Identification of soil bacteria susceptible to TiO2 and ZnO nanoparticles.

ABSTRACT: Because soil is expected to be a major sink for engineered nanoparticles (ENPs) released to the environment, the effects of ENPs on soil processes and the organisms that carry them out should be understood. DNA-based fingerprinting analyses have shown that ENPs alter soil bacterial communities, but specific taxon changes remain unknown. We used bar-coded pyrosequencing to explore the responses of diverse bacterial taxa to two widely used ENPs, nano-TiO(2) and nano-ZnO, at various doses (0, 0.5, 1.0, and 2.0 mg g(-1) soil for TiO(2); 0.05, 0.1, and 0.5 mg g(-1) soil for ZnO) in incubated soil microcosms. These ENPs significantly altered the bacterial communities in a dose-dependent manner, with some taxa increasing as a proportion of the community, but more taxa decreasing, indicating that

SUBMITTER: Ge Y 

PROVIDER: S-EPMC3426698 | biostudies-literature | 2012 Sep

REPOSITORIES: biostudies-literature