Tolerance of Chemoorganotrophic Bioleaching Microorganisms to Heavy Metal and Alkaline Stresses

Figure 4

Growth of Bacillus mucilaginosus on nutrient agar plates. (a) Blank reference strain (after 72 hours of growth in batch culture, resulting in typical colony morphology on agar plate). (b) Strain that had previous contact with Cd(II) in a batch culture for 72 hours (note smaller colonies and the absence of mucous generation).

(a)

(b)