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Morphology of L. aggregata LZB033 (A) and ΔrpoN mutant (B) strains and the cell counts of these strains (C) after culturing in seawater at 4°C for 13 weeks. Bacteria were cultured in artificial seawater and maintained at 4°C without shaking. Culturability was determined by spread plate count on LBSS plates at 0, 1, 3, 5, 7, 9, 11, and 13 weeks.
