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Lineage-Specific Expansion of the Chalcone Synthase Gene Family in Rosids

Rosids are a monophyletic group that includes approximately 70,000 species in 140 families, and they are found in a variety of habitats and life forms. Many important crops such as fruit trees and legumes are rosids. The evolutionary success of this group may have been influenced by their ability to...

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Autores principales: Zavala, Kattina, Opazo, Juan C.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4504668/
https://www.ncbi.nlm.nih.gov/pubmed/26181912
http://dx.doi.org/10.1371/journal.pone.0133400
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author Zavala, Kattina
Opazo, Juan C.
author_facet Zavala, Kattina
Opazo, Juan C.
author_sort Zavala, Kattina
collection PubMed
description Rosids are a monophyletic group that includes approximately 70,000 species in 140 families, and they are found in a variety of habitats and life forms. Many important crops such as fruit trees and legumes are rosids. The evolutionary success of this group may have been influenced by their ability to produce flavonoids, secondary metabolites that are synthetized through a branch of the phenylpropanoid pathway where chalcone synthase is a key enzyme. In this work, we studied the evolution of the chalcone synthase gene family in 12 species belonging to the rosid clade. Our results show that the last common ancestor of the rosid clade possessed six chalcone synthase gene lineages that were differentially retained during the evolutionary history of the group. In fact, of the six gene lineages that were present in the last common ancestor, 7 species retained 2 of them, whereas the other 5 only retained one gene lineage. We also show that one of the gene lineages was disproportionately expanded in species that belonged to the order Fabales (soybean, barrel medic and Lotus japonicas). Based on the available literature, we suggest that this gene lineage possesses stress-related biological functions (e.g., response to UV light, pathogen defense). We propose that the observed expansion of this clade was a result of a selective pressure to increase the amount of enzymes involved in the production of phenylpropanoid pathway-derived secondary metabolites, which is consistent with the hypothesis that suggested that lineage-specific expansions fuel plant adaptation.
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spelling pubmed-45046682015-07-17 Lineage-Specific Expansion of the Chalcone Synthase Gene Family in Rosids Zavala, Kattina Opazo, Juan C. PLoS One Research Article Rosids are a monophyletic group that includes approximately 70,000 species in 140 families, and they are found in a variety of habitats and life forms. Many important crops such as fruit trees and legumes are rosids. The evolutionary success of this group may have been influenced by their ability to produce flavonoids, secondary metabolites that are synthetized through a branch of the phenylpropanoid pathway where chalcone synthase is a key enzyme. In this work, we studied the evolution of the chalcone synthase gene family in 12 species belonging to the rosid clade. Our results show that the last common ancestor of the rosid clade possessed six chalcone synthase gene lineages that were differentially retained during the evolutionary history of the group. In fact, of the six gene lineages that were present in the last common ancestor, 7 species retained 2 of them, whereas the other 5 only retained one gene lineage. We also show that one of the gene lineages was disproportionately expanded in species that belonged to the order Fabales (soybean, barrel medic and Lotus japonicas). Based on the available literature, we suggest that this gene lineage possesses stress-related biological functions (e.g., response to UV light, pathogen defense). We propose that the observed expansion of this clade was a result of a selective pressure to increase the amount of enzymes involved in the production of phenylpropanoid pathway-derived secondary metabolites, which is consistent with the hypothesis that suggested that lineage-specific expansions fuel plant adaptation. Public Library of Science 2015-07-16 /pmc/articles/PMC4504668/ /pubmed/26181912 http://dx.doi.org/10.1371/journal.pone.0133400 Text en © 2015 Zavala, Opazo http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.
spellingShingle Research Article
Zavala, Kattina
Opazo, Juan C.
Lineage-Specific Expansion of the Chalcone Synthase Gene Family in Rosids
title Lineage-Specific Expansion of the Chalcone Synthase Gene Family in Rosids
title_full Lineage-Specific Expansion of the Chalcone Synthase Gene Family in Rosids
title_fullStr Lineage-Specific Expansion of the Chalcone Synthase Gene Family in Rosids
title_full_unstemmed Lineage-Specific Expansion of the Chalcone Synthase Gene Family in Rosids
title_short Lineage-Specific Expansion of the Chalcone Synthase Gene Family in Rosids
title_sort lineage-specific expansion of the chalcone synthase gene family in rosids
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4504668/
https://www.ncbi.nlm.nih.gov/pubmed/26181912
http://dx.doi.org/10.1371/journal.pone.0133400
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