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Title: Rapid Degradation of the Organophosphate Pesticide – Chlorpyrifos by a Novel Strain of Pseudomonas Nitroreducens Ar-3
Authors: Aswathi, A
Pandey, A
Sukumaran, R K
Keywords: chlorpyrifos
biodegradation
pseudomonas
organophosphate hydrolase
pesticide degradation
Issue Date: 15-Aug-2019
Publisher: Elsevier
Citation: Bioresource Technology; 292:122025
Abstract: The indiscriminate use of pesticides leads to serious food safety and toxicity issues and threatens the environment and biodiversity. Pseudomonas nitroreducens AR-3 isolated from pesticide contaminated agricultural soil removed 97% of chlorpyrifos (CP) in just 8 h, in a mineral salt medium (MSM) containing glucose (1.0 g/L) and yeast extract (0.5 g/L) at 30 °C and 2% (v/v) inoculum when challenged with 100 mg/L CP. 3, 5, 6-trichloro 2-pyridinol (TCP), the degradation product of CP was detected only in low levels, indicating its further degradation. Organophosphate hydrolase (OPH), the enzyme considered responsible for CP degradation, had an intracellular localization. Crude OPH (1 mg/ml) removed 42% of 100 mg/L chlorpyrifos in just 2 h, indicating a rapid rate of degradation. Ultra-fast degradation of chlorpyrifos with an inducible OPH marks the potential of P. nitroreducens AR-3 for bioremediation of organophosphates. The strain AR-3 has the fastest rate of organophosphate degradation reported till date among Pseudomonads
URI: https://www.sciencedirect.com/science/article/pii/S0960852419312556
http://10.10.100.66:8080/xmlui/handle/123456789/3482
Appears in Collections:2019

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