Examinando por Autor "Lavin, Paris"

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    Complete genome sequence of Cellulomonas sp. strain ATA003
    (American Society For Microbiology, 2024) Bartholomäus, Alexander; Mitzscherling, Julia; Lipus, Daniel; Wagner, Dirk; Lavin, Paris ; Contreras, Roberto ; Oses, Rómulo
    The Gram-positive, rod-shaped endophytic bacterium Cellulomonas sp.strain ATA003 was isolated from the endemic cactus Maihueniopsis domeykoensis seeds collected in the Coastal Atacama Desert, Chile. Here, we present a circular genome with a size of 4,084,881 bp and a GC content of 73.8% obtained by Nanopore sequencing.
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    First screening of bacteria assemblages associated with the marine polychaete Melinna palmata Grube, 1870 and adjacent sediments
    (Frontiers Media SA, 2024) Menabit, Selma ; Lavin, Paris ; Begun, Tatiana ; Mihaela Mureșan ; Teacӑ, Adrian; Purcarea, Cristina
    Bacteria associated with marine invertebrate play a fundamental role in the biology, ecology, development and evolution of their hosts. Although many studies have been focused on the microbial populations of benthic and pelagic habitats, little is known about bacteria colonizing tube-dwelling polychaete. In this context, the current study provided the first characterization of the Melinna palmata Grube, 1870 microbiome based on Illumina sequencing of 16S rRNA gene of the polychaete tissue and proximate sediments collected from the Black Sea, Romania, along a 24.2 m - 45.4 m depth-gradient. The diversity, taxonomic composition and deduced functional profile of the tissue and sediments associated bacterial communities were compared and analyzed in relation with the environmental parameters. This polychaete harbored a distinct bacterial assemblage as compared to their sediments and independent on the depth of their habitat, including 8 phyla in tissues dominated by Proteobacteria, and 12 phyla in sediments majorly represented by Actinobacteriota, respectively. At order level, Synechococcales, Rhodobacterales and Actinomarinales were highly represented in the M. palmata microbiome, while Microtrichales, Anaerolineales and Caldilineales were mostly found in sediments. A significant correlation was observed between Cyanobacteria taxa and the dissolved oxygen concentrations in shallow waters impacted by the Danube inputs. Meanwhile, this phylum showed a positive correlation with Planctomycetota colonizing the invertebrate tissues, and a negative one with Actinobacteriota and Chloroflexi found in sediments. The deduced functional profile of these bacterial assemblages suggested the prevalence of the amino acid and carbohydrate metabolism for both analyzed matrices. This pioneering report on the M. palmata microbiome highlighted the environment contribution to bacterial species enrichment of the polychaete, and provided a glimpse on the putative role of microbial communities associated with this marine organism.
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    Organ-specific bacterial communities of the soft-shell clam Mya arenaria (Linnaeus, 1758) and adjacent sediments in the Black Sea
    (Frontiers Media SA, 2025) Menabit, Selma; Lavin, Paris; Begun, Tatiana; Teaca, Adrian; Muresan, Mihaela; Purcarea, Cristina
    Bacteria colonizing bivalves play a critical role in host health by supporting digestion, nutrient cycling, and immune defense. While the microbiomes of marine bivalves have been studied globally, their diversity and functional roles across specific organs remain underexplored. This study investigates the structural and predicted functional diversity of bacterial communities associated with different organs (siphon, gills, and stomach) of the marine bivalve Mya arenaria Linnaeus, 1758, along with the surrounding sediments from the Romanian Black Sea coast, using 16S rRNA gene sequencing with Illumina technology. Bacterial communities within the bivalve differed markedly from those in the sediments and varied across organs. Sediment samples exhibited greater taxonomic diversity (19 phyla) than bivalve organs (14–15 phyla). Verrucomicrobiota dominated the siphon and gills, Spirochaetota were most abundant in the stomach, and Desulfobacterota predominated in sediments. Nitrate-reducing bacteria, particularly those from the genus Persicirhabdus, were prevalent in all organs and may contribute to host resilience under hypoxic conditions. The presence of Sulfurimonas in the stomach suggests a possible nutritional association, while halotolerant Woeseia species identified in sediments likely play a role in environmental nutrient cycling. Predictive functional profiling indicated potential bacterial involvement in various metabolic processes, including carbohydrate, amino acid, and energy metabolism. Additionally, pathways related to xenobiotic degradation and antibiotic biosynthesis were inferred across all sample types, indicating a potential capacity for broader ecological and possibly
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    Patterns of Insect Distribution in Fruit Trees of South Romania and Their Role as Bacterial Vectors
    (MDPI, 2025) Copoiu, Dana S; Lavin, Paris; Itcus, Corina; Purcarea, Cristina
    This study is the first investigation of tree–insect–bacteria interactions in south‑ern Romania, documenting the distribution of 19 insect species across various fruit treesand their insect‑associated bacterial diversity. Insect species were identified through DNAbarcoding, while bacterial communities inAnthomyia,Botanophila,Drosophila, andScapto‑myzainsects were analyzed via 16S rRNA gene sequencing. Insect diversity varied acrossapple, cherry, plum, peach, and quince trees, with most species showing tree‑specific distri‑bution, except forDrosophila melanogaster, which was found on all tree species. Its presencewas primarily influenced by fruit development stages rather than temperature changes.Insect bacterial communities comprised 51 genera across four phyla, predominantlyPseu‑domonadotaandBacillota, that varied by tree species rather than insect species, suggestingthe potential role of these flies as bacterial vectors. Several potential pathogenic bacterialgenera were identified as biomarkers within insect microbiomes, suggesting their involve‑ment in disease transmission, particularly affecting apple and cherry trees. This study alsoprovides the first report of seven insect species in Romania, being the first microbiomecharacterization of four dipteran species associated with regional fruit trees