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Mucor assisted degradation of sulfosulfuron in irrigation water

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Title Mucor assisted degradation of sulfosulfuron in irrigation water
 
Creator Choudhury, Partha P.
Parey, Shivani
Yadav, Urvashi
Tiwari, Suresh
 
Subject Biodegradation
Bioremediation
Herbicides
Microbial degradation
Sulfonylurea herbicide
 
Description 884-890
Sulfosulfuron is a widely used wheat herbicide, which has two major environmental issues, viz. carryover effect to
succeeding crops, and groundwater and surface water contamination. The safer aquatic environment requires the degradation
of the herbicide. In this present investigation, we have attempted to isolate an efficient fungus naturally abundant in water,
which can degrade sulfosulfuron in aqueous phase. Mucor sp., a fungus isolated from irrigation water was characterized as a
sulfosulfuron-degrading microorganism. It survived in the minimal broth having sulfosulfuron at a level of 2000 mgL-1. It
was able to degrade entire amount of sufosulfuron applied to water within 27 days. Two major routes of degradation were
established. One route involved the cleavage of sulfonylurea bridge resulting in the formation of a couple of major
metabolites, viz. 2-amino-4,6-dimethoxypyrimidine (I) and 2-ethylsulfonylimidazo{1,2-a}pyridine-3-sulfonamide (II). The
other route was the cleavage of sulfonylamide linkage, which formed the metabolite N-(4,6-dimethoxypyrimidin-2-yl)urea
(III). Three other metabolites, N-(4,6-dimethoxypyrimidin-2-yl)-N'-hydroxyurea (IV), N,N'-bis(4,6-dimethoxypyrimidin-2yl)urea
(V) and N-(4,6-dimethoxypyrimidin)-N-(4-hydroxy-6-methoxy pyrimidin-2-yl)urea (VI) were also identified. The
survival of Mucor sp. at a very high concentration of sulfosulfuron and its ability to degrade the herbicide through various
biochemical mechanisms showed its potential in the bioremediation process of sulfosulfuron contaminated water.
 
Date 2021-12-02T06:25:54Z
2021-12-02T06:25:54Z
2021-12
 
Type Article
 
Identifier 0975-1009 (Online); 0019-5189 (Print)
http://nopr.niscair.res.in/handle/123456789/58567
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJEB Vol.59(12) [December 2021]