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Broad Polyphyly in Pleurospermum s. 1. (Umbelliferae-Apioideae) as Inferred from nrDNA ITS and Chloroplast Sequences

Traditionally the genus Pleurospermum and the related genera Aulacospermum, Hymenidium, Hymenolaena, Physospermopsis, Pseudotrachydium, Pterocyclus, and Trachydium, have been problematic taxa with regard to their circumscription and composition. Pleurospermum s. s. includes one or two closely relate... Full description

Journal Title: Systematic botany 2012-04-01, Vol.37 (2), p.573-581
Main Author: Carmen M. Valiejo-Roman
Other Authors: Elena I. Terentieva , Michael G. Pimenov , Eugene V. Kljuykov , Tahir H. Samigullin , Patricia M. Tilney
Format: Electronic Article Electronic Article
Language: English
Subjects:
Quelle: Alma/SFX Local Collection
Publisher: American Society of Plant Taxonomists
ID: ISSN: 0363-6445
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recordid: cdi_jstor_primary_41515144
title: Broad Polyphyly in Pleurospermum s. 1. (Umbelliferae-Apioideae) as Inferred from nrDNA ITS and Chloroplast Sequences
format: Article
creator:
  • Carmen M. Valiejo-Roman
  • Elena I. Terentieva
  • Michael G. Pimenov
  • Eugene V. Kljuykov
  • Tahir H. Samigullin
  • Patricia M. Tilney
subjects:
  • Biological taxonomies
  • Chloroplasts
  • Datasets
  • Genera
  • Parsimony
  • Phylogenetics
  • Plant morphology
  • Plants
  • Polyphyly
  • Taxa
ispartof: Systematic botany, 2012-04-01, Vol.37 (2), p.573-581
description: Traditionally the genus Pleurospermum and the related genera Aulacospermum, Hymenidium, Hymenolaena, Physospermopsis, Pseudotrachydium, Pterocyclus, and Trachydium, have been problematic taxa with regard to their circumscription and composition. Pleurospermum s. s. includes one or two closely related boreal species but more than 40 other species, distributed mainly in the Sino-Himalayan floristic area, have been attributed to it by different authors in various classifications. Relationships in this taxonomic group are unclear. A molecular phylogenetic analysis of nuclear (nrITS) and cpDNA (psbA-trnH and trnL-trnF) sequences of representative species of Pleurospermum s. 1. and closely related Hymenidium, Aulacospermum, Trachydium, Physospermopsis, Pseudotrachydium, Sinolimprichtia, Pterocyclus, and Hymenolaena (55 species in all) was conducted and compared with an analysis of morphological characters. Only two traditional genera were supported as monophyletic groups in the molecular trees, namely Aulacospermum (including Pseudotrachydium) and Hymenolaena. Two stable groups were revealed within Hymenidium. One group included H. chloroleucum, H. heterosciadium, H. hookeri, and H. delavayi. The second included H. lindleyanum, H. stellatum, H. huzhihaoi, H. wilsonii, and Trachydium roylei. Various species of Hymenidium and Trachydium were scattered throughout the tree. The molecular data did not confirm an early divergence between northern and Sino-Himalayan species of Pleurospermum. This indicates that Pleurospermum s. 1. and most of the other genera included in this study are polyphyletic.
language: eng
source: Alma/SFX Local Collection
identifier: ISSN: 0363-6445
fulltext: fulltext
issn:
  • 0363-6445
  • 1548-2324
url: Link


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titleBroad Polyphyly in Pleurospermum s. 1. (Umbelliferae-Apioideae) as Inferred from nrDNA ITS and Chloroplast Sequences
sourceAlma/SFX Local Collection
creatorCarmen M. Valiejo-Roman ; Elena I. Terentieva ; Michael G. Pimenov ; Eugene V. Kljuykov ; Tahir H. Samigullin ; Patricia M. Tilney
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descriptionTraditionally the genus Pleurospermum and the related genera Aulacospermum, Hymenidium, Hymenolaena, Physospermopsis, Pseudotrachydium, Pterocyclus, and Trachydium, have been problematic taxa with regard to their circumscription and composition. Pleurospermum s. s. includes one or two closely related boreal species but more than 40 other species, distributed mainly in the Sino-Himalayan floristic area, have been attributed to it by different authors in various classifications. Relationships in this taxonomic group are unclear. A molecular phylogenetic analysis of nuclear (nrITS) and cpDNA (psbA-trnH and trnL-trnF) sequences of representative species of Pleurospermum s. 1. and closely related Hymenidium, Aulacospermum, Trachydium, Physospermopsis, Pseudotrachydium, Sinolimprichtia, Pterocyclus, and Hymenolaena (55 species in all) was conducted and compared with an analysis of morphological characters. Only two traditional genera were supported as monophyletic groups in the molecular trees, namely Aulacospermum (including Pseudotrachydium) and Hymenolaena. Two stable groups were revealed within Hymenidium. One group included H. chloroleucum, H. heterosciadium, H. hookeri, and H. delavayi. The second included H. lindleyanum, H. stellatum, H. huzhihaoi, H. wilsonii, and Trachydium roylei. Various species of Hymenidium and Trachydium were scattered throughout the tree. The molecular data did not confirm an early divergence between northern and Sino-Himalayan species of Pleurospermum. This indicates that Pleurospermum s. 1. and most of the other genera included in this study are polyphyletic.
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subjectBiological taxonomies ; Chloroplasts ; Datasets ; Genera ; Parsimony ; Phylogenetics ; Plant morphology ; Plants ; Polyphyly ; Taxa
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abstractTraditionally the genus Pleurospermum and the related genera Aulacospermum, Hymenidium, Hymenolaena, Physospermopsis, Pseudotrachydium, Pterocyclus, and Trachydium, have been problematic taxa with regard to their circumscription and composition. Pleurospermum s. s. includes one or two closely related boreal species but more than 40 other species, distributed mainly in the Sino-Himalayan floristic area, have been attributed to it by different authors in various classifications. Relationships in this taxonomic group are unclear. A molecular phylogenetic analysis of nuclear (nrITS) and cpDNA (psbA-trnH and trnL-trnF) sequences of representative species of Pleurospermum s. 1. and closely related Hymenidium, Aulacospermum, Trachydium, Physospermopsis, Pseudotrachydium, Sinolimprichtia, Pterocyclus, and Hymenolaena (55 species in all) was conducted and compared with an analysis of morphological characters. Only two traditional genera were supported as monophyletic groups in the molecular trees, namely Aulacospermum (including Pseudotrachydium) and Hymenolaena. Two stable groups were revealed within Hymenidium. One group included H. chloroleucum, H. heterosciadium, H. hookeri, and H. delavayi. The second included H. lindleyanum, H. stellatum, H. huzhihaoi, H. wilsonii, and Trachydium roylei. Various species of Hymenidium and Trachydium were scattered throughout the tree. The molecular data did not confirm an early divergence between northern and Sino-Himalayan species of Pleurospermum. This indicates that Pleurospermum s. 1. and most of the other genera included in this study are polyphyletic.
pubAmerican Society of Plant Taxonomists