Figure 3: Effects of heat on the stability of the emulsification capacity of bacterial cell-free culture from wild-type and mutant (587::TnphoA24, 587::TnphoA31, 587::TnphoA33 and 587::TnphoA50) strains of Bradyrhizobium elkanii. Emulsifying activity at 30°C, non-treated sample, compared with autoclaving sample. All data points are the means ± SD of three different experiments performed on different days (each experiment was conducted in triplicate).