Biodegradation of polycyclic aromatic hydrocarbons by new isolates of white rot fungi

Abstract

Eight rapid Poly R-478 dye-decolorizing isolates from The Netherlands were screened in this study for the biodegradation of polycyclic aromatic hydrocarbons (PAH) supplied at 10 mg liter-'. Several well-known ligninolytic culture collection strains, Phanerochaete chrysosporium BKM-F-1767, Trametes versicolor Paprican 52, and Bjerkandera adusta CBS 595.78 were tested in parallel. All of the strains significantly removed anthracene, and nine of the strains significantly removed benzo[a]pyrene beyond the limited losses observed in sterile liquid and HgCl2-poisoned fungus controls. One of the new isolates, Bjerkandera sp. strain Bos 55, was the best degrader of both anthracene and benzo[ajpyrene, removing 99.2 and 83.1% of these compounds after 28 days, respectively. Half of the strains, exemplified by strains of the genera Bjerkandera and Phanerochaete, converted anthracene to anthraquinone, which was found to be a dead-end metabolite, in high yields. The extracellular fluids of selected strains were shown to be implicated in this conversion. In contrast, four Trametes strains removed anthracene without significant accumulation of the quinone. The ability of Trametes strains to degrade anthraquinone was confirmed in this study. None of the strains accumulated PAH quinones during

Biodegradation of asphaltene and petroleum compounds by a highly potent Daedaleopsis sp.

“…There are limited studies about biodegradation of some of heavy molecules by Daedaleopsis sp. [68]. But this is the first report that Daedaleopsis sp.…”

Degradation of contrasting pesticides by white rot fungi and its relationship with ligninolytic potential

“…Degradation of a number of polymeric dyes, including Remazol brilliant blue and Poly R-478 correlates well with ligninolytic potential [4,5], and has been used as a presumptive test to screen fungi for their potential abilities to degrade lignin and xenobiotics. Degradation of Poly R-478 has been shown to correlate well with the capacity of diverse white rot fungi to degrade 3^5-ring PAHs [6]. However, it is unclear how ligninolytic activity relates to the degradation by white rot fungi of mono-aromatic xenobiotics, including many pesticides, which do not require depolymerisation.…”

Aryl alcohols in the physiology of ligninolytic fungi

“…Lignin degradation 155 functions in a non-specific manner: consequently, other compounds that have an aromatic structure are also highly susceptible for attack by white-rot fungi and their ligninolytic enzymes. Therefore white-rot fungi can potentially be applied to clean up toxic waste sites [16][17][18].…”