Figure 5

Effects of the initial concentration of nitrogen on the uptake rate of (A) ammonium r _NH4+ (mg N.L ⁻¹ .h ⁻¹ ); (B) arginine r _Arg (mg N.L ⁻¹ .h ⁻¹ ); and (C) glutamine r _Gln (mg N.L ⁻¹ .h ⁻¹ ). Low biomass-producing strains are shown by white bares and high biomass-producing strains are shown by black bars. Mean values and standard error of the mean (SEM) were calculated from two replicates. The SEM is indicated by vertical error bars.