Skip to main content
ARS Home » Research » Publications at this Location » Publication #151782
Title: UPTAKE OF HERBICIDES BY SOIL BACTERIA

Author
item SIMS, GERALD
item POTERA, RENEE - UNIV OF ILLINOIS
item TRANEL, PATRICK - UNIV OF ILLINOIS
item RIECHERS, DEAN - UNIV OF ILLINOIS

Submitted to: Society of Environmental Toxicology and Chemistry (SETAC)
Publication Type: Abstract Only
Publication Acceptance Date: 2/27/2004
Publication Date: 5/23/2004
Citation: Sims, G.K., Potera, R., Tranel, P., Riechers, D. 2003. Uptake of herbicides by soil bacteria. [abstract]. Society for Environmental Toxicology and Chemistry. 24th Annual Meeting in North America. Austin, TX. No. PT-026. Annual Meeting Abstract Book. No. p. 194.

Interpretive Summary:

Technical Abstract: Experiments were performed to evaluate the effect of solution pH on bacterial uptake of ionizable herbicides. Uptake was measured using a thick cell suspension method in buffers ranging in pH from 3-9. Neutral species were preferentially taken up for both acidic and basic compounds, though the effects of pH were less dramatic for organisms capable of rapid degradation of the substrate. The results suggested a passive uptake mechanism. In the case of compounds with potential toxicity to soil bacteria (inhibitors of acetolactate synthase), whole cells appeared insensitive to herbicides that were potent inhibitors of ALS enzyme isolated from the organisms. These findings suggest permeability barriers may provide protection from toxicity of these herbicides to soil bacteria.