We present the genome of Roseovarius mucosus strain SMR3, a marine bacterium isolated from the diatom Skeletonema marinoi strain RO5AC sampled from top layer sediments at 14 m depth. Its 4,381,426 bp genome consists of a circular chromosome and two circular plasmids and contains 4,178 coding sequences (CDSs).

Diatoms are a major component of the biological community, serving as the principal primary producers in the food web and sustaining oxygen levels in aquatic environments. Among marine planktonic diatoms, the cosmopolitan Skeletonema costatum is one of the most abundant and widespread species in the world's oceans. Here, we report the basic characteristics of a new diatom-infecting S. costatum ...

Detailed seasonal analyses of phytoplankton assemblages’ composition were performed on long-term datasets (20 years) two oligotrophic Mediterranean lagoons (Diana and Urbino), in order to test if community bloom events patterns rely a basis. Our results highlight similar between the lagoons, but different terms abundances, timing, magnitude occurrence Taxonomic Units, occurrence. Dominant diato...

Microalgae are an untapped source of bioactive compounds with various biotechnological applications. Several species industrially produced and commercialized for the feed or cosmetic industries, however, other applications in functional food pharmaceutical markets can be foreseen. In this study, nine industrial/commercial were evaluated vitro antioxidant, calcium-chelating, anti-tumoral, anti-i...

The study of biotic and abiotic factors their interrelationships is essential in the preservation sustainable marine ecosystems for understanding impact that climate change can have on different species. For instance, phytoplankton are extremely vulnerable to environmental changes thus studying involved important species’ conservation. This work examines relationship between parameters eastern ...

The in vitro total antioxidant assay, total phenolic content, DPPH assay, FRAP assay of the acetone extracts from four centric diatoms (Chaetoceros simplex, Skeletonema costatum, Odontella mobiliensis, Coscinodiscus centralis) and three pennate diatoms (Nitzschia closterium, Pleurosigma angulatum and Navicula sp.) were performed. The centric diatom, O. mobiliensis was found higher amount of phe...

A modified differential filtration was used to measure extracellular release of primary products by natural phytoplankton populations and subsequent incorporation of these products by bacteria. Water samples were incubated with I4C labelled bicarbonate for 6 h and 24 h , respectively. A time course experiment showed that 6 h are sufficient for attaining an approximate isotopic equilibrium betwe...

Synechococcus sp. 1.36 Popp et al. 1998 0.55 20 Timmermans et al. 2005 Pelagomonas calceolata 3.00 Timmermans et al. 2005 0.90 20 Timmermans et al. 2005 Prasinomonas capsulatus 4.00 Timmermans et al. 2005 1.19 20 Timmermans et al. 2005 Katodinium rotundatum 8.84 Verity et al. 1992 2.60 30 Fahnenstiel et al. 1995 Ochromonas minima 4.41 Novarino et al. 1997 1.80 29 Fahnenstiel et al. 1995 Dunalie...

Exopolymeric substances (EPS) isolated from a pure culture of the marine bacterium Marinobacter sp. and the marine diatom Skeletonema costatum (axenic) were partially purified, chemically characterized and used as dissolved organic matter (DOM) for the production of macroaggregates. The role of organic particles such as transparent exopolymeric particles (TEP) and Coomassie stained particles (C...