1887

Abstract

Several orange- and yellow-pigmented, halophilic, strictly aerobic, chemoheterotrophic, Gram-negative strains were isolated during investigations of maritime Antarctic habitats, including coastal fast sea-ice brine and algae, crustaceans and quartz stone sublithic cyanobacterial biofilms. Isolates investigated in this study belonged to the marine clade of the family and represented lineages that were either distinct from species with validly published names or appeared to be distinct species within existing genera. A polyphasic taxonomic analysis demonstrated the novelty of these strains, and several new taxa are proposed. Strains from quartz stone sublithic communities were grouped into two new genera designated gen. nov. and gen. nov. The genus included the species sp. nov. (type species; type strain G#7=ACAM 1070=CIP 108525) and sp. nov. (type strain Y4-5=ACAM 1063=CIP 108526). The genus contained a single species designated sp. nov. (type strain P7=ACAM 1064=CIP 108527). A novel bacterial strain isolated from the lake-dwelling, calanoid copepod was given the name gen. nov., sp. nov. (type strain DJ3=ACAM 1055=CIP 108538). Four novel species of the genus were discovered, sp. nov. (type strain APA-1=ACAM 1056=CIP 108533) and sp. nov. (type strain ADA-4=ACAM 1058=CIP 108535), which were isolated from the carapace surfaces of sea-ice algae-feeding amphipods, and sp. nov. (type strain IC164=ACAM 1057=CIP 108536) and sp. nov. (type strain HFD=ACAM 1059=CIP 108534), which were isolated from sea-ice brines. Several other novel species were also isolated from sea-ice samples, including two novel species of the genus , sp. nov. (type strain IC158=ACAM 1054=CIP 108531) and sp. nov. (type strain IC162=ACAM 1053=CIP 108532), as well as three novel species of the genus , sp. nov. (type strain IC157=ACAM 1062=CIP 108530), sp. nov. (type strain IC148=ACAM 1060=CIP 108529) and sp. nov. (type strain IC154=ACAM 1061=CIP 108528).

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2005-07-01
2020-01-28
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vol. , part 4, pp. 1471 - 1486

Photomicrographs showing the cellular morphologies of in early exponential growth phase (marine broth, 24 h, 4 °C) (A) and stationary growth phase (marine broth, 30 days, 4 °C) (B), (marine broth, 7 days, 4 °C) (C), and (marine broth, 24 h, 4 °C) (D). Bar, 10 µm.



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