Heavy metal resistance patterns of Frankia strains
The sensitivity of 12 Frankia strains to heavy metals was determined by a growth inhibition assay. In general, all of the strains were sensitive to low concentrations (50 mM), and SeO22- (1.5 to 3.5 mM). While most strains were sensitive to 0.1 MM CU2+, four strains were resistant to elevated levels of Cu2+ (2 to 5 mM and concentrations as high as 20 mM). The mechanism of SeO22- resistance seems to involve reduction of the selenite oxyanion to insoluble elemental selenium, whereas Pb2+ resistance and Cu2+ resistance may involve sequestration or binding mechanisms. Indications of the resistance mechanisms for the other heavy metals were not as clear.
Applied and Environmental Microbiology
American Society for Microbiology
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Richards, Joel W.; Krumholz, Glenn D.; Chval, Matthew S.; and Tisa, Louis S., "Heavy metal resistance patterns of Frankia strains" (2002). Applied and Environmental Microbiology. 7.
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