Antibiotic susceptibility of marine Planctomycetes

et al. 2020

A novel planctomycetal strain, designated ElP T , was isolated from an alga in the shallow hydrothermal vent system close to Panarea Island in the Tyrrhenian Sea. Cells of strain ElP T are spherical, form pink colonies and display typical planctomycetal characteristics including division by budding and presence of crateriform structures. Strain ElP T has a mesophilic (optimum at 30°C) and neutrophilic (optimum at pH 7.5) growth profile, is aerobic and heterotrophic. It reaches a generation time of 29 h (l max = 0.024 h-1). The strain has a genome size of 9.40 Mb with a G ? C content of 71.1% and harbours five plasmids, the highest number observed in the phylum Planctomycetes thus far. Phylogenetically, the strain represents a novel species of the recently described genus Tautonia in the family Isosphaeraceae. A characteristic feature of the strain is its tendency to attach strongly to a range of plastic surfaces. We thus propose the name Tautonia plasticadhaerens sp. nov. for the novel species, represented by the type strain ElP T (DSM 101012 T = LMG 29141 T).

Section: Introductionmentioning

confidence: 99%

Tautonia plasticadhaerens sp. nov., a novel species in the family Isosphaeraceae isolated from an alga in a hydrothermal area of the Eolian Archipelago

Jogler

et al. 2020

“…The observation that, despite slower growth, Planctomycetes can be abundant members in marine microbial communities led to the hypothesis that they apply different strategies to compensate for the disadvantage in growth speed, although most of these stategies remain undiscovered. It has been assumed that these strategies may involve the ability to produce bioactive secondary metabolites (Kallscheuer et al 2019b;Panter et al 2019), the observed resistance against several antibiotics (Cayrou et al 2010;Godinho et al 2019) and/or a metabolism well-adapted to digestion of phototroph-derived compounds, including complex polysaccharides (Wecker et al 2009;Wegner et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Stieleria varia sp. nov., isolated from wood particles in the Baltic Sea, constitutes a novel species in the family Pirellulaceae within the phylum Planctomycetes

Surup

et al. 2020

Species belonging to the bacterial phylum Planctomycetes are ubiquitous members of the microbial communities in aquatic environments and are frequently isolated from various biotic and abiotic surfaces in marine and limnic water bodies. Planctomycetes have large genomes of up to 12.4 Mb, follow complex lifestyles and display an uncommon cell biology; features which motivate the investigation of members of this phylum in greater detail. As a contribution to the current collection of axenic cultures of Planctomycetes, we here describe strain Pla52 T isolated from wood particles in the Baltic Sea. Phylogenetic analysis places the strain in the family Pirellulaceae and suggests two species of the recently described genus Stieleria as current closest neighbours. Strain Pla52n T shows typical features of members of the class Planctomycetia, including division by polar budding and the presence of crateriform structures. Colonies of strain Pla52n T have a light orange colour, which is an unusual

“…members of the 'Roseobacter group' (Frank et al 2014). Underlying mechanisms allowing Planctomycetes to compensate for lower growth rates may include the capability to produce bioactive small molecules (Graça et al 2016;Jeske et al 2016;Kallscheuer et al 2019b), resistance against several antibiotics (Cayrou et al 2010;Godinho et al 2019) and a specialised machinery for the uptake and intracellular digestion of complex polysaccharides. The latter is suspected to be facilitated by unique piliforming crateriform structures and an extremely enlarged periplasmic space (Boedeker et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Caulifigura coniformis gen. nov., sp. nov., a novel member of the family Planctomycetaceae isolated from a red biofilm sampled in a hydrothermal area

Kallscheuer

et al. 2020

Pan44 T , a novel strain belonging to the phylum Planctomycetes, was isolated from a red biofilm in a hydrothermal area close to the island Panarea in the Tyrrhenian Sea north of Sicily, Italy. The strain forms white colonies on solid medium and displays the following characteristics: cell division by budding, formation of rosettes, presence of matrix or fimbriae and long stalks. The cell surface has an interesting and characteristic texture made up of triangles and rectangles, which leads to a pine conelike morphology of the strain. Strain Pan44 T is mesophilic (temperature optimum 26°C), slightly alkaliphilic (pH optimum 8.0), aerobic and heterotrophic. The strain has a genome size of 6.76 Mb with a G ? C content of 63.2%. Phylogenetically, the strain is a member of the family Planctomycetaceae, order Planctomycetales, class Planctomycetia. Our analysis supports delineation of strain Pan44 T from all known genera in this family, hence, we propose to assign it to a novel species within a novel genus, for which we propose the name Caulifigura coniformis gen. nov., sp. nov., represented by Pan44 T (DSM 29405 T = LMG 29788 T) as the type strain.