Thirteen New Plastid Genomes from Mixotrophic and Autotrophic Species Provide Insights into Heterotrophy Evolution in Neottieae Orchids
| Autor: | Maria D. Logacheva, Ekaterina Zheleznaia, Michał May, Marie-Christine Le Paslier, Marc-André Selosse, Etienne Delannoy, Isabelle Le Clainche, Marcin Jakalski, Félix Lallemand, Aurélie Bérard |
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| Přispěvatelé: | Institut de Systématique, Evolution, Biodiversité (ISYEB ), Muséum national d'Histoire naturelle (MNHN)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Institute for Information Transmission Problems, Russian Academy of Sciences [Moscow] (RAS), Skolkovo Institute of Science and Technology [Moscow] (Skoltech), Etude du Polymorphisme des Génomes Végétaux (EPGV), Institut National de la Recherche Agronomique (INRA), People's Friendship University of Russia [Moscow], University of Gdańsk (UG), Institut des Sciences des Plantes de Paris-Saclay (IPS2 (UMR_9213 / UMR_1403)), Institut National de la Recherche Agronomique (INRA)-Université Paris-Sud - Paris 11 (UP11)-Université Paris Diderot - Paris 7 (UPD7)-Université d'Évry-Val-d'Essonne (UEVE)-Centre National de la Recherche Scientifique (CNRS), Muséum national d'Histoire naturelle (MNHN)-École pratique des hautes études (EPHE)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), University of Gdańsk, Institut National de la Recherche Agronomique (INRA)-Université d'Évry-Val-d'Essonne (UEVE)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris-Saclay-Université Paris-Sud - Paris 11 (UP11), Muséum national d'Histoire naturelle (MNHN)-École Pratique des Hautes Études (EPHE), Lallemand, Félix |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Letter DNA Plant [SDV]Life Sciences [q-bio] Genome Plastid phylogeny 010603 evolutionary biology 01 natural sciences Genome Neottieae 03 medical and health sciences mycoheterotrophy Symbiosis mixotrophy Phylogenetics phylogénie Genetics Autotroph Plastid mycorrhizae Orchidaceae Ecology Evolution Behavior and Systematics 030304 developmental biology 0303 health sciences Autotrophic Processes Phylogenetic tree biology food and beverages Mycorrhiza plastome Heterotrophic Processes 15. Life on land biology.organism_classification Biological Evolution mixotrophie Chloroplast DNA Evolutionary biology |
| Zdroj: | Genome Biology and Evolution Genome Biology and Evolution, Society for Molecular Biology and Evolution, 2019, 11 (9), pp.2457-2467. ⟨10.1093/gbe/evz170⟩ Genome Biology and Evolution, 2019, 11 (9), pp.2457-2467. ⟨10.1093/gbe/evz170⟩ Genome Biology and Evolution, 1-37. (2019) |
| ISSN: | 1759-6653 |
| DOI: | 10.1093/gbe/evz170⟩ |
| Popis: | Mixotrophic species use both organic and mineral carbon sources. Some mixotrophic plants combine photosynthesis and a nutrition called mycoheterotrophy, where carbon is obtained from fungi forming mycorrhizal symbiosis with their roots. These species can lose photosynthetic abilities and evolve full mycoheterotrophy. Besides morphological changes, the latter transition is associated with a deep alteration of the plastid genome. Photosynthesis-related genes are lost first, followed by housekeeping genes, eventually resulting in a highly reduced genome. Whether relaxation of selective constraints already occurs for the plastid genome of mixotrophic species, which remain photosynthetic, is unclear. This is partly due to the difficulty of comparing plastid genomes of autotrophic, mixotrophic, and mycoheterotrophic species in a narrow phylogenetic framework. We address this question in the orchid tribe Neottieae, where this large assortment of nutrition types occurs. We sequenced 13 new plastid genomes, including 9 mixotrophic species and covering all 6 Neottieae genera. We investigated selective pressure on plastid genes in each nutrition type and conducted a phylogenetic inference of the group. Surprisingly, photosynthesis-related genes did not experience selection relaxation in mixotrophic species compared with autotrophic relatives. Conversely, we observed evidence for selection intensification for some plastid genes. Photosynthesis is thus still under purifying selection, maybe because of its role in fruit formation and thus reproductive success. Phylogenetic analysis resolved most relationships, but short branches at the base of the tree suggest an evolutionary radiation at the beginning of Neottieae history, which, we hypothesize, may be linked to mixotrophy emergence. |
| Databáze: | OpenAIRE |
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