Parathion degradation of submerged rice soils in the Philippines

Sethunathan, N.; Yoshida, Tomio

doi:10.1021/jf60187a040

Cited by 25 publications

(8 citation statements)

References 5 publications

(8 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1). The decrease in the toxicity of pesticides by reductive reactions was also reported (Sethunathan and Yoshida 1973).…”

Section: Estimation Of the Toxicities Of Transformation Productsmentioning

confidence: 67%

“…The risk of physiological damage in non-target organisms caused by these pesticides is extremely high since acetylcholinesterase is present in all vertebrates, including humans. Reductive reactions catalyzed by soil and water microflora have been of significance in diminishing toxicity of some organophosphorus pesticides, such as parathion (Sethunathan and Yoshida 1973). Reductive transformation of parathion and methyl parathion significantly decreased the toxicity of pesticides as estimated by their capacity to inhibit acetylcholinesterase activity.…”

Section: Discussionmentioning

confidence: 99%

“…At present a number of microorganisms, capable of degrading organophosphorus pesticides, have been isolated and characterized. Sethunathan and Yoshida (1973) isolated the first organophosphorusdegrading bacterium, a Flavobacterium sp., that could degrade parathion and diazinon. Both mineralization, where parathion was used as a source of carbon (Munnecke and Hsieh 1976;Rani and Lalithakumari 1994) or phosphorus (Rosenberg and Alexander 1979), and co-metabolic hydrolysis (Serdar et al 1982) have been reported.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Reductive transformation of parathion and methyl parathion by Bacillus sp.

et al. 2007

View full text Add to dashboard Cite

Based on the results of phenotypic features, phylogenetic similarity of 16S rRNA gene sequences and BIOLOG test, a soil bacterium was identified as Bacillus sp. DM-1. Using either growing cells or a cell-free extract, it transformed parathion and methyl parathion to amino derivatives by reducing the nitro group. Pesticide transformation by a cell-free extract was specifically inhibited by three nitroreductase inhibitors, indicating the presence of nitroreductase activity. The nitroreductase activity was NAD(P)H-dependent, O(2)-insensitive, and exhibited the substrate specificity for parathion and methyl parathion. Reductive transformation significantly decreased the toxicity of pesticides.

show abstract

“…1). The decrease in the toxicity of pesticides by reductive reactions was also reported (Sethunathan and Yoshida 1973).…”

Section: Estimation Of the Toxicities Of Transformation Productsmentioning

confidence: 67%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Reductive transformation of parathion and methyl parathion by Bacillus sp.

et al. 2007

View full text Add to dashboard Cite

show abstract

“…ATCC 27551 was isolated from paddy fi eld water of the Philippines as a degrader of organophosphorus pesticides such as diazinon and parathion (Sethunathan and Yoshida, 1973a). The pesticides were found to be degraded by organophosphorus hydrolase (Mulbry and Karns, 1989) which was encoded on a 43-kb plasmid (Mulbry et al, 1986).…”

mentioning

confidence: 99%

Reclassification of a parathione-degrading Flavobacterium sp. ATCC 27551 as Sphingobium fuliginis

Kawahara

Tanaka

Yoon

et al. 2010

J. Gen. Appl. Microbiol.

View full text Add to dashboard Cite

IntroductionFlavobacterium sp. ATCC 27551 was isolated from paddy fi eld water of the Philippines as a degrader of organophosphorus pesticides such as diazinon and parathion (Sethunathan and Yoshida, 1973a). The pesticides were found to be degraded by organophosphorus hydrolase (Mulbry and Karns, 1989) which was encoded on a 43-kb plasmid (Mulbry et al., 1986). The organophosphorus hydrolase has a broad range of substrates and functions at broad pH and temperature (Mulbry et al., 1986), and therefore considered to be useful for the detoxifi cation of the pesticide-polluted environment. Moreover, it has been recently applied to the degradation of nerve agents such as sarin and soman (Dumas et al., 1990) for decontamination in the case of chemical terrorism.In spite of the intensive study of the degrading enzyme, classifi cation of the producer of the enzyme has not attracted attention, and strain ATCC 27551 has been kept as Flavobacterium sp. since the early studies of this bacterium in 1970s (Sethunathan and Yoshida, 1973b). However, bacterial taxonomy has developed in these several decades and the members of the genus Flavobacterium have been reclassifi ed to other taxa.Sphingomonas was fi rst proposed by Yabuuchi et al. (1990) with fi ve species, but later developed to large group of species, and the new family Sphin- J. Gen. Appl. Microbiol., 56, 249 255 (2010) A parathione-degrading bacterium isolated from rice fi eld in the Philippines, Flavobacterium sp. ATCC 27551 (Sethunathan and Yoshida, 1973, Can. J. Microbiol., 19, 873 875), was re-examined chemotaxonomically and phylogenetically. The strain contained 2-hydroxymyristic acid (2-OH 14 0), cis-vaccenic acid (18 1 ω7c), and palmitic acid (16 0) as major cellular fatty acids, two kinds of glycosphingolipids, and ubiquinone-10 as a sole quinone component. The G+C content of genomic DNA of the strain was 65.9 mol%. The phylogenetic analyses of the 16S rRNA gene indicated that the strain was included in the family Sphingomonadaceae, and most closely related to Sphingobium fuliginis (98.0% similarity) and Sphingobium herbicidovorans (97.3%). The strain showed similar physiological characteristics and a moderate value of DNA DNA relatedness to S. fuliginis. These data suggested it reasonable to conclude that strain ATCC 27551 was identifi ed as S. fuliginis.

show abstract

“…The first report of a microorganism capable of degrading an organophosphorus compound dates from 1973, when the strain Flavobacterium sp. was isolated from a rice field in the Philippines (Sethunathan & Yoshida, 1973). This bacterium was subsequently reclassified as Sphingobium fuliginis by Kawahara, Tanaka, Yoon, and Yokota (2010).…”

mentioning

confidence: 99%

Enhancing methyl parathion degradation by the immobilization of Burkholderia sp. isolated from agricultural soils

et al. 2017

View full text Add to dashboard Cite

Organophosphate pesticides are of great interest for research because they are currently the most commonly used pesticides. In this study, a bacterial strain capable of completely degrading methyl parathion (MP) was isolated from agricultural soils in central Mexico. This strain was designated strain S5‐2 and was identified as Burkholderia cenocepacia. To increase degradation yields, cells were immobilized on three different supports: powdered zeolite and Opuntia sp. and Agave sp. fibers. The results indicated a significant increase in MP hydrolysis and p‐nitrophenol (PNP) degradation with immobilized cells compared to free cell cultures. Furthermore, immobilized cells were capable of withstanding and degrading higher concentrations of PNP compared to cell suspension cultures. The cell viability in the free cell cultures, as well as PNP degradation, was affected at concentrations greater than 25 mg/L. In contrast, cells immobilized on Opuntia sp. and Agave sp. fibers completely degraded PNP at concentrations of 100 mg/L. To verify that MP solution toxicity was decreased by B. cenocepacia strain S5‐2 via pesticide degradation, we measured the acetylcholinesterase activity, both before and after treatment with bacteria. The results demonstrate that the activity of acetylcholinesterase was unaffected after MP degradation by bacteria.

show abstract

Parathion degradation of submerged rice soils in the Philippines

Cited by 25 publications

References 5 publications

Reductive transformation of parathion and methyl parathion by Bacillus sp.

Reductive transformation of parathion and methyl parathion by Bacillus sp.

Reclassification of a parathione-degrading Flavobacterium sp. ATCC 27551 as Sphingobium fuliginis

Enhancing methyl parathion degradation by the immobilization of Burkholderia sp. isolated from agricultural soils

Contact Info

Product

Resources

About