Molecular phylogeny of the leafy liverwort Lejeunea (Porellales): evidence for a neotropical origin, uneven distribution of sexual systems and insufficient taxonomy.

<h4>Background</h4>Lejeunea is a largely epiphytic, subcosmopolitan liverwort genus with a complex taxonomic history. Species circumscriptions and their relationships are subject to controversy; biogeographic history and diversification through time are largely unknown.<h4>Methodol...

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Autores principales:	Jochen Heinrichs, Shanshan Dong, Alfons Schäfer-Verwimp, Tamás Pócs, Kathrin Feldberg, Aleksandra Czumaj, Alexander R Schmidt, Joachim Reitner, Matt A M Renner, Joern Hentschel, Michael Stech, Harald Schneider
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d851191f072c496e9b15374ee232859c
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spelling	oai:doaj.org-article:d851191f072c496e9b15374ee232859c2021-11-18T08:41:23ZMolecular phylogeny of the leafy liverwort Lejeunea (Porellales): evidence for a neotropical origin, uneven distribution of sexual systems and insufficient taxonomy.1932-620310.1371/journal.pone.0082547https://doaj.org/article/d851191f072c496e9b15374ee232859c2013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24367522/?tool=EBIhttps://doaj.org/toc/1932-6203<h4>Background</h4>Lejeunea is a largely epiphytic, subcosmopolitan liverwort genus with a complex taxonomic history. Species circumscriptions and their relationships are subject to controversy; biogeographic history and diversification through time are largely unknown.<h4>Methodology and results</h4>We employed sequences of two chloroplast regions (trnL-trnF, rbcL) and the nuclear ribosomal ITS region of 332 accessions to explore the phylogeny of the Harpalejeunea-Lejeunea-Microlejeunea complex. Lejeunea forms a well-supported clade that splits into two main lineages corresponding to L. subg. Lejeunea and L. subg. Crossotolejeunea. Neotropical accessions dominate early diverging lineages of both main clades of Lejeunea. This pattern suggests an origin in the Neotropics followed by several colonizations from the Neotropics into the Paleotropics and vice versa. Most Afro-Madagascan clades are related to Asian clades. Several temperate Lejeunea radiations were detected. Eighty two of the 91 investigated Lejeunea species could be identified to species level. Of these 82 species, 54 were represented by multiple accessions (25 para- or polyphyletic, 29 monophyletic). Twenty nine of the 36 investigated species of L. subg. Lejeunea were monoicous and 7 dioicous. Within L. subg. Crossotolejeunea, 15 of the 46 investigated species were monoicous and 31 dioicous. Some dioicous as well as some monoicous species have disjunct ranges.<h4>Conclusions/significance</h4>We present the first global phylogeny of Lejeunea and the first example of a Neotropical origin of a Pantropical liverwort genus. Furthermore, we provide evidence for the Neotropics as a cradle of Lejeunea lineages and detect post-colonization radiations in Asia, Australasia, Afro-Madagascar and Europe. Dioicy/monoicy shifts are likely non-randomly distributed. The presented phylogeny points to the need of integrative taxonomical studies to clarify many Lejeunea binomials. Most importantly, it provides a framework for future studies on the diversification of this lineage in space and time, especially in the context of sexual systems in Lejeuneaceae.Jochen HeinrichsShanshan DongAlfons Schäfer-VerwimpTamás PócsKathrin FeldbergAleksandra CzumajAlexander R SchmidtJoachim ReitnerMatt A M RennerJoern HentschelMichael StechHarald SchneiderPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 12, p e82547 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jochen Heinrichs Shanshan Dong Alfons Schäfer-Verwimp Tamás Pócs Kathrin Feldberg Aleksandra Czumaj Alexander R Schmidt Joachim Reitner Matt A M Renner Joern Hentschel Michael Stech Harald Schneider Molecular phylogeny of the leafy liverwort Lejeunea (Porellales): evidence for a neotropical origin, uneven distribution of sexual systems and insufficient taxonomy.
description	<h4>Background</h4>Lejeunea is a largely epiphytic, subcosmopolitan liverwort genus with a complex taxonomic history. Species circumscriptions and their relationships are subject to controversy; biogeographic history and diversification through time are largely unknown.<h4>Methodology and results</h4>We employed sequences of two chloroplast regions (trnL-trnF, rbcL) and the nuclear ribosomal ITS region of 332 accessions to explore the phylogeny of the Harpalejeunea-Lejeunea-Microlejeunea complex. Lejeunea forms a well-supported clade that splits into two main lineages corresponding to L. subg. Lejeunea and L. subg. Crossotolejeunea. Neotropical accessions dominate early diverging lineages of both main clades of Lejeunea. This pattern suggests an origin in the Neotropics followed by several colonizations from the Neotropics into the Paleotropics and vice versa. Most Afro-Madagascan clades are related to Asian clades. Several temperate Lejeunea radiations were detected. Eighty two of the 91 investigated Lejeunea species could be identified to species level. Of these 82 species, 54 were represented by multiple accessions (25 para- or polyphyletic, 29 monophyletic). Twenty nine of the 36 investigated species of L. subg. Lejeunea were monoicous and 7 dioicous. Within L. subg. Crossotolejeunea, 15 of the 46 investigated species were monoicous and 31 dioicous. Some dioicous as well as some monoicous species have disjunct ranges.<h4>Conclusions/significance</h4>We present the first global phylogeny of Lejeunea and the first example of a Neotropical origin of a Pantropical liverwort genus. Furthermore, we provide evidence for the Neotropics as a cradle of Lejeunea lineages and detect post-colonization radiations in Asia, Australasia, Afro-Madagascar and Europe. Dioicy/monoicy shifts are likely non-randomly distributed. The presented phylogeny points to the need of integrative taxonomical studies to clarify many Lejeunea binomials. Most importantly, it provides a framework for future studies on the diversification of this lineage in space and time, especially in the context of sexual systems in Lejeuneaceae.
format	article
author	Jochen Heinrichs Shanshan Dong Alfons Schäfer-Verwimp Tamás Pócs Kathrin Feldberg Aleksandra Czumaj Alexander R Schmidt Joachim Reitner Matt A M Renner Joern Hentschel Michael Stech Harald Schneider
author_facet	Jochen Heinrichs Shanshan Dong Alfons Schäfer-Verwimp Tamás Pócs Kathrin Feldberg Aleksandra Czumaj Alexander R Schmidt Joachim Reitner Matt A M Renner Joern Hentschel Michael Stech Harald Schneider
author_sort	Jochen Heinrichs
title	Molecular phylogeny of the leafy liverwort Lejeunea (Porellales): evidence for a neotropical origin, uneven distribution of sexual systems and insufficient taxonomy.
title_short	Molecular phylogeny of the leafy liverwort Lejeunea (Porellales): evidence for a neotropical origin, uneven distribution of sexual systems and insufficient taxonomy.
title_full	Molecular phylogeny of the leafy liverwort Lejeunea (Porellales): evidence for a neotropical origin, uneven distribution of sexual systems and insufficient taxonomy.
title_fullStr	Molecular phylogeny of the leafy liverwort Lejeunea (Porellales): evidence for a neotropical origin, uneven distribution of sexual systems and insufficient taxonomy.
title_full_unstemmed	Molecular phylogeny of the leafy liverwort Lejeunea (Porellales): evidence for a neotropical origin, uneven distribution of sexual systems and insufficient taxonomy.
title_sort	molecular phylogeny of the leafy liverwort lejeunea (porellales): evidence for a neotropical origin, uneven distribution of sexual systems and insufficient taxonomy.
publisher	Public Library of Science (PLoS)
publishDate	2013
url	https://doaj.org/article/d851191f072c496e9b15374ee232859c
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Molecular phylogeny of the leafy liverwort Lejeunea (Porellales): evidence for a neotropical origin, uneven distribution of sexual systems and insufficient taxonomy.

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