Micromorphology of the leaf structures of Aronia Medik. and Pourthiaea Decne (Rosaceae)

IF 2.1 3区农林科学 Q2 FORESTRY Trees Pub Date : 2024-10-12 DOI:10.1007/s00468-024-02570-1

Yu. K. Vinogradova, A. V. Babosha, A. S. Ryabchenko, T. Kh. Kumachova

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Key message

The deciduous species of the Aronia and Pourthiaea genera are differentiated by the finger-shaped colleters present on the midrib of the adaxial side and the pronounced cuticular folding.

Abstract

This work presents data on taxonomically significant features of leaf micromorphology in six deciduous species from the closely related genera Aronia and Pourthiaea of the subtribe Malinae (formerly Pyrinae, Maloideae) in the family Rosaceae. All species were found to have hypostomate leaves with numerous anomocytic stomata on the abaxial side. However, Aronia arbutifolia, Pourthiaea arguta, and P. villosa showed single stomata on leaf teeth on the adaxial leaf side. All species exhibited stomatal dimorphism, with a large single ‘primary’ stomata at the center of a cluster of smaller ‘secondary’ (ordinary) stomata. Aronia species were characterized by well-defined cuticular striations on the surface of the adaxial epidermis, as well as cuticular radial folds and peristomatic folds in both types of stomata. Cuticular folding in Pourthiaea species is restricted to radial folds in primary stomata and is less pronounced or absent in secondary stomata. All species of Aronia and Pourthiaea have colleters of deltoid or elongated shape in leaf teeth. In A. mitschurinii and A. arbutifolia, rounded colleters were found in the sinuses between the leaf teeth. Aronia species have the unique feature of forming a special type of colleters on the adaxial side of the leaf midribs. In contrast, Pourthiaea species lacked similar structures. The secretion of the colleters showed an intense peak at 670-674 nm with a small shoulder in the range of 695-740 nm in its fluorescence spectrum. The micromorphological features of the studied leaf structures can serve as taxonomic characters in the genera Aronia and Pourthiaea.

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Aronia Medik.和 Pourthiaea Decne（蔷薇科）叶片结构的微形态学

摘要本研究介绍了蔷薇科马蔺亚属（原马缨丹属、马缨丹科）中密切相关的马缨丹属（Aronia）和马缨丹属（Pourthiaea）的 6 个落叶物种的叶片微形态特征，这些特征在分类学上具有重要意义。研究发现，所有物种的叶片背面都有许多无细胞气孔。然而，Aronia arbutifolia、Pourthiaea arguta 和 P. villosa 在叶正面的叶齿上显示出单个气孔。所有物种都表现出气孔二态性，在一簇较小的 "次生"（普通）气孔中心有一个大的单个 "主 "气孔。Aronia 物种的特点是正面表皮有清晰的角质层条纹，两种气孔都有角质层径向褶皱和蠕动褶皱。Pourthiaea 种类的角质褶皱仅限于初级气孔中的径向褶皱，次级气孔中的角质褶皱则不太明显或不存在。所有 Aronia 和 Pourthiaea 物种的叶齿都有正三角形或拉长形状的卷曲器。在 A. mitschurinii 和 A. arbutifolia 中，叶齿之间的窦中发现了圆形的栓皮。Aronia 树种的独特之处是在叶中肋的正面形成一种特殊类型的卷曲器。相比之下，Pourthiaea 种类缺乏类似的结构。同轴体的分泌物在荧光光谱的 670-674 纳米波长处显示出强烈的峰值，在 695-740 纳米波长范围内有一个小肩。所研究的叶片结构的微形态特征可作为 Aronia 属和 Pourthiaea 属的分类特征。

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来源期刊

Trees 农林科学-林学

CiteScore

4.50

自引率

4.30%

发文量

113

审稿时长

3.8 months

期刊介绍： Trees - Structure and Function publishes original articles on the physiology, biochemistry, functional anatomy, structure and ecology of trees and other woody plants. Also presented are articles concerned with pathology and technological problems, when they contribute to the basic understanding of structure and function of trees. In addition to original articles and short communications, the journal publishes reviews on selected topics concerning the structure and function of trees.