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| Autores principales: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Formato: | Artículo científico |
| Lenguaje: | en |
| Publicado: |
Nature communications
2025
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| Materias: | |
| Acceso en línea: | https://pubmed.ncbi.nlm.nih.gov/41022706/ |
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- Genome-resolved biogeography of Phaeocystales, cosmopolitan bloom-forming algae. Füssy, Zoltán Lampe, Robert H Arrigo, Kevin R Barry, Kerrie Brisbin, Margaret M Brussaard, Corina P D Decelle, Johan de Vargas, Colomban DiTullio, Giacomo R Elbourne, Liam D H Frischer, Marc E Goodstein, David M Grigoriev, Igor V Hayes, Richard D Healey, Adam L James, Chase C Jenkins, Jerry W Juery, Caroline Kumar, Manish Kustka, Adam B Maumus, Florian Novák Vanclová, Anna M G Oborník, Miroslav Paulsen, Ian T Probert, Ian Saito, Mak A Schmutz, Jeremy Skalický, Tomáš Tec-Campos, Diego Tomelka, Hannah Věchtová, Pavlína Venepally, Pratap Wilson-Mortier, Brendan Zengler, Karsten Zheng, Hong Allen, Andrew E Phylogeny Haptophyta Phylogeography Gene Transfer, Horizontal Metagenome Oceans and Seas Genome Genomics Phaeocystales, comprising the genus Phaeocystis and an uncharacterized sister lineage, are nanoplanktonic haptophytes widespread in the global ocean. Several species form mucilaginous colonies and influence key biogeochemical cycles, yet their underlying diversity and ecological strategies remain underexplored. Here, we present new genomic data from 13 strains, including three high-quality reference genomes (N50 > 30 kbp), and integrate previous metagenome-assembled genomes to resolve a robust phylogeny. Divergence timing of P. antarctica aligns with Miocene cooling and Southern Ocean isolation. Genomic traits reveal metabolic flexibility, including mixotrophic nitrogen acquisition in temperate waters and gene expansions linked to polar nutrient adaptation. Concordantly, transcriptomic comparisons between temperate and polar Phaeocystis suggest Southern Ocean populations experience iron and B limitation. We also identify signatures of horizontal gene transfer and endogenous giant virus/virophage insertions. Together, these findings highlight Phaeocystales as an ecologically versatile and geographically widespread lineage shaped by evolutionary innovation and adaptation to contrasting environmental stressors.