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Marcelino, Vanessa R.; Cremen, Ma Chiela M.; Jackson, Chistopher J.; Larkum, Anthony A. W.; Verbruggen, Heroen. |
Some photosynthetic organisms live in extremely low light environments. Light limitation is associated with selective forces as well as reduced exposure to mutagens, and over evolutionary timescales it can leave a footprint on species' genomes. Here, we present the chloroplast genomes of four green algae (Bryopsidales, Ulvophyceae), including the endolithic (limestone-boring) alga Ostreobium quekettii, which is a low light specialist. We use phylogenetic models and comparative genomic tools to investigate whether the chloroplast genome of Ostreobium corresponds to our expectations of how low light would affect genome evolution. Ostreobium has the smallest and most gene-dense chloroplast genome among Ulvophyceae reported to date, matching our expectation... |
Tipo: Text |
Palavras-chave: Genome streamlining; Photosynthesis; Rates of evolution; Boring algae; Stoichiogenomics. |
Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00659/77094/78418.pdf |
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Verbruggen, Heroen; Marcelino, Vanessa R.; Guiry, Michael D.; Cremen, Ma. Chiela M.; Jackson, Christopher J.. |
The green algal genus Ostreobium is an important symbiont of corals, playing roles in reef decalcification and providing photosynthates to the coral during bleaching events. A chloroplast genome of a cultured strain of Ostreobium was available, but low taxon sampling and Ostreobium's early-branching nature left doubt about its phylogenetic position. Here, we generate and describe chloroplast genomes from four Ostreobium strains as well as Avrainvillea mazei and Neomeris sp., strategically sampled earlybranching lineages in the Bryopsidales and Dasycladales respectively. At 80,584 bp, the chloroplast genome of Ostreobium sp. HV05042 is the most compact yet found in the Ulvophyceae. The Avrainvillea chloroplast genome is similar to 94 kbp and contains... |
Tipo: Text |
Palavras-chave: Bryopsidales; Chloroplast genome; Coral symbiosis; Dasycladales; Molecular phylogenetics; Ostreobium; Phylogenomics. |
Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00659/77091/78412.pdf |
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