Abstract

The micromorphological characters of leaves in the genus Quercus have proved very useful in their taxonomy. A microhistological study of the most representative species of the genus Quercus in the eastern part of Sierra Morena (southern Iberian Peninsula) is carried out in this work: Q. coccifera, Q. faginea subsp. faginea, Q. pyrenaica, Q. rotundifolia and Q. suber. The leaves microcharacters were studied, measured, photographed and compared in order to provide a good description by optical microscope. In particular, features related to trichomes, stomata and epidermal cells on adaxial and abaxial leaf surface have been used. The data for 21 variables were collected. Our study confirms the usefulness of the micromorphological characters of the leaf epidermis and optical microscopy to distinguish between Quercus species, and has helped to identify the studied species. Some of the species can be identified by a single diagnostic character, and others by a combination of few characters. Based on the set of analyzed characteristics, a dichotomy key for the differentiation of the five taxa studied in this work is proposed.

摘要

栎属的叶子的微观形态特征已被证明在其分类学中非常有用。在这项工作中进行了对莫雷纳山脉东部（伊比利亚半岛南部）最具代表性的栎属物种的显微组织学研究：Q. coccifera，Q. faginea subsp.。faginea，Q.pyrenaica，Q.rotundifolia和Q.suber。对叶片的微特征进行了研究，测量，照相和比较，以便通过光学显微镜提供良好的描述。特别地，已经使用了与叶的正面和背面上的毛状体，气孔和表皮细胞有关的特征。收集了21个变量的数据。我们的研究证实了叶表皮的微观形态特征和光学显微镜对区分栎属物种的有用性，并有助于鉴定所研究的物种。某些物种可以通过单个诊断字符来识别，而其他物种可以通过几个字符的组合来识别。基于分析的特征集，提出了区分本文研究的五个分类群的二分法关键。