Cargando…
Rate accelerations in nuclear 18S rDNA of mycoheterotrophic and parasitic angiosperms
Rate variation in genes from all three genomes has been observed frequently in plant lineages with a parasitic and mycoheterotrophic mode of life. While the loss of photosynthetic ability leads to a relaxation of evolutionary constraints in genes involved in the photosynthetic apparatus, it remains...
Autores principales: | , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer Japan
2010
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3159761/ https://www.ncbi.nlm.nih.gov/pubmed/21188459 http://dx.doi.org/10.1007/s10265-010-0395-5 |
_version_ | 1782210488929615872 |
---|---|
author | Lemaire, Benny Huysmans, Suzy Smets, Erik Merckx, Vincent |
author_facet | Lemaire, Benny Huysmans, Suzy Smets, Erik Merckx, Vincent |
author_sort | Lemaire, Benny |
collection | PubMed |
description | Rate variation in genes from all three genomes has been observed frequently in plant lineages with a parasitic and mycoheterotrophic mode of life. While the loss of photosynthetic ability leads to a relaxation of evolutionary constraints in genes involved in the photosynthetic apparatus, it remains to be determined how prevalent increased substitution rates are in nuclear DNA of non-photosynthetic angiosperms. In this study we infer rates of molecular evolution of 18S rDNA of all parasitic and mycoheterotorphic plant families (except Lauraceae and Polygalaceae) using relative rate tests. In several holoparasitic and mycoheterotrophic plant lineages extremely high substitution rates are observed compared to other photosynthetic angiosperms. The position and frequency of these substitutions have been identified to understand the mutation dynamics of 18S rRNA in achlorophyllous plants. Despite the presence of significantly elevated substitution rates, very few mutations occur in major functional and structural regions of the small ribosomal molecule, providing evidence that the efficiency of the translational apparatus in non-photosynthetic plants has not been affected. |
format | Online Article Text |
id | pubmed-3159761 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2010 |
publisher | Springer Japan |
record_format | MEDLINE/PubMed |
spelling | pubmed-31597612011-09-21 Rate accelerations in nuclear 18S rDNA of mycoheterotrophic and parasitic angiosperms Lemaire, Benny Huysmans, Suzy Smets, Erik Merckx, Vincent J Plant Res Regular Paper Rate variation in genes from all three genomes has been observed frequently in plant lineages with a parasitic and mycoheterotrophic mode of life. While the loss of photosynthetic ability leads to a relaxation of evolutionary constraints in genes involved in the photosynthetic apparatus, it remains to be determined how prevalent increased substitution rates are in nuclear DNA of non-photosynthetic angiosperms. In this study we infer rates of molecular evolution of 18S rDNA of all parasitic and mycoheterotorphic plant families (except Lauraceae and Polygalaceae) using relative rate tests. In several holoparasitic and mycoheterotrophic plant lineages extremely high substitution rates are observed compared to other photosynthetic angiosperms. The position and frequency of these substitutions have been identified to understand the mutation dynamics of 18S rRNA in achlorophyllous plants. Despite the presence of significantly elevated substitution rates, very few mutations occur in major functional and structural regions of the small ribosomal molecule, providing evidence that the efficiency of the translational apparatus in non-photosynthetic plants has not been affected. Springer Japan 2010-12-25 2011 /pmc/articles/PMC3159761/ /pubmed/21188459 http://dx.doi.org/10.1007/s10265-010-0395-5 Text en © The Author(s) 2010 https://creativecommons.org/licenses/by-nc/4.0/ This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited. |
spellingShingle | Regular Paper Lemaire, Benny Huysmans, Suzy Smets, Erik Merckx, Vincent Rate accelerations in nuclear 18S rDNA of mycoheterotrophic and parasitic angiosperms |
title | Rate accelerations in nuclear 18S rDNA of mycoheterotrophic and parasitic angiosperms |
title_full | Rate accelerations in nuclear 18S rDNA of mycoheterotrophic and parasitic angiosperms |
title_fullStr | Rate accelerations in nuclear 18S rDNA of mycoheterotrophic and parasitic angiosperms |
title_full_unstemmed | Rate accelerations in nuclear 18S rDNA of mycoheterotrophic and parasitic angiosperms |
title_short | Rate accelerations in nuclear 18S rDNA of mycoheterotrophic and parasitic angiosperms |
title_sort | rate accelerations in nuclear 18s rdna of mycoheterotrophic and parasitic angiosperms |
topic | Regular Paper |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3159761/ https://www.ncbi.nlm.nih.gov/pubmed/21188459 http://dx.doi.org/10.1007/s10265-010-0395-5 |
work_keys_str_mv | AT lemairebenny rateaccelerationsinnuclear18srdnaofmycoheterotrophicandparasiticangiosperms AT huysmanssuzy rateaccelerationsinnuclear18srdnaofmycoheterotrophicandparasiticangiosperms AT smetserik rateaccelerationsinnuclear18srdnaofmycoheterotrophicandparasiticangiosperms AT merckxvincent rateaccelerationsinnuclear18srdnaofmycoheterotrophicandparasiticangiosperms |