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来源:百度知道 编辑:UC知道 时间:2024/05/15 11:13:39
利用常规石蜡制片技术,通过光学显微镜对大叶黄杨茎和叶进行了解剖学观察。研究表明:大叶黄杨茎和叶表皮细胞均具角质层;茎为辐射对称的轴器官,初生结构由表皮、皮层、维管束、髓和髓射线五部分组成,与普通薄壁细胞相比,细胞壁较厚,细胞间隙小。靠近表皮的薄壁细胞排列紧密,细胞壁明显加厚;叶栅栏组织为三层细胞组成,叶片下表面表皮内有2~3层细胞组成的紧密组织,海绵组织细胞排列较紧密,并在以上两部分细胞中均可见大量的内含物质;大叶黄杨叶片的气孔数目较少,且多分布于下表皮,这些均说明了大叶黄杨具有一定的抗寒,抗旱的功能。

Use conventional paraffin production technology, and optical microscope right Euonymus japonicus stems and leaves of anatomy. Research shows : Euonymus japonicus stem and leaf epidermis cells with cuticle; To stem the symmetry axis radiation organ from the primary structure of epidermis, cortex, vascular, pulp and pulp-ray five components, and parenchyma cells, the cell wall thickness, a small gap. Close to the thin epidermal cells with close walls obviously thickened; Mr fence for a three-tier organizations cells. Leaf epidermal surface within the next 2 ~ 3 layers of cells closely, spongy tissue cells with a relatively close, and some of the above two cells were found containing a large number of substances; Euonymus japonicus leaf stomatal fewer, While the distribution in the lower epidermis, which illustrates the Euonymus japonicus has certain Resistance function.