Complex evolutionary history of the Aeromonas veronii group revealed by host interaction and DNA sequence data.

Aeromonas veronii biovar sobria, Aeromonas veronii biovar veronii, and Aeromonas allosaccharophila are a closely related group of organisms, the Aeromonas veronii Group, that inhabit a wide range of host animals as a symbiont or pathogen. In this study, the ability of various strains to colonize the...

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Autores principales:	Adam C Silver, David Williams, Joshua Faucher, Amy J Horneman, J Peter Gogarten, Joerg Graf
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2011
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/9d47593ce0834d22b7cce05411c81387
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spelling	oai:doaj.org-article:9d47593ce0834d22b7cce05411c813872021-11-18T06:58:44ZComplex evolutionary history of the Aeromonas veronii group revealed by host interaction and DNA sequence data.1932-620310.1371/journal.pone.0016751https://doaj.org/article/9d47593ce0834d22b7cce05411c813872011-02-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/21359176/?tool=EBIhttps://doaj.org/toc/1932-6203Aeromonas veronii biovar sobria, Aeromonas veronii biovar veronii, and Aeromonas allosaccharophila are a closely related group of organisms, the Aeromonas veronii Group, that inhabit a wide range of host animals as a symbiont or pathogen. In this study, the ability of various strains to colonize the medicinal leech as a model for beneficial symbiosis and to kill wax worm larvae as a model for virulence was determined. Isolates cultured from the leech out-competed other strains in the leech model, while most strains were virulent in the wax worms. Three housekeeping genes, recA, dnaJ and gyrB, the gene encoding chitinase, chiA, and four loci associated with the type three secretion system, ascV, ascFG, aexT, and aexU were sequenced. The phylogenetic reconstruction failed to produce one consensus tree that was compatible with most of the individual genes. The Approximately Unbiased test and the Genetic Algorithm for Recombination Detection both provided further support for differing evolutionary histories among this group of genes. Two contrasting tests detected recombination within aexU, ascFG, ascV, dnaJ, and gyrB but not in aexT or chiA. Quartet decomposition analysis indicated a complex recent evolutionary history for these strains with a high frequency of horizontal gene transfer between several but not among all strains. In this study we demonstrate that at least for some strains, horizontal gene transfer occurs at a sufficient frequency to blur the signal from vertically inherited genes, despite strains being adapted to distinct niches. Simply increasing the number of genes included in the analysis is unlikely to overcome this challenge in organisms that occupy multiple niches and can exchange DNA between strains specialized to different niches. Instead, the detection of genes critical in the adaptation to specific niches may help to reveal the physiological specialization of these strains.Adam C SilverDavid WilliamsJoshua FaucherAmy J HornemanJ Peter GogartenJoerg GrafPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 6, Iss 2, p e16751 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Adam C Silver David Williams Joshua Faucher Amy J Horneman J Peter Gogarten Joerg Graf Complex evolutionary history of the Aeromonas veronii group revealed by host interaction and DNA sequence data.
description	Aeromonas veronii biovar sobria, Aeromonas veronii biovar veronii, and Aeromonas allosaccharophila are a closely related group of organisms, the Aeromonas veronii Group, that inhabit a wide range of host animals as a symbiont or pathogen. In this study, the ability of various strains to colonize the medicinal leech as a model for beneficial symbiosis and to kill wax worm larvae as a model for virulence was determined. Isolates cultured from the leech out-competed other strains in the leech model, while most strains were virulent in the wax worms. Three housekeeping genes, recA, dnaJ and gyrB, the gene encoding chitinase, chiA, and four loci associated with the type three secretion system, ascV, ascFG, aexT, and aexU were sequenced. The phylogenetic reconstruction failed to produce one consensus tree that was compatible with most of the individual genes. The Approximately Unbiased test and the Genetic Algorithm for Recombination Detection both provided further support for differing evolutionary histories among this group of genes. Two contrasting tests detected recombination within aexU, ascFG, ascV, dnaJ, and gyrB but not in aexT or chiA. Quartet decomposition analysis indicated a complex recent evolutionary history for these strains with a high frequency of horizontal gene transfer between several but not among all strains. In this study we demonstrate that at least for some strains, horizontal gene transfer occurs at a sufficient frequency to blur the signal from vertically inherited genes, despite strains being adapted to distinct niches. Simply increasing the number of genes included in the analysis is unlikely to overcome this challenge in organisms that occupy multiple niches and can exchange DNA between strains specialized to different niches. Instead, the detection of genes critical in the adaptation to specific niches may help to reveal the physiological specialization of these strains.
format	article
author	Adam C Silver David Williams Joshua Faucher Amy J Horneman J Peter Gogarten Joerg Graf
author_facet	Adam C Silver David Williams Joshua Faucher Amy J Horneman J Peter Gogarten Joerg Graf
author_sort	Adam C Silver
title	Complex evolutionary history of the Aeromonas veronii group revealed by host interaction and DNA sequence data.
title_short	Complex evolutionary history of the Aeromonas veronii group revealed by host interaction and DNA sequence data.
title_full	Complex evolutionary history of the Aeromonas veronii group revealed by host interaction and DNA sequence data.
title_fullStr	Complex evolutionary history of the Aeromonas veronii group revealed by host interaction and DNA sequence data.
title_full_unstemmed	Complex evolutionary history of the Aeromonas veronii group revealed by host interaction and DNA sequence data.
title_sort	complex evolutionary history of the aeromonas veronii group revealed by host interaction and dna sequence data.
publisher	Public Library of Science (PLoS)
publishDate	2011
url	https://doaj.org/article/9d47593ce0834d22b7cce05411c81387
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Complex evolutionary history of the Aeromonas veronii group revealed by host interaction and DNA sequence data.

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