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The hologenome concept of evolution after 10 years
The holobiont (host with its endocellular and extracellular microbiome) can function as a distinct biological entity, an additional organismal level to the ones previously considered, on which natural selection operates. The holobiont can function as a whole: anatomically, metabolically, immunologic...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
BioMed Central
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5922317/ https://www.ncbi.nlm.nih.gov/pubmed/29695294 http://dx.doi.org/10.1186/s40168-018-0457-9 |
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author | Rosenberg, Eugene Zilber-Rosenberg, Ilana |
author_facet | Rosenberg, Eugene Zilber-Rosenberg, Ilana |
author_sort | Rosenberg, Eugene |
collection | PubMed |
description | The holobiont (host with its endocellular and extracellular microbiome) can function as a distinct biological entity, an additional organismal level to the ones previously considered, on which natural selection operates. The holobiont can function as a whole: anatomically, metabolically, immunologically, developmentally, and during evolution. Consideration of the holobiont with its hologenome as an independent level of selection in evolution has led to a better understanding of underappreciated modes of genetic variation and evolution. The hologenome is comprised of two complimentary parts: host and microbiome genomes. Changes in either genome can result in variations that can be selected for or against. The host genome is highly conserved, and genetic changes within it occur slowly, whereas the microbiome genome is dynamic and can change rapidly in response to the environment by increasing or reducing particular microbes, by acquisition of novel microbes, by horizontal gene transfer, and by mutation. Recent experiments showing that microbiota can play an initial role in speciation have been suggested as an additional mode of enhancing evolution. Some of the genetic variations can be transferred to offspring by a variety of mechanisms. Strain-specific DNA analysis has shown that at least some of the microbiota can be maintained across hundreds of thousands of host generations, implying the existence of a microbial core. We argue that rapid changes in the microbiome genome could allow holobionts to adapt and survive under changing environmental conditions thus providing the time necessary for the host genome to adapt and evolve. As Darwin wrote, “It is not the strongest of the species that survives but the most adaptable”. |
format | Online Article Text |
id | pubmed-5922317 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | BioMed Central |
record_format | MEDLINE/PubMed |
spelling | pubmed-59223172018-05-07 The hologenome concept of evolution after 10 years Rosenberg, Eugene Zilber-Rosenberg, Ilana Microbiome Review The holobiont (host with its endocellular and extracellular microbiome) can function as a distinct biological entity, an additional organismal level to the ones previously considered, on which natural selection operates. The holobiont can function as a whole: anatomically, metabolically, immunologically, developmentally, and during evolution. Consideration of the holobiont with its hologenome as an independent level of selection in evolution has led to a better understanding of underappreciated modes of genetic variation and evolution. The hologenome is comprised of two complimentary parts: host and microbiome genomes. Changes in either genome can result in variations that can be selected for or against. The host genome is highly conserved, and genetic changes within it occur slowly, whereas the microbiome genome is dynamic and can change rapidly in response to the environment by increasing or reducing particular microbes, by acquisition of novel microbes, by horizontal gene transfer, and by mutation. Recent experiments showing that microbiota can play an initial role in speciation have been suggested as an additional mode of enhancing evolution. Some of the genetic variations can be transferred to offspring by a variety of mechanisms. Strain-specific DNA analysis has shown that at least some of the microbiota can be maintained across hundreds of thousands of host generations, implying the existence of a microbial core. We argue that rapid changes in the microbiome genome could allow holobionts to adapt and survive under changing environmental conditions thus providing the time necessary for the host genome to adapt and evolve. As Darwin wrote, “It is not the strongest of the species that survives but the most adaptable”. BioMed Central 2018-04-25 /pmc/articles/PMC5922317/ /pubmed/29695294 http://dx.doi.org/10.1186/s40168-018-0457-9 Text en © The Author(s). 2018 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated. |
spellingShingle | Review Rosenberg, Eugene Zilber-Rosenberg, Ilana The hologenome concept of evolution after 10 years |
title | The hologenome concept of evolution after 10 years |
title_full | The hologenome concept of evolution after 10 years |
title_fullStr | The hologenome concept of evolution after 10 years |
title_full_unstemmed | The hologenome concept of evolution after 10 years |
title_short | The hologenome concept of evolution after 10 years |
title_sort | hologenome concept of evolution after 10 years |
topic | Review |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5922317/ https://www.ncbi.nlm.nih.gov/pubmed/29695294 http://dx.doi.org/10.1186/s40168-018-0457-9 |
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