Changes in Free-Living and Particle-Associated Bacterial Communities Depending on the Growth Phases of Marine Green Algae, Tetraselmis suecica

Bacteria are remarkably associated with the growth of green algae Tetraselmis which used as a feed source in aquaculture, but Tetraselmis-associated bacterial community is characterized insufficiently. Here, first step towards characterization bacteria, we investigated composition free-living (FLB) and particle-associated (PAB) bacteria each phase (lag, exponential, stationary, death) suecica P039 culture using pyrosequencing. The percentage shared operational taxonomic units (OTUs) between FLB PAB communities was substantially high (≥92.4%), their compositions were significantly (p = 0.05) different from other. more variable than depending on T. suecica. In community, proportions Marinobacter Flavobacteriaceae considerably varied accordance cell number suecica, there no clear variation composition. This suggests that may have stronger association algal community. Interestingly, irrespective phase, Roseobacter clade genus Muricauda predominant both communities, indicating positively affect they potentially capable enhancing growth.