Irisarri, Iker

[["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Nature Communications"],["dc.bibliographiccitation.volume","12"],["dc.contributor.author","Strassert, Jürgen F. H."],["dc.contributor.author","Irisarri, Iker"],["dc.contributor.author","Williams, Tom A."],["dc.contributor.author","Burki, Fabien"],["dc.date.accessioned","2021-06-01T09:41:39Z"],["dc.date.available","2021-06-01T09:41:39Z"],["dc.date.issued","2021"],["dc.description.abstract","Abstract In modern oceans, eukaryotic phytoplankton is dominated by lineages with red algal-derived plastids such as diatoms, dinoflagellates, and coccolithophores. Despite the ecological importance of these groups and many others representing a huge diversity of forms and lifestyles, we still lack a comprehensive understanding of their evolution and how they obtained their plastids. New hypotheses have emerged to explain the acquisition of red algal-derived plastids by serial endosymbiosis, but the chronology of these putative independent plastid acquisitions remains untested. Here, we establish a timeframe for the origin of red algal-derived plastids under scenarios of serial endosymbiosis, using Bayesian molecular clock analyses applied on a phylogenomic dataset with broad sampling of eukaryote diversity. We find that the hypotheses of serial endosymbiosis are chronologically possible, as the stem lineages of all red plastid-containing groups overlap in time. This period in the Meso- and Neoproterozoic Eras set the stage for the later expansion to dominance of red algal-derived primary production in the contemporary oceans, which profoundly altered the global geochemical and ecological conditions of the Earth."],["dc.identifier.doi","10.1038/s41467-021-22044-z"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/84995"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-425"],["dc.relation.eissn","2041-1723"],["dc.title","A molecular timescale for eukaryote evolution with implications for the origin of red algal-derived plastids"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","105"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Systematic Biology"],["dc.bibliographiccitation.lastpage","120"],["dc.bibliographiccitation.volume","71"],["dc.contributor.author","Irisarri, Iker"],["dc.contributor.author","Strassert, Jürgen F H"],["dc.contributor.author","Burki, Fabien"],["dc.contributor.editor","Folk, Ryan"],["dc.date.accessioned","2022-04-01T10:00:31Z"],["dc.date.available","2022-04-01T10:00:31Z"],["dc.date.issued","2021"],["dc.description.abstract","Abstract The origin of plastids was a major evolutionary event that paved the way for an astonishing diversification of photosynthetic eukaryotes. Plastids originated by endosymbiosis between a heterotrophic eukaryotic host and cyanobacteria, presumably in a common ancestor of the primary photosynthetic eukaryotes (Archaeplastida). A single origin of primary plastids is well supported by plastid evidence but not by nuclear phylogenomic analyses, which have consistently failed to recover the monophyly of Archaeplastida hosts. Importantly, plastid monophyly and nonmonophyletic hosts could be explained under scenarios of independent or serial eukaryote-to-eukaryote endosymbioses. Here, we assessed the strength of the signal for the monophyly of Archaeplastida hosts in four available phylogenomic data sets. The effect of phylogenetic methodology, data quality, alignment trimming strategy, gene and taxon sampling, and the presence of outlier genes were investigated. Our analyses revealed a lack of support for host monophyly in the shorter individual data sets. However, when analyzed together under rigorous data curation and complex mixture models, the combined nuclear data sets supported the monophyly of primary photosynthetic eukaryotes (Archaeplastida) and recovered a putative association with plastid-lacking Picozoa. This study represents an important step toward better understanding deep eukaryotic evolution and the origin of plastids. [Archaeplastida; Bayesian; chloroplast; maximum likelihood; mixture model; ortholog; outlier loci; paralog; protist.]"],["dc.identifier.doi","10.1093/sysbio/syab036"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/105450"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-530"],["dc.relation.eissn","1076-836X"],["dc.relation.issn","1063-5157"],["dc.title","Phylogenomic Insights into the Origin of Primary Plastids"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]