AI Article Synopsis
- The study explored how the bacterium Corynebacterium glutamicum can break down phenol in contaminated soil, showing that adding 1% yeast extract significantly boosted its effectiveness.
- Toxicity tests with Daphnia magna revealed that the soil became non-hazardous after phenol removal, indicating safety for the ecosystem.
- Treatment with C. glutamicum not only degraded phenol but also enriched the soil with amino acids, improving seed germination and root growth in oats, suggesting enhanced soil health and plant support.
Article Abstract
The biodegradation of phenol in laboratory-contaminated soil was investigated using the Gram-positive soil bacterium Corynebacterium glutamicum. This study showed that the phenol degradation caused by C. glutamicum was greatly enhanced by the addition of 1% yeast extract. From the toxicity test using Daphnia magna, the soil did not exhibit any hazardous effects after the phenol was removed using C. glutamicum. Additionally, the treatment of the phenolcontaminated soils with C. glutamicum increased various soil amino acid compositions, such as glycine, threonine, isoleucine, alanine, valine, leucine, tyrosine, and phenylalanine. This phenomenon induced an increase in the seed germination rate and the root elongation of Avena sativa (oat). This probably reflects that increased soil amino acid composition due to C. glutamicum treatment strengthens the plant roots. Therefore, the phenol-contaminated soil was effectively converted through increased soil amino acid composition, and additionally, the phenol in the soil environment was biodegraded by C. glutamicum.
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| http://dx.doi.org/10.4014/jmb.1108.08089 | DOI Listing |
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