Living Beings

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    Source-identified Saccharolobus solfataricus; Source-identified documentary image; see the original file for method and context.

    Saccharolobus solfataricus

    Saccharolobus solfataricus

    Source-identified Aliivibrio fischeri; Source-identified documentary image; see the original file for method and context.

    Aliivibrio fischeri

    Aliivibrio fischeri

    Enerχiv-Biocoating-fig2b-S. solfataricus.jpg · Resized and converted to WebP for display. Source-identified documentary image; see the original file for method and context. Soroush Niazi, Abdolali K. Sadaghiani, Ghazaleh Gharib, Veysel Ogulcan Kaya, Süleyman Çelik, Özlem Kutlu, Ali Koşar · CC BY 4.0

    Aliivibrio Fischeri.jpg · Resized and converted to WebP for display. Source-identified documentary image; see the original file for method and context. Seltersberg · CC BY 4.0

    Evidence from the profiles

    Compare their characteristics

    TraitSaccharolobus solfataricusAliivibrio fischeri
    Physical traitsSmall, irregular cells are studied through microscopy and molecular methods. A protein structure from this species is not a photograph of the organism.Small bacterial cells require microscopy for direct observation. Light emission is a physiological property, not a visible body-color diagnosis.
    Habitat and rangeHot, acidic terrestrial environments provide its characteristic setting, reproduced selectively in laboratory culture.Marine environmental phases and specialized host-associated sites provide distinct growth conditions.
    Diet and nutritionThe reference genome encodes systems for sugar, protein and sulfur-related metabolism, reflecting several potential resource-use pathways.Organic substrates support metabolism. Conditions inside a host can differ substantially from those in surrounding seawater.
    Behavior and activityTransport and sensory systems connect cellular activity to environmental resources. Mobile genetic elements contribute to genome variation.Chemical signaling and population context influence light production and other behaviors relevant to colonization.
    Reproduction and life cycleReplication, genome maintenance and cell division support culture growth. The P2 genome contains numerous mobile elements.Cell multiplication and repeated opportunities for host colonization connect free-living and symbiotic phases.
    Geographic distributionThe reference strain has a documented geothermal origin. Laboratory use across countries is not a map of natural populations.Environmental and host-derived strains have documented collection localities. The origin of one experimental strain does not define the full range.
    Ecological roleIts physiology contributes to the diversity of microorganisms inhabiting acidic geothermal environments.The well-studied squid association demonstrates a microbial contribution to an animal's light-producing system.
    Distinctive adaptationsThe P2 genome study found abundant mobile genetic elements and many transport, protease and sugar-metabolism genes. This documents a flexible genomic and metabolic repertoire in an identified research strain. The original paper used Sulfolobus solfataricus; later taxonomic work transferred the species to Saccharolobus, so both names occur in its scientific literature.Bioluminescence, environmental sensing and colonization traits help explain the model symbiosis.

    Classification

    Shared ancestry

    Closest shared taxon: cellular organisms.

    1. LifeLife
    domainArchaeakingdomThermoproteatiphylumThermoproteotaclassThermoproteiorderSulfolobalesfamilySulfolobaceaegenusSaccharolobusspeciesSaccharolobus solfataricus
    domainBacteriakingdomPseudomonadatiphylumPseudomonadotaclassGammaproteobacteriaorderVibrionalesfamilyVibrionaceaegenusAliivibriospeciesAliivibrio fischeri
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