中国芦荟叶的形态解剖学研究

Morphological and Anatomical Studies on the Leaf of Aole vera L. var. Chinensis (Haw) Berg.

对芦荟成熟叶的形态及不同部位的解剖学研究结果表明，中国芦荟叶具有早生植物的形态结构特征。表应外具有厚的角质层。气孔下陷，具较大的孔下室。叶肉分为２部分，由同化薄壁组织和储水薄壁组织组成。同化薄壁组织中栅栏组织和海绵组织分化不明显，储水组织占叶面积的１／２以上。维管束里环状分布，叶基部 ２轮，叶中、上部１轮。第１轮维管束位于同化薄壁组织和储水组织之间，其中韧皮薄壁组织细胞发达。

Anatomical and morphological studies showed that the structure and morphology of the leaf of Aole vera L. var. chinensis had the characteristics of the xerophyte. The epidermis has thicker outer wall and there was ambiguous differentiation between spongy and palisade tissue in mesophyll. The aqueous tissue played a most important role in the whole transaction of the leaf. The vascular bundles distributed in rings. The rings distributed in the middle and upper parts of the leaf were adjacent to the mesophyll, in which the vascular bundles were composed of large and well-developed parenchymatous cells. However, in the ho part of the leaf, there was another ring of vascular bundles only surrounded by the oqueous tissue besides the one described above.