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Microbial conversion of fungicide vinclozolin
L A Golovleva1, Z I Finkelstein, A V Polyakova
1Institute of Biochemistry and Physiology of Microorganisms, USSR Academy of Sciences, Pushchino, Moscow Region.
Summary
Vinclozolin fungicide impacts soil microbes, decreasing fungi and actinomycetes while boosting nitrification. Persistent residues and novel microbial degradation pathways were observed in this ecological safety study.
Area of Science:
- Environmental Science
- Microbiology
- Soil Science
Background:
- Vinclozolin is a fungicide used in agriculture.
- Understanding its ecological impact on soil microbial communities is crucial for environmental safety assessments.
Purpose of the Study:
- To evaluate the ecological safety of vinclozolin.
- To assess the impact of vinclozolin on soil microbial abundance and function.
- To investigate the persistence and degradation of vinclozolin in soil.
Main Methods:
- Field and laboratory experiments were conducted.
- Soil microbial abundance (actinomycetes, mycelial fungi) and nitrification rates were measured.
- Residual vinclozolin and its derivatives in soil were analyzed over 12 months.
- Microbial strains capable of degrading vinclozolin were isolated.
Main Results:
- Vinclozolin application decreased actinomycetes and mycelial fungi abundance.
- Nitrification rates were enhanced following vinclozolin treatment.
- Soil residual amounts of vinclozolin ranged from 6-12% after 12 months.
- Persistent chlorinated derivatives of vinclozolin were detected in the soil.
- Microbial strains from genera Pseudomonas and Bacillus were identified as vinclozolin degraders.
Conclusions:
- Vinclozolin significantly alters soil microbial community structure and function.
- The fungicide exhibits persistence in soil, with detectable residues after a year.
- The identification of specific microbial strains capable of utilizing vinclozolin offers potential for bioremediation strategies.