Taxonomic value of leaf morphoanatomy in Brazilian Bunchosia species: Insights for the recognition of the Bunchosia clade

IF 2.2 4区生物学 Q3 ECOLOGY

Flora Pub Date : 2025-12-01 Epub Date: 2025-10-09 DOI:10.1016/j.flora.2025.152856

Ahanna Kamila da Silva , João Victor da Costa Santos , Josiane Silva Araújo

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Abstract

This is the first anatomical approach to distinguish taxa within the Bunchosia clade, whose phylogenetic hypothesis supports its monophyly, despite gaps in the group's taxonomy in its current arrangement. Aiming to support a more natural infra- and suprageneric classification, we explored the taxonomic potential of leaf morphoanatomical characters in Brazilian species of the genus Bunchosia and used taxa from other genera as an outgroup. The purely structural analyses allowed us to distinguish anatomical patterns that have not yet been explored in the literature of the group. The presence and morphotype of leaf trichomes, contour and vascular system of the petiole and midrib, presence of accessory bundles in the petiole, number of epidermal layers of the adaxial surface of the leaf, mesophyll type and leaf idioblasts are important subsidies for the taxonomy of Bunchosia clade. The presence, location, and surface type of nectaries may have phylogenetic significance within the group. The ID key allows us to distinguish Brazilian Bunchosia species. These findings contribute significantly to approaches that propose a natural classification.

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巴西花楸属植物叶片形态解剖学的分类学价值：对花楸枝识别的认识

这是第一个从解剖学角度来区分Bunchosia分支中的分类群的方法，其系统发育假说支持其单系性，尽管该组的分类在其目前的排列中存在差距。为了支持更自然的下属和上属分类，我们探索了巴西种的叶形态解剖特征的分类潜力，并将其他属的分类群作为外群。纯粹的结构分析使我们能够区分尚未在该群体的文献中探索的解剖模式。叶毛状体的存在和形态类型、叶柄和中脉的轮廓和维管系统、叶柄副束的存在、叶近表面表皮层数、叶肉类型和叶异母细胞是本枝分类的重要依据。蜜腺的存在、位置和表面类型可能在类群中具有系统发育意义。ID键使我们能够区分巴西斑蝶属的物种。这些发现为提出自然分类的方法做出了重大贡献。

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来源期刊

Flora 生物-植物科学

CiteScore

3.30

自引率

10.50%

发文量

130

审稿时长

54 days

期刊介绍： FLORA publishes original contributions and review articles on plant structure (morphology and anatomy), plant distribution (incl. phylogeography) and plant functional ecology (ecophysiology, population ecology and population genetics, organismic interactions, community ecology, ecosystem ecology). Manuscripts (both original and review articles) on a single topic can be compiled in Special Issues, for which suggestions are welcome. FLORA, the scientific botanical journal with the longest uninterrupted publication sequence (since 1818), considers manuscripts in the above areas which appeal a broad scientific and international readership. Manuscripts focused on floristics and vegetation science will only be considered if they exceed the pure descriptive approach and have relevance for interpreting plant morphology, distribution or ecology. Manuscripts whose content is restricted to purely systematic and nomenclature matters, to geobotanical aspects of only local interest, to pure applications in agri-, horti- or silviculture and pharmacology, and experimental studies dealing exclusively with investigations at the cellular and subcellular level will not be accepted. Manuscripts dealing with comparative and evolutionary aspects of morphology, anatomy and development are welcome.