{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T14:59:32Z","timestamp":1790693972869,"version":"4.1.0"},"reference-count":47,"publisher":"Microbiology Society","issue":"9","license":[{"start":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T00:00:00Z","timestamp":1790640000000},"content-version":"unspecified","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"JSPS KAKENHI","award":["15K07523, 16H02943"],"award-info":[{"award-number":["15K07523, 16H02943"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,9,29]]},"abstract":"<jats:p>\n                    <jats:italic>Microcystis aeruginosa<\/jats:italic>\n                    is a bloom-forming cyanobacterium widely distributed in eutrophic freshwater systems. Most strains are blue\u2013green due to the presence of the photosynthetic pigments phycocyanin and chlorophyll\n                    <jats:italic>a<\/jats:italic>\n                    . Less commonly, brownish strains have been reported, reflecting the presence of the red pigment phycoerythrin (PE). However, the genomic basis, phylogeny and evolutionary origin of PE pigmentation in\n                    <jats:italic>M. aeruginosa<\/jats:italic>\n                    remain poorly understood. Here, we characterized PE-containing\n                    <jats:italic>M. aeruginosa<\/jats:italic>\n                    strains, including six newly sequenced genomes. All genomes harboured putative PE synthesis and regulatory genes (the\n                    <jats:italic>cpe<\/jats:italic>\n                    cluster). Phylogenomic analysis further revealed that these PE-containing strains are distributed across three distinct phylogenetic groups. In contrast, the genomic organization of the\n                    <jats:italic>cpe<\/jats:italic>\n                    cluster was largely conserved. Spectroscopic analyses further indicated that strains belonging to different phylogenetic groups exhibit the same type of chromatic acclimation. Moreover, the phylogenetic relationships inferred for each PE gene were congruent and consistent with the whole-genome phylogeny. Our findings support a single origin of PE genes, with the observed distribution best explained by two independent horizontal transfer events rather than repeated gene loss during intraspecific diversification in\n                    <jats:italic>M. aeruginosa<\/jats:italic>\n                    .\n                  <\/jats:p>","DOI":"10.1099\/mgen.0.001852","type":"journal-article","created":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T14:29:53Z","timestamp":1790692193000},"source":"Crossref","is-referenced-by-count":0,"title":["Phylogenomic diversity and chromatic acclimation in phycoerythrin-containing Microcystis aeruginosa"],"prefix":"10.1099","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0841-4569","authenticated-orcid":false,"given":"Yuuhiko","family":"Tanabe","sequence":"first","affiliation":[{"name":"Biodiversity Division, National Institute for Environmental Studies, Tsukuba, 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