Impact of Zn and Cu on the development of phenanthrene catabolism in soil

Obuekwe, Ifeyinwa S.; Semple, Kirk T.

doi:10.1007/s10661-013-3311-3

Cited by 9 publications

(5 citation statements)

References 41 publications

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“…Copper addition increases the copper concentration in animal waste and manure [17,18]. Copper and other heavy metals show antimicrobial activity and are toxic toward embryos of Gobiocypris rarus and zebrafish [19,20,21]. Excessive Cu can also harm livestock and humans [22].…”

Section: Introductionmentioning

confidence: 99%

Changes in Arsenic and Copper Bioavailability and Oxytetracycline Degradation during the Composting Process

et al. 2019

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This research focuses on the effects of the composting process on oxytetracycline antibiotic degradation and the bioavailability of arsenic and copper. A compost experiment was conducted using cow and pig manure contaminated with oxytetracycline, and copper and arsenic salts. The changes in physicochemical properties, oxytetracycline concentration, and the germination index were measured. Copper and arsenic were estimated by sequential chemical extraction. We also detected the effects of compost properties, oxytetracycline concentration, and heavy metal (loid)s on the germination index through simple regression analysis. The results showed that the composting process positively and significantly affected heavy metal(loid)s bioavailability, oxytetracycline degradation, and the germination index. Oxytetracycline concentration declined in all treatments, and the decline was more evident in cows’ manure. The copper and arsenic bioavailable fraction decreased significantly, while the low bioavailability fraction increased. The germination index increased above 50%, which showed that the compost was free of toxic substances. This result also showed that the compost properties had the most significant impact on the germination index, and their regression had the highest R2 values (0.84 and 0.99) in the cow and pig manure treatments, respectively. In conclusion, the composting process provides an economical method for oxytetracycline degradation and heavy metal(loid)s bioavailability reduction.

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Section: Introductionmentioning

confidence: 99%

Changes in Arsenic and Copper Bioavailability and Oxytetracycline Degradation during the Composting Process

et al. 2019

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“…Thus, strain SJTF8 showed great adaptability in liquid medium and high PAH-degrading efficiency, implying its appliance potential in real environments. Meanwhile, metal inhibition of biodegradation could be reduced by introducing metal-tolerant genes in the organic-degrading microorganisms [ 29 , 58 ]. In the genome of strain SJTF8, 36 metal-tolerance related genes have been found, which may be the genetic basis of the great resistance to heavy metals of this strain.…”

Section: Discussionmentioning

confidence: 99%

Characterization of the Phenanthrene-Degrading Sphingobium yanoikuyae SJTF8 in Heavy Metal Co-Existing Liquid Medium and Analysis of Its Metabolic Pathway

et al. 2020

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Polycyclic aromatic hydrocarbons (PAHs) are common organic pollutants with great carcinogenic threaten, and metal/PAH-contaminated environments represent one of the most difficult remedial challenges. In this work, Sphingobium yanoikuyae SJTF8 was isolated and identified with great and stable PAH-degrading efficiency even under stress conditions. It could utilize typical PAHs (naphthalene, phenanthrene, and anthracene) and heterocyclic and halogenated aromatic compounds (dibenzothiophene and 9-bromophenanthrene) as the sole carbon source. It could degrade over 98% of 500 mg/L phenanthrene in 4 days, and the cis-3,4-dihydrophenanthrene-3,4-diol was the first-step intermediate. Notably, strain SJTF8 showed great tolerance to heavy metals and acidic pH. Supplements of 0.30 mM of Cu2+, 1.15 mM of Zn2+, and 0.01 mM of Cd2+ had little effect on its cell growth and phenanthrene degradation; phenanthrene of 250 mg/L could still be degraded completely in 48 h. Further, the whole genome sequence of S. yanoikuyae SJTF8 was obtained, and three plasmids were found. The potential genes participating in stress-tolerance and PAH-degradation were annotated and were found mostly distributed in plasmids 1 and 2. Elimination of plasmid 2 resulted in the loss of the PAH-degradation ability. On the basis of genome mining results, the possible degrading pathway and the metabolites of S. yanoikuyae SJTF8 to phenanthrene were predicted.

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“…The reduction phenanthrene degradation may be associated with the toxic effect of nickel on enzymes involved both in the growth of the microorganism and directly in PAH degradation [31,32].…”

Section: Fig 4 Growth (A) and Degradation Of Phenanthrene (B) By E Me...mentioning

confidence: 99%

Potential of the rhizobacterium Ensifer meliloti for the phytoremediation of mixed PAH–heavy metal contamination

Sungurtseva,

Zryacheva,

Pozdnyakova

et al. 2023

BIO Web Conf.

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The potential of the rhizobial strain Ensifer meliloti P221 as a bacterium capable of degrading phenanthrene in the presence of a heavy metal (nickel) and exhibiting plant-growth promoting activity toward Sorghum bicolor under mixed contamination condition was studied. It was shown that nickel at a concentration of 0.1 mM inhibited the microbial growth and phenanthrene degradation by 43 and 34%, respectively. Analysis of the enzymes involved in the phenanthrene degradation by the rhizobium revealed the activity of the phenanthrenequinone reductase (PQR) and protocatechuate 2,3-dioxigenase (2,3-PCD). It was found that nickel at concentrations up to 0.2 mM did not affect significantly the PQR activity, but inhibited it by 30% when the metal concentration increased to 5 mM. Nickel at concentrations up to 5.0 mM did not affect significantly on the activity of 2,3-PCD. E. meliloti promoted elongation of sorghum seedling roots by 69% in medium co-contaminated with phenanthrene and nickel. The results obtained assume that the rhizobial strain studied can exhibit its PAH-degrading and plant-growth promoting activities in the environment co-contaminated with nickel and phenanthrene. This microorganism may be promising for bioremediation and phytoremediation of mixed PAH–heavy metal contamination.

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Impact of Zn and Cu on the development of phenanthrene catabolism in soil

Cited by 9 publications

References 41 publications

Changes in Arsenic and Copper Bioavailability and Oxytetracycline Degradation during the Composting Process

Changes in Arsenic and Copper Bioavailability and Oxytetracycline Degradation during the Composting Process

Characterization of the Phenanthrene-Degrading Sphingobium yanoikuyae SJTF8 in Heavy Metal Co-Existing Liquid Medium and Analysis of Its Metabolic Pathway

Potential of the rhizobacterium Ensifer meliloti for the phytoremediation of mixed PAH–heavy metal contamination

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