Description of Kribbella italica sp. nov., isolated from a Roman catacomb

Everest, Gareth J.; Curtis, Sarah M.; Leo, Filomena De; Urzı̀, Clara; Meyers, Paul R.

doi:10.1099/ijs.0.070672-0

Cited by 14 publications

(2 citation statements)

References 23 publications

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“…Otherwise, in the darkness, white biofilms of different consistency and origin were found [ 16 , 25 , 47 , 48 ]. In all cases, a high diversity of heterotrophic microflora was recorded, and several new bacterial species were described [ 49 , 50 , 51 , 52 , 53 , 54 ], confirming that the unexplored and/or extreme niches are reservoirs for unknown entities [ 5 , 55 , 56 , 57 , 58 ].…”

Section: Introductionmentioning

confidence: 83%

The Roman Houses of the Caelian Hill (Rome, Italy): Multitemporal Evaluation of Biodeterioration Patterns

et al. 2023

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Like other hypogeal environments, the Roman Houses of the Caelian Hill are prone to unwanted biological growth. Wide conservative interventions have been carried out at the beginning of this millenium to reduce biodeterioration and physical–chemical damages. Retracing the last monitoring work, we assessed the site’s current state of conservation and biodeterioration intending to check the previous treatments’ effectiveness and deepen the common knowledge of the subterranean biota and their possible biodeteriogenic effects. Starting from the past test areas and the previous identifications of the occurring biodeteriogens, we further isolated and identified the main eubacterial, fungal, and phototrophic settlers, focusing on some detrimental traits for wall paintings (i.e., acid production and carbonate precipitation). The achieved results proved the success of the performed interventions in reducing the wall’s water content. Otherwise, the new conditions raise, in the long term, new concerns about lampenflora, carbonate precipitations, and salt efflorescence. Here, the Caelian Houses’ new status is documented. The possible favouring conditions for the different groups of biodeteriogens, along with the taxonomical novelties, additional risks tied to the anthropization of the resident culturable microbial community, and the possible relation between the black fungus Cyphellophora olivacea and roots, are reported and discussed.

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Section: Introductionmentioning

confidence: 83%

The Roman Houses of the Caelian Hill (Rome, Italy): Multitemporal Evaluation of Biodeterioration Patterns

et al. 2023

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“…In general, actinomycetes isolated from the pine forest were the most proficient in synthesising PGP-metabolites, as shown by five isolates that were most active in producing ammonia, namely S. pinistramenti SF28 T , strains close to the type strains of S celluloflavus and S. sanglieri and ones considered to be members of presumptive novel species of Streptacidiphilus and Streptomyces . Isolates 1HA1 and 5R2A3, near relatives of Kribbella italica ( Everest et al, 2015 ) and Micromonospora acroterricola ( Carro et al, 2019 ), respectively, were particularly gifted in their ability to produce IAA, as was isolate SA8, another close relative of S. sanglieri .…”

Section: Discussionmentioning

confidence: 99%

Generation of a high quality library of bioactive filamentous actinomycetes from extreme biomes using a culture-based bioprospecting strategy

2023

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IntroductionFilamentous actinomycetes, notably members of the genus Streptomyces, remain a rich source of new specialized metabolites, especially antibiotics. In addition, they are also a valuable source of anticancer and biocontrol agents, biofertilizers, enzymes, immunosuppressive drugs and other biologically active compounds. The new natural products needed for such purposes are now being sought from extreme habitats where harsh environmental conditions select for novel strains with distinctive features, notably an ability to produce specialized metabolites of biotechnological value.MethodsA culture-based bioprospecting strategy was used to isolate and screen filamentous actinomycetes from three poorly studied extreme biomes. Actinomycetes representing different colony types growing on selective media inoculated with environmental suspensions prepared from high-altitude, hyper-arid Atacama Desert soils, a saline soil from India and from a Polish pine forest soil were assigned to taxonomically predictive groups based on characteristic pigments formed on oatmeal agar. One hundred and fifteen representatives of the colour-groups were identified based on 16S rRNA gene sequences to determine whether they belonged to validly named or to putatively novel species. The antimicrobial activity of these isolates was determined using a standard plate assay. They were also tested for their capacity to produce hydrolytic enzymes and compounds known to promote plant growth while representative strains from the pine forest sites were examined to determine their ability to inhibit the growth of fungal and oomycete plant pathogens.ResultsComparative 16S rRNA gene sequencing analyses on isolates representing the colour-groups and their immediate phylogenetic neighbours showed that most belonged to either rare or novel species that belong to twelve genera. Representative isolates from the three extreme biomes showed different patterns of taxonomic diversity and characteristic bioactivity profiles. Many of the isolates produced bioactive compounds that inhibited the growth of one or more strains from a panel of nine wild strains in standard antimicrobial assays and are known to promote plant growth. Actinomycetes from the litter and mineral horizons of the pine forest, including acidotolerant and acidophilic strains belonging to the genera Actinacidiphila,Streptacidiphilus and Streptomyces, showed a remarkable ability to inhibit the growth of diverse fungal and oomycete plant pathogens.DiscussionIt can be concluded that selective isolation and characterization of dereplicated filamentous actinomyctes from several extreme biomes is a practical way of generating high quality actinomycete strain libraries for agricultural, industrial and medical biotechnology.

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Kribbella

Meyers¹

2021

Bergey's Manual of Systematics of Archaea and Bacteria

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Krib.bel'la. N.L. fem. dim. n. Kribbella arbitrary name formed from the acronym for the Korea Research Institute of Bioscience and Biotechnology (KRIBB) where taxonomic studies on this taxon were first performed. Actinobacteria / Actinobacteria / Propionibacteriales / Kribbellaceae / Kribbella DNA G + C content ( mol %): 67.0–70.6 (based on 16 type‐strain genome sequences). Type species : Kribbella flavida Park et al. 1999 VP .

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Description of Kribbella italica sp. nov., isolated from a Roman catacomb

Cited by 14 publications

References 23 publications

The Roman Houses of the Caelian Hill (Rome, Italy): Multitemporal Evaluation of Biodeterioration Patterns

The Roman Houses of the Caelian Hill (Rome, Italy): Multitemporal Evaluation of Biodeterioration Patterns

Generation of a high quality library of bioactive filamentous actinomycetes from extreme biomes using a culture-based bioprospecting strategy

Kribbella

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