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Still, relatively little is known about phototrophic potential and strategies of environmental bacteria beyond cyanobacteria. This study explores the phototrophy related genomic diversity of\n                    <jats:italic>Sphingomonas faeni<\/jats:italic>\n                    strains from boreal, sub-arctic and arctic regions. We analyzed the genomes of 25 plant-associated\n                    <jats:italic>S. faeni<\/jats:italic>\n                    strains isolated from\n                    <jats:italic>Vaccinium myrtillus<\/jats:italic>\n                    ,\n                    <jats:italic>Oxyria digyna<\/jats:italic>\n                    ,\n                    <jats:italic>V. vitis-idaea<\/jats:italic>\n                    , and\n                    <jats:italic>Bistorta vivipara<\/jats:italic>\n                    , along with a reference\n                    <jats:italic>S. faeni<\/jats:italic>\n                    genome MA-Olki. The strains showed diversity both in overall genome level but also in phototrophic capabilities: Seven strains were identified as aerobic anoxygenic phototrophic bacteria with a complete photosynthesis gene cluster, 16 strains contained xanthorhodopsin genes, and three strains were non-phototrophic, possessing no aerobic anoxygenic phototrophic or xanthorhodopsin genes. Aerobic anoxygenic phototrophic strains were found exclusively in\n                    <jats:italic>Vaccinium<\/jats:italic>\n                    hosts.\n                    <jats:italic>O. digyna<\/jats:italic>\n                    contained only xanthorhodopsin containing strains and\n                    <jats:italic>B. vivipara<\/jats:italic>\n                    showed xanthorhodopsin genes and one non-phototrophic strain.\n                    <jats:italic>V. vitis-idaea<\/jats:italic>\n                    hosted strains for all three different phototrophy categories. Phylogenetic analyses showed aerobic anoxygenic phototrophic positive strains forming a tight phylogenetic group. Xanthorhodopsin strains and non-phototrophic strains clustered into three different subgroups. Phototrophic strains had more photoreceptors. Aerobic anoxygenic phototrophic strains encoded two 5-aminolevulinic acid synthase isoenzymes, one from a\n                    <jats:italic>hemT<\/jats:italic>\n                    -like gene within the photosynthesis gene cluster and one from a\n                    <jats:italic>hemA<\/jats:italic>\n                    -like gene elsewhere in the genome. Our genomic analysis reveals substantial diversity in phototrophic potential among strains of a single bacterial species isolated from different host plants, possibly reflecting the distinct environmental cues each strain encountered.\n                  <\/jats:p>","DOI":"10.1007\/s43630-026-00991-0","type":"journal-article","created":{"date-parts":[[2026,9,4]],"date-time":"2026-09-04T08:57:43Z","timestamp":1788512263000},"page":"2307-2321","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Phototrophicity and genomic composition in plant-associated Sphingomonas faeni strains"],"prefix":"10.1007","volume":"25","author":[{"given":"Batuhan","family":"Dogan","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8741-1587","authenticated-orcid":false,"given":"Janne A.","family":"Ihalainen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yonghui","family":"Zeng","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4604-6050","authenticated-orcid":false,"given":"Riitta","family":"Nissinen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,9,4]]},"reference":[{"issue":"5","key":"991_CR1","doi-asserted-by":"publisher","first-page":"381","DOI":"10.1007\/s00300-023-03137-5","volume":"46","author":"SM Holmberg","year":"2023","unstructured":"Holmberg, S. 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