Factors affecting antagonism of the growth of Phanerochaete chrysosporium by bacteria isolated from soils

Radtke, Corey W.; Cook, W. S.; (?), A. Anderson

doi:10.1007/s002530050143

Cited by 15 publications

(29 citation statements)

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“…Transformation can lead to complete detoxification, breakdown of products, which may be further attacked by other microbial groups, or in some cases, to more toxic metabolites [3]. Triazines, among other halogenated aromatic compounds, are often co-metabolized into more toxic metabolites [9, 10]. For example, microbial enzyme-mediated methylation reactions usually increase herbicide lipophilicity and thus the potential for bioaccumulation in the food chain [2].…”

Section: Bioremediation Approachesmentioning

confidence: 99%

“…There is also a need to establish a target concentration once remediation is achieved. Generally, the target concentration is assumed to be in the 1 ppm (mg/L) range, but in practice it can vary from site to site and region to region [3, 10]. …”

Section: Bioremediation Approachesmentioning

confidence: 99%

“…Bacteria are very sensitive to fluctuating environmental conditions in soil since their growth requires films of water to form in soil pores. However, filamentous fungi offer major advantages over bacteria regarding the diversity of compounds they are able to oxidize [10]. In addition, they are robust organisms that are generally more tolerant to high concentrations of polluting chemicals than bacteria [22].…”

Section: Bioremediation Approachesmentioning

confidence: 99%

“…It is accepted that both of these peroxidases catalyze the oxidation of (endogenously-produced) low-molecular weight mediators using H 2 O 2 as an oxidant. These powerful mediators then oxidize lignin, leaving it partially modified and open to further attack by other enzymes such as LAC [9, 10]. …”

Section: White Rot Fungi: Evidence Of Enzyme-mediated Degradation Of mentioning

confidence: 99%

“…1 compares the persistence of several xenobiotic compounds in soil, including those that receive attention later in this review. Some groups, such as triazines, are moderately persistent in soil [10] with reported half-life values of up to 50~100 days, depending largely on soil environmental conditions [11]. Microbial metabolism has long been regarded as the most important mechanism of degradation of such compounds in soil [12, 13].…”

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confidence: 99%

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Environmental Factors and Bioremediation of Xenobiotics Using White Rot Fungi

2010

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This review provides background information on the importance of bioremediation approaches. It describes the roles of fungi, specifically white rot fungi, and their extracellular enzymes, laccases, ligninases, and peroxidises, in the degradation of xenobiotic compounds such as single and mixtures of pesticides. We discuss the importance of abiotic factors such as water potential, temperature, and pH stress when considering an environmental screening approach, and examples are provided of the differential effect of white rot fungi on the degradation of single and mixtures of pesticides using fungi such as Trametes versicolor and Phanerochaete chrysosporium. We also explore the formulation and delivery of fungal bioremedial inoculants to terrestrial ecosystems as well as the use of spent mushroom compost as an approach. Future areas for research and potential exploitation of new techniques are also considered.

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Section: Bioremediation Approachesmentioning

confidence: 99%

Section: Bioremediation Approachesmentioning

confidence: 99%

Section: Bioremediation Approachesmentioning

confidence: 99%

Section: White Rot Fungi: Evidence Of Enzyme-mediated Degradation Of mentioning

confidence: 99%

mentioning

confidence: 99%

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Environmental Factors and Bioremediation of Xenobiotics Using White Rot Fungi

2010

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Degradation of aromatic hydrocarbons by white‐rot fungi in a historically contaminated soil

D’Annibale

Ricci²,

Leonardi

et al. 2005

Biotech & Bioengineering

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Phanerochaete chrysosporium NRRL 6361 and Pleurotus pulmonarius CBS 664.97 were tested for their ability to grow under nonsterile conditions and to degrade various aromatic hydrocarbons in an aged contaminated soil that also contained high concentrations of heavy metals. After 24 days fungal incubation, carbon-CO2 liberated, an indicator of microbial activity, reached a plateau. At the end of the incubation time (30 days), fungal colonization was clearly visible and was confirmed by ergosterol and cell organic carbon determinations. In spite of unfavorable pH (around 7.4) and the presence of heavy metals, both fungi produced Mn-peroxidase activity. In contrast, laccase and aryl-alcohol oxidase were detected only in the soil treated with P. pulmonarius CBS 664.97 and lignin-peroxidase in that with P. chrysosporium NRRL 6361. No lignin-modifying enzyme activities were present in non-inoculated soil incubated for 30 days (control microcosm). Regardless of the fungus employed, a total removal of naphtalene, tetrachlorobenzene, and dichloroaniline isomers, diphenylether and N-phenyl-1-naphtalenamine, was observed. Significant release of chloride ions was also observed in fungal-treated soil, in comparison with that recorded in the control microcosm. Both fungi led to a significant decrease in soil toxicity, as assessed using two different soil contact assays, including the Lepidium sativum L. germination test and the Collembola mortality test.

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