Biodegradation of chlorpyrifos and 3, 5, 6‐trichloro‐2‐pyridinol by a novel rhizobial strain <scp><i>M</i></scp><i>esorhizobium</i> sp. <scp>HN3</scp>

Jabeen, Hina; Iqbal, Samina; Anwar, Samina

doi:10.1111/wej.12081

Cited by 74 publications

(31 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The significance of biotic degradation of soil-incorporated chlorpyrifos was indicated by a large difference in degradation rates of pesticide in unsterilized and sterilized soils, i.e., 6 × 10 −2 day −1 and t 0.5 of 25 days ( Fig. 1 and Table 2), thus evidencing the significant role of microbes in dissipating and detoxifying the residues of chlorpyrifos in the soil (Jabeen et al 2014;Rokade and Mali 2013). Chlorpyrifos also inhibits the growth of bacterial populations present in the soil and interrupts the degradation of soil organic matter.…”

Section: Photodegradation Studies Of Soil-incorporated Chlorpyrifosmentioning

confidence: 97%

See 1 more Smart Citation

Cu2+ and Fe2+ mediated photodegradation studies of soil-incorporated chlorpyrifos

Rafique

Tariq

Ahad

et al. 2015

Environ Sci Pollut Res

View full text Add to dashboard Cite

The influences of Cu(2+) and Fe(2+) on the photodegradation of soil-incorporated chlorpyrifos were investigated in the present study. The soil samples spiked with chlorpyrifos and selected metal ions were irradiated with UV light for different intervals of time and analyzed by HPLC. The unsterile and sterile control soil samples amended with pesticides and selected metals were incubated in the dark at 25 °C for the same time intervals. The results of the study evidenced that photodegradation of chlorpyrifos followed the first-order kinetics. The dissipation t0.5 of chlorpyrifos was found to decrease from 41 to 20 days under UV irradiation. The rate of chlorpyrifos photodegradation was increased in the presence of both metals, i.e., Cu(2+) and Fe(2+). Thus, initially observed t0.5 of 19.8 days was decreased to 4.39 days in the case of Cu(+2) and 19.25 days for Fe(+2). Copper was found to increase the rate of photodegradation by 4.5 orders of magnitude while the microbial degradation of chlorpyrifos was increased only twofold. The microbial degradation of chlorpyrifos was only negligibly affected by Fe(2+) amendment. The studied trace metals also affected the abiotic degradation of the pesticide in the order Cu(2+) > Fe(2+).

show abstract

Section: Photodegradation Studies Of Soil-incorporated Chlorpyrifosmentioning

confidence: 97%

“…The rate of hydrolysis of oxon is greater than that of chlorpyrifos so it does not accumulate in the soil. UV irradiation is also known to cause a decrease in the levels of chlorinated pyridinols thereby confirming their mineralization [Jabeen et al 2014].…”

Section: Introductionmentioning

confidence: 99%

Cu2+ and Fe2+ mediated photodegradation studies of soil-incorporated chlorpyrifos

Rafique

Tariq

Ahad

et al. 2015

Environ Sci Pollut Res

View full text Add to dashboard Cite

show abstract

“…resinovorans (12), Ps. fluorescens (13), Bacillus subtilis (13,14,15,16), Bacillus sp and Micrococcus sp (17,18), B. firmis (19), B. cereus (20), Stenotrophomonas (21), Serratia marcescens, Klebsiella oxytoca (22), Achromobacter sp, Ochrobactrum sp (23), Alcaligenes faecalis (24), Mesorhizobium (25), cellulomonas fimi (26), Gordonia (27), B. polymyxa (28), Kocuria sp (29), Staphylococcus sp, Streptococcus sp, azomonas sp, Flavobacterium sp (30) were extensively studied in degradation of chlorpyrifos.…”

Section: Issn: 2320-5407mentioning

confidence: 99%

Isolation and Identification of Chlorpyrifos Degrading Bacteria From Agricultural Soil.

Hamsavathani¹,

Aysha²,

Ajith³

2017

IJAR

View full text Add to dashboard Cite

The extensive use of pesticides in agricultural fields for pest control pose a serious problem in contaminating soil and water ecosystems. Chlorpyrifos is the major broad spectrum organophosphorus insecticide used in paddy fields against sucking, chewing, boring insects. Due to its toxicity and persistence in the environment, there is an immediate need to eliminate them from contaminated sites by biodegradation. Two pesticide degrading bacteria were screened and isolated from chlorpyrifos contaminated soil by enrichment culture technique and were identified as Kocuria kristinae and Staphylococcus aureus. The growth response and degradation of chlorpyrifos by the isolates in MSM broth supplemented with 0.5% chlorpyrifos was monitored every 48-72 hrs in spectrophotometer at 600nm. Kocuria sp showed maximum growth in 7 days than Staphylococcus aureus. The degradation efficiency of the strains were determined and estimated by the removal percentage of chlorpyrifos from the liquid culture. Both the isolate showed the degrading capability of chlorpyrifos in MSM. The isolate, S. aureus was more potent in degrading the 80% of the total compound from the media in 2 weeks of incubation than K. kristinae which shows 35 % of degradation. These results were further confirmed by GCMS, in which S. aureus has degraded 82.06% and K. kristinae has degraded 30.78% of chlorpyrifos in the medium. This study indicates that the isolate, Staphylococcus aureus is more potent in degrading chlorpyrifos in liquid culture and can also be used in bioremediation of chlorpyrifos contaminated soils.

show abstract

“…During its growth on MM-chlorpyrifos broth, the strain MemCl4 generated a faint greenish color. This green coloration might be due to production of 3,6-dihydroxypyridine-2,5-dione (DHPD) and 3,5,6-trichloro-2-methoxypyridine (TMP) following degradation of TCP, as has been reported previously by Li et al (2013) and Jabeen et al (2015). However, during GC-MS library search we could not detect this intermediate.…”

Section: Gelatin Hydrolysis -mentioning

confidence: 53%

Evidence of biodegradation of chlorpyrifos by a newly isolated heavy metal-tolerant bacterium Acinetobacter sp. strain MemCl4

et al. 2016

View full text Add to dashboard Cite

A bacterial strain, designated as MemCl4, capable of utilizing chlorpyrifos as sole source of carbon was isolated by enrichment culture from an agricultural soil sample of Burdwan District, West Bengal, India. It was identified as Acinetobacter sp. by using phenotypic and 16S rRNA gene-based molecular phylogenetic approach. The strain could degrade 98 % of chlorpyrifos within 144 h. Through thin layer chromatography, high-performance liquid chromatography and gas chromatographymass spectrometry analyses, 3,5,6 trichloro-2-pyridinol (TCP) was identified as the only major intermediate during such degradation. The strain could also utilize TCP as sole source of carbon for growth. Degradation studies indicated utilization of chlorpyrifos with formation TCP, followed by decrease in amount of TCP with gradual passage of time. This indicated evidence of mineralization of both chlorpyrifos and TCP by the strain. The Gram-negative and esterase-positive strain was capable of tolerating various heavy metal salts such as arsenite, arsenate, cadmium, chromium, copper, iron, lead, nickel and zinc on sucrose low-phosphate medium. The strain MemCl4 might be considered biotechnologically potential for bioremediation and or restoration of chlorpyrifos-contaminated agricultural fields. This is the first report of a chlorpyrifos-degrading, heavy metal-tolerant bacterium belonging to the genus Acinetobacter, to the best of our knowledge. The strain, however, could not degrade chlorpyrifos in the presence of two heavy metal salts tested (viz. arsenate and zinc sulfate).

show abstract

Biodegradation of chlorpyrifos and 3, 5, 6‐trichloro‐2‐pyridinol by a novel rhizobial strain Mesorhizobium sp. HN3

Cited by 74 publications

References 37 publications

Cu2+ and Fe2+ mediated photodegradation studies of soil-incorporated chlorpyrifos

Cu2+ and Fe2+ mediated photodegradation studies of soil-incorporated chlorpyrifos

Isolation and Identification of Chlorpyrifos Degrading Bacteria From Agricultural Soil.

Evidence of biodegradation of chlorpyrifos by a newly isolated heavy metal-tolerant bacterium Acinetobacter sp. strain MemCl4

Contact Info

Product

Resources

About