胡枝子属2种植物叶片解剖学研究

Study on Anatomical Structure of Leaf of Two Species of Lespedeza

[目的]研究胡枝子属2种植物叶片的解剖结构。[方法]运用电镜扫描和光学显微镜技术,对兴安胡枝子(Lespedeza daurica)和细叶胡枝子(L.juncea var.subsericea)叶片进行解剖学研究。[结果]2种植物叶片结构相似,均为背腹型叶,表皮细胞不规则,上表皮气孔分布较多,下表皮几乎无气孔分布。2种胡枝子叶肉栅栏薄壁组织均为2层,海绵组织中均有晶体存在。兴安胡枝子的气孔密度大于细叶胡枝子。2种植物的叶片组织紧密度、叶片组织疏松度、栅海比差异并不明显。[结论]该研究可为兴安胡枝子和细叶胡枝子抗旱能力的评价以及抗旱机理研究提供形态解剖学方面的依据。

[Objective]To study the leaves anatomical structure of two species of Lespedeza.[Method]Through applying the scanning electron microscopic method and optical microscope technology,the leaves anatomical structure of Lespedeza daurica and L. juncea var. subsericea were observed.[Result]The leaf structure of these two kinds of plants was similar,belonging to the dorsoventrality type leaf. Their epidermic cells were irregular in shape and had many stoma,which was easy to observe but the lower epidermis had few stoma. The number of the stoma of the upper epidermis was more than the lower epidermis. There was no obvious difference in leaf tissue tightness,leaf tissue looseness between these two kinds of plants.[Conclusion]The study can provide morphologicol and anatomical research for the evaluation of drought resistance and the study of drought resistance mechanism.