64 documents found, page 1 of 7
Marine Sponge and Octocoral-Associated Bacteria Show Versatile Secondary Metabo...
Almeida, João F; Marques, Matilde S.; Oliveira, Vanessa; Egas, Conceição; Mil-Homens, Dalila; Viana, Romeu; Cleary, Daniel F. R.; Huang, Yusheng MMarine microbiomes are prolific sources of bioactive natural products of potential pharmaceutical value. This study inspected two culture collections comprising 919 host-associated marine bacteria belonging to 55 genera and several thus-far unclassified lineages to identify isolates with potentially rich secondary metabolism and antimicrobial activities. Seventy representative isolates had their genomes mined f...
Bacterioplankton community shifts during a spring bloom of Aphanizomenon gracil...
de Figueiredo, Daniela R. de; Lopes, Ana R.; Pereira, Mário J.; Polónia, Ana R. M.; Castro, Bruno B.; Gonçalves, Fernando; Gomes, Newton C. M.Climate change is enhancing the frequency of cyanobacterial blooms not only during summer but also in spring and autumn, leading to increased ecological impacts. The bacterioplankton community composition (BCC), in particular, is deeply affected by these blooms, although at the same time BCC can also play important roles in blooms’ dynamics. However, more information is still needed regarding BCC during species...
Bacterioplankton Community Shifts during a Spring Bloom of Aphanizomenon gracil...
de Figueiredo, Daniela R.; Lopes, Ana R.; Pereira, Mário J.; Polónia, Ana R. M.; Castro, Bruno B.; Gonçalves, Fernando; Gomes, Newton C. M.Climate change is enhancing the frequency of cyanobacterial blooms not only during summer but also in spring and autumn, leading to increased ecological impacts. The bacterioplankton community composition (BCC), in particular, is deeply affected by these blooms, although at the same time BCC can also play important roles in blooms’ dynamics. However, more information is still needed regarding BCC during species...
Marine sponge and octocoral-associated bacteria show versatile secondary metabo...
Almeida, João F.; Marques, Matilde; Oliveira, Vanessa; Egas, Conceição; Mil-Homens, Dalila; Viana, Romeu; Cleary, Daniel F. R.; Huang, Yusheng M.Marine microbiomes are prolific sources of bioactive natural products of potential pharmaceutical value. This study inspected two culture collections comprising 919 host-associated marine bacteria belonging to 55 genera and several thus-far unclassified lineages to identify isolates with potentially rich secondary metabolism and antimicrobial activities. Seventy representative isolates had their genomes mined f...
Assessing the genomic composition, putative ecological relevance and biotechnol...
Oliveira, Vanessa; Polónia, Ana R. M.; Cleary, Daniel F. R.; Huang, Yusheng M.; de Voogd, Nicole J.; Keller-Costa, Tina; Costa, RodrigoPlasmid-mediated transfer of genes can have direct consequences in several biological processes within sponge microbial communities. However, very few studies have attempted genomic and functional characterization of plasmids from marine host-associated microbial communities in general and those of sponges in particular. In the present study, we used an endogenous plasmid isolation method to obtain plasmids fro...
Biosurfactant production in sub-oxic conditions detected in hydrocarbon-degradi...
Domingues, Patrícia M.; Oliveira, Vanessa; Serafim, Luísa Seuanes; Gomes, Newton C. M.; Cunha, ÂngelaHydrocarbon bioremediation in anoxic sediment layers is still challenging not only because it involves metabolic pathways with lower energy yields but also because the production of biosurfactants that contribute to the dispersion of the pollutant is limited by oxygen availability. This work aims at screening populations of culturable hydrocarbonoclastic and biosurfactant (BSF) producing bacteria from deep sub-...
The sponge microbiome within the greater coral reef microbial metacommunity
Cleary, Daniel F. R.; Swierts, Thomas; Coelho, Francisco J. R. C.; Polónia, Ana R. M.; Huang, Yusheng M.; Ferreira, Marina R. S.; Putchakarn, SumaittMuch recent marine microbial research has focused on sponges, but very little is known about how the sponge microbiome fits in the greater coral reef microbial metacommunity. Here, we present an extensive survey of the prokaryote communities of a wide range of biotopes from Indo-Pacific coral reef environments. We find a large variation in operational taxonomic unit (OTU) richness, with algae, chitons, stony co...
The gorgonian coral Eunicella labiata hosts a distinct prokaryotic consortium a...
Keller-Costa, Tina; Eriksson, Dominic; Gonçalves, Jorge Manuel Santos; Gomes, Newton C. M.; Lago-Lestón, Asunción; Costa, RodrigoMicrobial communities inhabiting gorgonian corals are believed to benefit their hosts through nutrient provision and chemical defence; yet much remains to be learned about their phylogenetic uniqueness and cultivability. Here, we determined the prokaryotic community structure and distinctiveness in the gorgonian Eunicella labiata by Illumina sequencing of 16S rRNA genes from gorgonian and seawater metagenomic D...
Effect of chemical stress and ultraviolet radiation in the bacterial communitie...
Oliveira, Jacinta M. M.; Almeida, Ana Rita; Pimentel, Tânia; Andrade, Thayres S.; Henriques, Jorge F.; Soares, Amadeu M. V. M.; Loureiro, SusanaThis study aimed to assess the effect of ultraviolet radiation (UVR) and chemical stress (triclosan-TCS; potassium dichromate-PD; prochloraz-PCZ) on bacterial communities of zebrafish (Danio rerio) embryos (ZEBC). Embryos were exposed to two UVR intensities and two chemical concentrations not causing mortality or any developmental effect (equivalent to the No-Observed-Effect Concentration-NOEC; NOEC diluted by ...
Integrated analysis of bacterial and microeukaryotic communities from different...
Coelho, Francisco J. R. C.; Louvado, Antonio; Domingues, Patricia M.; Cleary, Daniel F. R.; Ferreira, Marina; Almeida, Adelaide; Cunha, Marina R.The present study assesses the diversity and composition of sediment bacterial and microeukaryotic communities from deep-sea mud volcanoes (MVs) associated with strike-slip faults in the South-West Iberian Margin (SWIM). We used a 16S/18S rRNA gene based pyrosequencing approach to characterize and correlate the sediment bacterial and microeukaryotic communities from MVs with differing gas seep regimes and from ...