Efficient alachlor degradation by the filamentous fungus Paecilomyces marquandii with simultaneous oxidative stress reduction

•The acceleration of alachlor degradation by Paecilomyces marquandii in bioreactor.•Induction of oxidative stress during biodegradation.•Active response of the tested fungus against alachlor induced oxidative stress.•ROS alleviation at neutral pH. The acceleration of alachlor degradation by Paecilom...

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Bibliographic Details
Published in:Bioresource technology 2015-12, Vol.197, p.404-409
Main Authors: Słaba, Mirosława, Różalska, Sylwia, Bernat, Przemysław, Szewczyk, Rafał, Piątek, Milena A., Długoński, Jerzy
Format: Article
Language:English
Subjects:
Acetamides - metabolism
Acetamides - toxicity
Alachlor
Ascorbic Acid - metabolism
Biodegradation
Biodegradation, Environmental
Bioreactors
Biotechnology - instrumentation
Biotechnology - methods
Catalase - metabolism
Chloroacetanilides
Glutathione - metabolism
Herbicides - metabolism
Hydrogen-Ion Concentration
Oxidative Stress - drug effects
Paecilomyces - drug effects
Paecilomyces - metabolism
Paecilomyces marquandii
Reactive Oxygen Species - metabolism
ROS
Superoxide Dismutase - metabolism
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Summary:•The acceleration of alachlor degradation by Paecilomyces marquandii in bioreactor.•Induction of oxidative stress during biodegradation.•Active response of the tested fungus against alachlor induced oxidative stress.•ROS alleviation at neutral pH. The acceleration of alachlor degradation by Paecilomyces marquandii under controlled and optimized conditions of fungal cultivation in liquid batches was observed (by ca. 20% in comparison to the flask cultures). Acidic environment and oxygen limitation resulted in deterioration of herbicide elimination. Efficient xenobiotic degradation did not correlate with free radicals formation, but some conditions of bioreactor cultivation such as neutral pH and oxygen enriched atmosphere (pO2⩾30%) caused a decrease in the reactive oxygen species (ROS) accumulation in mycelia. The changes in the glutathione (GSH) and ascorbic acid (AA) levels, also in the dismutase (SOD) and catalase (CAT) activities showed active response of the tested fungus against alachlor induced oxidative stress. These results will contribute to the improvement of chloroacetanilides elimination by fungi and extend the knowledge concerning oxidative stress induction and fungal cellular defense.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2015.08.045