Plastid phylogenomics with broad taxon sampling further elucidates the distinct evolutionary origins and timing of secondary green plastids

Jackson, Christopher, Knoll, Andrew H, Chan, Cheong Xin and Verbruggen, Heroen (2018) Plastid phylogenomics with broad taxon sampling further elucidates the distinct evolutionary origins and timing of secondary green plastids. Scientific reports, 8 1: 1523. doi:10.1038/s41598-017-18805-w


Author Jackson, Christopher
Knoll, Andrew H
Chan, Cheong Xin
Verbruggen, Heroen
Title Plastid phylogenomics with broad taxon sampling further elucidates the distinct evolutionary origins and timing of secondary green plastids
Journal name Scientific reports   Check publisher's open access policy
ISSN 2045-2322
Publication date 2018-01-24
Year available 2018
Sub-type Article (original research)
DOI 10.1038/s41598-017-18805-w
Open Access Status DOI
Volume 8
Issue 1
Start page 1523
Total pages 10
Place of publication LONDON
Publisher Nature Publishing Group
Language eng
Subject 1000 General
Abstract Secondary plastids derived from green algae occur in chlorarachniophytes, photosynthetic euglenophytes, and the dinoflagellate genus Lepidodinium. Recent advances in understanding the origin of these plastids have been made, but analyses suffer from relatively sparse taxon sampling within the green algal groups to which they are related. In this study we aim to derive new insights into the identity of the plastid donors, and when in geological time the independent endosymbiosis events occurred. We use newly sequenced green algal chloroplast genomes from carefully chosen lineages potentially related to chlorarachniophyte and Lepidodinium plastids, combined with recently published chloroplast genomes, to present taxon-rich phylogenetic analyses to further pinpoint plastid origins. We integrate phylogenies with fossil information and relaxed molecular clock analyses. Our results indicate that the chlorarachniophyte plastid may originate from a precusor of siphonous green algae or a closely related lineage, whereas the Lepidodinium plastid originated from a pedinophyte. The euglenophyte plastid putatively originated from a lineage of prasinophytes within the order Pyramimonadales. Our molecular clock analyses narrow in on the likely timing of the secondary endosymbiosis events, suggesting that the event leading to Lepidodinium likely occurred more recently than those leading to the chlorarachniophyte and photosynthetic euglenophyte lineages.
Keyword Dinoflagellate Lepidodinium-Chlorophorum
Chloroplast Genome
Phylogenetic Reconstruction
Lotharella-Vacuolata
Bryopsis-Plumosa
Algae
Diversification
Sequences
Rdna
Nov
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID FT110100585
UOM0007
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Pubmed Import
 
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Created: Wed, 31 Jan 2018, 12:09:30 EST