Taxonomy and comparative anatomical studies of Viola sect. Sclerosium (Violaceae) in Iran

Maryam Mohammadi Shahrestani, Shahryar SAEIDI MEHRVARZ, T. Marcussen, Narjes Yousefi
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引用次数: 9

Abstract

Abstract The comparative anatomy of three morphologically close taxa of Viola sect. Sclerosium W. Becker distributed in southern Iran is presented in this study: Viola behboudiana, Viola cinerea and Viola stocksii. Cross-sections of roots, stems, peduncles, petioles, leaves and the surface sections of leaves showed that the following properties were taxonomically informative: number of collenchymatous cell layers in the stem, presence or absence of cortical bundles in the stem, number of vascular bundles in the peduncle, presence or absence of calcium oxalate crystals in the peduncle cortex, presence or absence of trichomes on the epidermis of the peduncle, shape of collenchyma cells in the petiole, and midrib outline of the leaf. Numerical analysis (unweighted pair-group method with arithmetic averages, principal components analysis) of 55 qualitative and quantitative characters confirmed the delimitation of three taxa.
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标题伊朗堇菜科堇菜组的分类与比较解剖学研究
摘要本文对分布于伊朗南部的堇菜(Viola Sclerosium W. Becker)组3个形态相近的分类群Viola behboudiana、Viola cinerea和Viola stocksii进行了比较解剖。根、茎、梗、叶柄、叶的横截面和叶的表面截面显示了以下特征:茎中厚壁细胞的层数,茎中皮层束的存在与否,花梗中维管束的数量,花梗皮层中草酸钙晶体的存在与否,花梗表皮上毛状体的存在与否,叶柄中厚壁细胞的形状,叶中脉的轮廓。55个定性和定量性状的数值分析(算术平均、主成分分析的非加权对群法)确定了3个分类群的划分。
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