Bacterial communities help survivals of diatom populations from viral attacks

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In axenic conditions, marine diatom Chaetoceros tenuissimus cells were completely crashed due to viral inoculations and a regrowth of the population was not observed. The host populations inoculated with marine bacterial community also showed the rapid decreases of the cell concentration. After 7 days of post viral infection, however, a few cells survived and the population showed regrowth under a high viral concentration environment. In nature, many environmental factors and host strategies may affect the survival of the diatom populations from viral attacks. The host cell associated bacteria might be one of these factors, but the mechanisms are still unknown.