Ecotoxicological Impact of the Bioherbicide Leptospermone on the Microbial Community of Two Arable Soils.

ABSTRACT: The ecotoxicological impact of leptospermone, a β-triketone bioherbicide, on the bacterial community of two arable soils was investigated. Soil microcosms were exposed to 0 × (control), 1 × or 10 × recommended dose of leptospermone. The β-triketone was moderately adsorbed to both soils (i.e.,: K fa ~ 1.2 and K oc ~ 140 mL g(-1)). Its dissipation was lower in sterilized than in unsterilized soils suggesting that it was mainly influenced by biotic factors. Within 45 days, leptospermone disappeared almost entirely from one of the two soils (i.e., DT50 < 10 days), while 25% remained in the other. The composition of the microbial community assessed by qPCR targeting 11 microbial groups was found to be significantly modified in soil microcosms exposed to leptospermone. Pyrosequencing of 16S rRNA

SUBMITTER: Romdhane S 

PROVIDER: S-EPMC4877392 | biostudies-literature | 2016

REPOSITORIES: biostudies-literature