Influence of Xenobiotic Substances on Actinomycete Comunities in Soil

Abstract

Sulfonylurea herbicides are frequently used in agricultural crops even if they determine quantitative and qualitative changes in soil microbial communities. In this study it was used increasing doses of two sulfonylurea herbicides, tribenuron-methyl and nicosulfuron, in order to establish their effect on actinomyces communities from soil under laboratory conditions. Using nutritive gelose with soil extract and Gause medium the main species of actinomyces were identified: Streptomyces albus, Streptomyces aureus and Streptomyces chrysomallus. Streptomyces albus is the most abundant species, which could indicate a resistance to used herbicides. Sulfonylurea herbicides, tribenuron-methyl and nicosulfuron, point out a lower value, inhibiting the actinomycete communities from soil.

Keywords

• actinomycetes
• sulfonylureic herbicid
• xenobiotic