A5011974137- Microbial Community Ecology and Physiology
- Polar Research and Ecology
- Microbial bioremediation and biosurfactants
- Genomics and Phylogenetic Studies
- Methane Hydrates and Related Phenomena
- Marine Sponges and Natural Products
- Microbial Natural Products and Biosynthesis
- Microplastics and Plastic Pollution
- Marine Biology and Environmental Chemistry
- Bacterial biofilms and quorum sensing
- Protist diversity and phylogeny
- Marine Biology and Ecology Research
- Bacteriophages and microbial interactions
- Pharmaceutical and Antibiotic Environmental Impacts
- Aquaculture disease management and microbiota
- Toxic Organic Pollutants Impact
- Environmental DNA in Biodiversity Studies
- Chromium effects and bioremediation
- Marine and coastal ecosystems
- Climate change and permafrost
- Wastewater Treatment and Nitrogen Removal
- Coral and Marine Ecosystems Studies
- Enzyme Production and Characterization
- Microbial Metabolic Engineering and Bioproduction
- Ocean Acidification Effects and Responses
National Research Council
2016-2025
University of Palermo
2024
National Research Council
2023
University of Messina
2012-2021
Istituto di Scienze Marine del Consiglio Nazionale delle Ricerche
2021
Ca' Foscari University of Venice
2019
Institute for Coastal Marine Environment
2015-2018
ABSTRACT Four sponge-associated Antarctic bacteria (i.e., Winogradskyella sp. strains CAL384 and CAL396, Colwellia strain GW185, Shewanella CAL606) were selected for the highly mucous appearance of their colonies on agar plates. The production extracellular polymeric substances (EPSs) was enhanced by a step-by-step approach, varying carbon source, substrate NaCl concentrations, temperature, pH. EPSs produced under optimal conditions chemically characterized, resulting in moderate...
Abstract Cold environments dominate Earth’s biosphere, hosting complex microbial communities with the ability to thrive at low temperatures. However, underlying molecular mechanisms and metabolic pathways involved in bacterial cold-adaptation are still not fully understood. Herein, we assessed features of Antarctic bacterium Pseudoalteromonas haloplanktis TAC125 (PhTAC125), a model organism for cold-adaptation, both 4 °C 15 °C, by integrating genomic phenomic (high-throughput phenotyping)...
Enormous marine biodiversity offers an endless reservoir of chemicals for many applications. In this scenario, the extraction seaweeds represents interesting source compounds displaying antimicrobial activity. particular, among different red algae, Gracilaria gracilis plays important role due to presence bioactives in its composition. spite these features, efficient culture system is still absent. present study, a novel algal method was developed and compared another more common cultural...
Pseudoalteromonas is a genus of ubiquitous marine bacteria used as model organisms to study the biological mechanisms involved in adaptation cold conditions. A remarkable feature shared by these their ability produce secondary metabolites with strong antimicrobial and antitumor activity. Despite biotechnological relevance, representatives this are still lacking (with few exceptions) an extensive genomic characterization, including features evolution production. Indeed, applications would...
Amidst a global biodiversity crisis1, the word 'biodiversity' has become indispensable for conservation and management2. Yet, is often used as buzzword in scientific literature. Resonant titles of papers claiming to have studied 'global biodiversity' may be promote research focused on few taxonomic groups, habitats, or facets - taxonomic, (phylo)genetic, functional. This usage lead extrapolating results outside target systems these studies with direct consequences our understanding life...
Microbial colonization on plastic polymers has been extensively explored, however the temporal dynamics of biofilm community in Antarctic environments are almost unknown. As a contribute to fill this knowledge gap, structural characteristics and microbial diversity associated with polyvinyl chloride (PVC) polyethylene (PE) panels submerged at 5 m depth collected after 3, 9 12 months were investigated four coastal sites Ross Sea. Additional placed 20 retrieved months. Chemical...
Abstract Five‐hundreds and eighty bacterial strains, isolated from various Antarctic marine sources locations, were screened for antimicrobial activity against terrestrial microorganisms. Twenty‐two isolates (3.8%), mainly retrieved the water column at Terra Nova Bay (Ross Sea), expressed antagonistic one to three indicator organisms. Escherichia coli Proteus mirabilis resulted as more susceptible, followed by Micrococcus luteus Bacillus subtilis . None of inhibited growth Pseudomonas...
The aim of the present work was to characterize heterotrophic bacterial community a marine recirculating aquaculture system (RAS).An experimental RAS sampled for rearing water (RW) and inside biofilter. Samples were analysed abundances, structure composition by using combination culture-dependent -independent techniques. most represented species detected among biofilter clones Pseudomonas stutzeri, while Ruegeria spp. Roseobacter more abundant isolates. In comparison, genera well in both RW...
A polyphasic approach that included PCR-dependent and PCR-independent molecular techniques was applied to analyze the prokaryotic community in surface waters of shallow Antarctic lakes. The situ abundance different bacterial groups determined by fluorescence hybridization, whereas diversity investigated 16S rRNA gene sequencing clones isolates. approaches allowed identification significant microbial components lake bacterioplanktonic communities, indicating a predominance Flavobacterium,...
A set of 146 Antarctic marine isolates from the Ross Sea was characterized by a combination molecular techniques in order to determine degree inter- and intraspecific variability. Isolates were analyzed amplified rDNA restriction analysis (ARDRA) using tetrameric enzyme AluI, resulting 52 different groups, corresponding at least bacterial species, indicating high interspecific The phylogenetic position bacteria belonging some ARDRA groups obtained sequencing 16S rDNA. Random polymorphic DNA...
One hundred and forty bacteria isolated from Antarctic seawater samples were examined for their ability to inhibit the growth of indigenous isolates sensitivity antibacterial activity expressed by one another. On basis 16S rRNA gene sequencing analysis, bacterial assigned five phylogenetically different taxa, Actinobacteria, alpha gamma subclasses Proteobacteria, Bacillaceae, Bacteroidetes. Twenty-one (15%), predominantly exhibited antagonistic properties against marine origin. Members...
The cryosphere is an integral part of the global climate system and one major habitable ecosystems Earth's biosphere. These permanently frozen environments harbor diverse, viable metabolically active microbial populations that represent almost all phylogenetic groups. In this study, we investigated diversity in surface snow surrounding Concordia Research Station on High Antarctic Plateau through a polyphasic approach, including direct prokaryotic quantification by flow cytometry catalyzed...