Roseobacter

In taxonomy, Roseobacter is a genus of the Rhodobacteraceae. The Roseobacter clade falls within the {alpha}-3 subclass of the class Alphaproteobacteria. The first strain descriptions appeared in 1991 which described members Roseobacter litoralis and Roseobacter denitrificans, both pink-pigmented bacteriochlorophyll a-producing strains isolated from marine algae. The role members of the Roseobacter lineage play in marine biogeochemical cycles and climate change cannot be overestimated. Roseobacters make up 25% of coastal marine bacteria and members of this lineage process a significant portion of the total carbon in the marine environment. Roseobacter clade plays an important role in global carbon,sulphur cycle. It can also degrade aromatic compounds, uptake trace metal, and form symbiotic relationship. In term of its application, Roseobacter clade produce bioactive compounds, has been used widely in aquaculture, quorum sensing. Roseobacter is one of the most abundant and versatile microorganisms in the ocean. They are diversified across different types of marine habitats: from coastal to open oceans and from sea ice to sea floor. They make up around 25% of marine communities. During algal blooms, 20-30% of the prokaryotic community are Roseobacter. Members of Roseobacter clade display diverse physiologies, and are commonly found to be either free living, particle associated, or in commensal relationships with marine phytoplankton, invertebrates, and vertebrates. Roseobacter are similar with phytoplankton in ways of living. Both of them colonize surface, scavenge iron and produce bioactive secondary metabolites.