Growth of Dietzia sp. DQ12-45-1b and P. stutzeri SLG510A3-8 on hexadecane (C16) individually (pure-Dietzia sp. and pure-P. stutzeri) or together (co-Dietzia sp. and co-P. stutzeri). (a) C16 degradation efficiencies, a 12-day growth period, of the microbial community (coculture), and Dietzia sp. DQ12-45-1b (pure-Dietzia sp.), and P. stutzeri SLG510A3-8 (pure-P. stutzeri). (b) Time courses of P. stutzeri SLG510A3-8 cell densities (CFU ml−1) in its monoculture (pure-P. stutzeri) or the coculture system with Dietzia sp. DQ12-45-1b (co-P. stutzeri). (c) Time courses of Dietzia sp. DQ12-45-1b cell density (CFU ml−1) and the residual C16 content (g liter−1) in its monoculture (pure-Dietzia) or the coculture system (co-Dietzia). *, P < 0.05; **, P < 0.01.