Title

Heavy metal resistance patterns of Frankia strains

Abstract

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.

Publication Date

2-1-2002

Journal Title

Applied and Environmental Microbiology

Publisher

American Society for Microbiology

Digital Object Identifier (DOI)

10.1128/AEM.68.2.923-927.2002

Scientific Contribution Number

2076

Document Type

Article

Rights

Copyright © 2002, American Society for Microbiology. All Rights Reserved.