Extensive degradation of silvex by synergistic action of aquatic microorganisms

2,4,5-Trichlorophenoxyacetic acid (2,4,5-T) decomposition in tropical soil and its cometabolism by bacteria in vitro

“…The fact that some bacteria brought about loss of UV absorbancy indicates they are capable of cleaving the ring. These results are in agreement with the findings of Ou and Sikka (1977), who found extensive degradation of the aromatic ring of a structurally similar molecule, 2-(2,4,5-trichlorophenoxy)propionate, by aquatic bacteria. Phenoxy herbicides with a chlorine in the meta position are generally resistant to microbial degradation (Burger et al, 1962), but it is clear from the data presented herein that high cell densities can bring about significant metabolism in short periods and that microorganisms transform, albeit slowly, the chemical in soil too.…”

Degradation of methyl parathion by a mixed bacterial culture and a Bacillus sp. isolated from different soils

“…This is not the first time that individual isolates from a mixed culture have failed to degrade a target chemical, despite the fact that a parent mixed culture did. A bacterial mixed culture consisting of two bacteria cometabolically degraded the herbicide silvex to C02 and H20 (Ou and Sikka, 1977). However, individual isolates as well as a mixture of the two isolates transferred to the same medium failed to degrade the herbicide.…”

Microbial breakdown of halogenated aromatic pesticides and related compounds

“…and an Achromobacter sp. degraded 2-(2,4,5-trichlorophenoxy)propionic acid (silvex) with release of chlorine and cleavage of the aromatic ring [176]. Trace amounts of 2,4,5-trichlorophenoi were found in the culture media.…”