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Mucisphaera calidilacus gen. nov., sp. nov., a novel planctomycete of the class Phycisphaerae isolated in the shallow sea hydrothermal system of the Lipari Islands
Ist Teil von
Antonie van Leeuwenhoek, 2022-03, Vol.115 (3), p.407-420
Ort / Verlag
Cham: Springer International Publishing
Erscheinungsjahr
2022
Quelle
MEDLINE
Beschreibungen/Notizen
For extending the current collection of axenic cultures of planctomycetes, we describe in this study the isolation and characterisation of strain Pan265
T
obtained from a red biofilm in the hydrothermal vent system close to the Lipari Islands in the Tyrrhenian Sea, north of Sicily, Italy. The strain forms light pink colonies on solid medium and grows as a viscous colloid in liquid culture, likely as the result of formation of a dense extracellular matrix observed during electron microscopy. Cells of the novel isolate are spherical, motile and divide by binary fission. Strain Pan265
T
is mesophilic (temperature optimum 30–33 °C), neutrophilic (pH optimum 7.0–8.0), aerobic and heterotrophic. The strain has a genome size of 3.49 Mb and a DNA G + C content of 63.9%. Phylogenetically, the strain belongs to the family
Phycisphaeraceae
, order
Phycisphaerales
, class
Phycisphaerae
. Our polyphasic analysis supports the delineation of strain Pan265
T
from the known genera in this family. Therefore, we conclude to assign strain Pan265
T
to a novel species within a novel genus, for which we propose the name
Mucisphaera calidilacus
gen. nov., sp. nov. The novel species is the type species of the novel genus and is represented by strain Pan265
T
(= DSM 100697
T
= CECT 30425
T
) as type strain.