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A photosynthesis operon in the chloroplast genome drives speciation in evening primroses
Genetic incompatibility between the cytoplasm and the nucleus is thought to be a major factor in species formation, but mechanistic understanding of this process is poor. In evening primroses (Oenothera spp.), a model plant for organelle genetics and population biology, hybrid offspring regularly di...
Autores principales: | , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Oxford University Press
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8408503/ https://www.ncbi.nlm.nih.gov/pubmed/34048579 http://dx.doi.org/10.1093/plcell/koab155 |
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author | Zupok, Arkadiusz Kozul, Danijela Schöttler, Mark Aurel Niehörster, Julia Garbsch, Frauke Liere, Karsten Fischer, Axel Zoschke, Reimo Malinova, Irina Bock, Ralph Greiner, Stephan |
author_facet | Zupok, Arkadiusz Kozul, Danijela Schöttler, Mark Aurel Niehörster, Julia Garbsch, Frauke Liere, Karsten Fischer, Axel Zoschke, Reimo Malinova, Irina Bock, Ralph Greiner, Stephan |
author_sort | Zupok, Arkadiusz |
collection | PubMed |
description | Genetic incompatibility between the cytoplasm and the nucleus is thought to be a major factor in species formation, but mechanistic understanding of this process is poor. In evening primroses (Oenothera spp.), a model plant for organelle genetics and population biology, hybrid offspring regularly display chloroplast–nuclear incompatibility. This usually manifests in bleached plants, more rarely in hybrid sterility or embryonic lethality. Hence, most of these incompatibilities affect photosynthetic capability, a trait that is under selection in changing environments. Here we show that light-dependent misregulation of the plastid psbB operon, which encodes core subunits of photosystem II and the cytochrome b(6)f complex, can lead to hybrid incompatibility, and this ultimately drives speciation. This misregulation causes an impaired light acclimation response in incompatible plants. Moreover, as a result of their different chloroplast genotypes, the parental lines differ in photosynthesis performance upon exposure to different light conditions. Significantly, the incompatible chloroplast genome is naturally found in xeric habitats with high light intensities, whereas the compatible one is limited to mesic habitats. Consequently, our data raise the possibility that the hybridization barrier evolved as a result of adaptation to specific climatic conditions. |
format | Online Article Text |
id | pubmed-8408503 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Oxford University Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-84085032021-09-02 A photosynthesis operon in the chloroplast genome drives speciation in evening primroses Zupok, Arkadiusz Kozul, Danijela Schöttler, Mark Aurel Niehörster, Julia Garbsch, Frauke Liere, Karsten Fischer, Axel Zoschke, Reimo Malinova, Irina Bock, Ralph Greiner, Stephan Plant Cell Research Articles Genetic incompatibility between the cytoplasm and the nucleus is thought to be a major factor in species formation, but mechanistic understanding of this process is poor. In evening primroses (Oenothera spp.), a model plant for organelle genetics and population biology, hybrid offspring regularly display chloroplast–nuclear incompatibility. This usually manifests in bleached plants, more rarely in hybrid sterility or embryonic lethality. Hence, most of these incompatibilities affect photosynthetic capability, a trait that is under selection in changing environments. Here we show that light-dependent misregulation of the plastid psbB operon, which encodes core subunits of photosystem II and the cytochrome b(6)f complex, can lead to hybrid incompatibility, and this ultimately drives speciation. This misregulation causes an impaired light acclimation response in incompatible plants. Moreover, as a result of their different chloroplast genotypes, the parental lines differ in photosynthesis performance upon exposure to different light conditions. Significantly, the incompatible chloroplast genome is naturally found in xeric habitats with high light intensities, whereas the compatible one is limited to mesic habitats. Consequently, our data raise the possibility that the hybridization barrier evolved as a result of adaptation to specific climatic conditions. Oxford University Press 2021-05-28 /pmc/articles/PMC8408503/ /pubmed/34048579 http://dx.doi.org/10.1093/plcell/koab155 Text en © The Author(s) 2021. Published by Oxford University Press on behalf of American Society of Plant Biologists. https://creativecommons.org/licenses/by/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) ), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Articles Zupok, Arkadiusz Kozul, Danijela Schöttler, Mark Aurel Niehörster, Julia Garbsch, Frauke Liere, Karsten Fischer, Axel Zoschke, Reimo Malinova, Irina Bock, Ralph Greiner, Stephan A photosynthesis operon in the chloroplast genome drives speciation in evening primroses |
title | A photosynthesis operon in the chloroplast genome drives speciation in evening primroses |
title_full | A photosynthesis operon in the chloroplast genome drives speciation in evening primroses |
title_fullStr | A photosynthesis operon in the chloroplast genome drives speciation in evening primroses |
title_full_unstemmed | A photosynthesis operon in the chloroplast genome drives speciation in evening primroses |
title_short | A photosynthesis operon in the chloroplast genome drives speciation in evening primroses |
title_sort | photosynthesis operon in the chloroplast genome drives speciation in evening primroses |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8408503/ https://www.ncbi.nlm.nih.gov/pubmed/34048579 http://dx.doi.org/10.1093/plcell/koab155 |
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