense var. variegatum, Sansevieria trifasciata var. laurentii, Euonymus japonicus f. aureo-marginatus, Aucuba japonica var. variegata. The leaves of Magnolia grandiflora become rusty brown, because the leaves have the epidermal hairs including rusty brown substance. In addition, the read cells including tanthocyanin are different in position、style and density, and have a different amont of tanthocyanin in the red leaves. In a conclusion, different types or different kinds of the leaf colors of the color-leafed plants form in different tissues and cells. The free-hand section method is suitable to observe the characteristics of the tissues and cells, but the paraffin section method is not.
Keywords: Garden plant; Colored Leaf; Leaf color; Tissue; Cell; Anthocyanin; Carotenoid; Epidermal hair
目录
引言 1
1.材料与方法 2
1.1实验时间与地点 2
1.2实验材料与来源 2
1.3实验方法 3
2.结果和分析 5
2.1红枫 5
2.2红叶李 5
2.3红叶碧桃 6
2.4红叶石楠 7
2.5紫叶小檗 8
2.6紫鸭跖草 8
2.7银边吊兰 9
2.8金边虎尾兰 10
2.9金边黄杨 10
2.10洒金桃叶珊瑚 11
2.11广玉兰 12
3.讨论 12
致谢 14
参考文献 14
引言
广义上来说，彩叶植物是指叶片在一般生长季候里能稳定呈现出非绿色的植物，但狭义上来说则不包括秋色叶植物[1]。彩叶植物有多种分类方式，例如按季节可分为常色叶类、春色叶类以及秋色叶类；按色素分布可分为单色叶类、双色叶类、彩脉类、花叶类以及镶边类[2]。
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