Phylogenetic comparative morphological analysis of fern spores in subfamily Pteridoideae (Pteridaceae, Pteridophyta),Microscopy Research and Technique

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Phylogenetic comparative morphological analysis of fern spores in subfamily Pteridoideae (Pteridaceae, Pteridophyta)
Microscopy Research and Technique ( IF 2.0 ) Pub Date : 2021-08-31 , DOI: 10.1002/jemt.23921
Alexey V Vaganov _{1,

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Affiliation

Scanning electron microscopy (SEM) was used to characterize spore morphology of 24 taxa of the subfamily Pteridoideae C. Chr. ex Crabbe, Jermy & Mickel of the family Pteridaceae E.D.M. Kirchn. The family is considered to be one of the most taxonomically confusing families due to its high level of polymorphism. The standardized data on spore morphology of the subfamily Pteridoideae were projected onto the final phylogenetic tree in the Mesquite program. This approach made it possible to carry out a comprehensive interdisciplinary analysis of the evolution of spore morphology characters of the subfamily Pteridoideae, as well as to assess the relationships in the family Pteridaceae. The equatorial ridge (cingulum, “flange”) has been proven as one of the key spore morphology features, which confirms the close relationship of “Onychium clade” with Pteris. The species-specific characters of the subfamily are fold and tubercle along laesura, equatorial ridge on proximal and distal side, tubercle, and folds on proximal and distal side. The knowledge will help to solve the problems of taxonomy in the family Preridaceae and to supplement the information on the natural classification of the subfamily Pteridoideae.

中文翻译：

蕨科蕨科蕨类植物孢子的系统发育比较形态分析

扫描电子显微镜 (SEM) 用于表征蕨科 C. Chr. 亚科 24 个分类群的孢子形态。来自蕨科 EDM Kirchn 家族的前 Crabbe、Jermy 和 Mickel。由于其高水平的多态性，该家族被认为是分类学上最令人困惑的家族之一。蕨类植物亚科孢子形态的标准化数据被投影到豆科植物程序中的最终系统发育树上。这种方法使得对蕨科亚科孢子形态特征的进化进行全面的跨学科分析成为可能，以及评估蕨科的关系。赤道脊（扣带，“法兰”）已被证明是关键的孢子形态特征之一，这证实了“ Onychium clade”与Pteris的密切关系。该亚科的物种特异性特征是沿laesura的褶皱和结节，近端和远端的赤道脊，结节以及近端和远端的褶皱。这些知识将有助于解决蕨科的分类学问题，补充蕨科亚科的自然分类信息。

更新日期：2021-08-31

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