Author:
Flashinski S. J.,Lichtenstein E. P.
Abstract
The fungus Rhizopus arrhizus, capable of degrading the soil insecticide Dyfonate in shake cultures, was added to a 14C-Dyfonate-treated soil (Piano silt loam) to test its capability to degrade the insecticide in a soil environment. Scanning electron microscopy showed that this soil was a poor substrate for the growth of microorganisms and that the fungus grew well only when a glucose-containing nutrient medium was added to the soil. It was under these conditions that 14C-Dyfonate was degraded during a 21-day incubation period as indicated by a recovery of only 12% of the applied insecticide, by the production of its oxygen analog, dyfoxon, and by the appearance of significant amounts of water-soluble metabolites (11% of the applied 14C). Inoculation of soils with fungal spores in water also resulted in a metabolism of the insecticide, but at a slower rate. The addition of nutrient media, but no fungal spores, to Dyfonate-treated soil, enhanced the growth of naturally occurring microorganisms and resulted in some degradation of the insecticide.
Publisher
Canadian Science Publishing
Subject
Genetics,Molecular Biology,Applied Microbiology and Biotechnology,General Medicine,Immunology,Microbiology
Cited by
11 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献