Between a Pod and a Hard Test: The Deep Evolution of Amoebae

0479271 - BC 2018 RIV US eng J - Journal Article
Kang, S. - Tice, A. K. - Spiegel, F. W. - Silberman, J. D. - Pánek, T. - Čepička, I. - Kostka, Martin - Kosakyan, A. - Alcantara, D. M. C. - Roger, A. J. - Shadwick, L. - Smirnov, A. - Kudryavtsev, A. - Lahr, D. J. G. - Brown, M. W.
Between a Pod and a Hard Test: The Deep Evolution of Amoebae.
Molecular Biology and Evolution. Roč. 34, č. 9 (2017), s. 2258-2270. ISSN 0737-4038. E-ISSN 1537-1719
Institutional support: RVO:60077344
Keywords : phylogenomics * transcriptomes * Amoebozoa * reductive evolution * phylotranscriptomics
OECD category: Biology (theoretical, mathematical, thermal, cryobiology, biological rhythm), Evolutionary biology
Impact factor: 10.217, year: 2017

Amoebozoa is the eukaryotic supergroup sister to Obazoa, the lineage that contains the animals and Fungi, as well as their protistan relatives, and the breviate and apusomonad flagellates. Amoebozoa is extraordinarily diverse, encompassing important model organisms and significant pathogens. Although amoebozoans are integral to global nutrient cycles and present in nearly all environments, they remain vastly understudied. We present a robust phylogeny of Amoebozoa based on broad representative set of taxa in a phylogenomic framework (325 genes). By sampling 61 taxa using culture-based and single-cell transcriptomics, our analyses show two major clades of Amoebozoa, Discosea, and Tevosa. This phylogeny refutes previous studies in major respects. Our results support the hypothesis that the last common ancestor of Amoebozoa was sexual and flagellated, it also may have had the ability to disperse propagules from a sporocarp-type fruiting body. Overall, the main macroevolutionary patterns in Amoebozoa appear to result from the parallel losses of homologous characters of a multiphase life cycle that included flagella, sex, and sporocarps rather than independent acquisition of convergent features.
Permanent Link: http://hdl.handle.net/11104/0275274