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A Rapid and Simple Method for Screening Microorganisms with a Potential for Catechol Biodegradation

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Abstract

Catechol is a highly toxic compound that is also a key intermediate in biodegradation pathways of various aromatic compounds. In this paper, a new screening method for isolation of microorganisms with the potential for catechol biodegradation is reported. The method described is based on the ability of catechol to form a color complex with Fe3+ ions. For this purpose, basal medium that is widely used for classification of microorganisms by carbon requirements was used. Specifically, minimal Bushnell Haas medium plates supplemented with catechol at 500 mg l−1 concentration were used for both yeast and bacteria cultivation. After appearance of microorganism colonies on the growth medium, each plate was flooded with 7.0 ml of 5% (w/v) of FeCl3 and incubated for a period of 5 min at room temperature. Flooding with this solution led to the formation of a green color from Fe3+-catechol complexes in the growth medium and an appearance of clear zones around colonies of microorganisms that utilize catechol as a sole source of carbon. Based on this, the presented method could be useful as a screening step for microorganisms with a potential for catechol biodegradation.

Article Highlights

  • A new screening method for isolation of microorganisms with the potential for catechol biodegradation has been proposed.

  • The presented method is based on the ability of catechol to form a color complex of catechol and Fe3+ ions and appearance of clear zone around colonies of microorganisms which utilize catechol.

  • Described method is simple, not labor-intensive, does not require a long period of time to achieve unmistakable results.

  • This method may be also used as a starting point for screening microorganisms with the potential for other aromatic hydrocarbons degradation, in cases when catechol acts like a key intermediate in their biodegradation pathway.

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This research did not receive any specific grant from funding agencies in the public, commercial, or non-profit sectors.

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Correspondence to Natalia Filipowicz.

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On behalf of all authors, the corresponding author states that there are no conflicts of interest.

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Filipowicz, N., Cieśliński, H. A Rapid and Simple Method for Screening Microorganisms with a Potential for Catechol Biodegradation. Int J Environ Res 14, 87–92 (2020). https://doi.org/10.1007/s41742-019-00239-z

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  • DOI: https://doi.org/10.1007/s41742-019-00239-z

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