3.2. Heavy metal tolerance study
The bacterial mixtures containing all strains tolerated the highest
minimum inhibitory concentration (MIC) of heavy metals, 9 mM
(Fig. 2). Among the bacterial strains and mixtures tested, three of
them (A3, KJ-46, and KJ-47) tolerated a heavy metal MIC of 6 mM.
Previous research implied that because the members of bacterial
mixtures communicate and differentiate, the bacterial mixtures
can perform more complex tasks and survive in more changeable