Phenolic removal of olive-mill dry residues by laccase activity of white-rot fungi and its impact on tomato plant growth

We studied the influence of the laccase activity of two white-rot fungi on the toxic effect of water-soluble substances from dry residues of olives (ADOR) on tomato plants. Pycnoporus cinnabarinus and Coriolopsis rigida decreased the phenol content of ADOR to 73% after 15 days. P. cinnabarinus and C...

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Bibliographic Details
Published in:International biodeterioration & biodegradation 2006-10, Vol.58 (3), p.176-179
Main Authors: Aranda, E., Sampedro, I., Ocampo, J.A., García-Romera, I.
Format: Article
Language:English
Subjects:
Laccase
Lycopersicon esculentum
Olea
Olive-mill dry residue
Phytotoxicity
Pycnoporus cinnabarinus
White-rot fungi
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Summary:We studied the influence of the laccase activity of two white-rot fungi on the toxic effect of water-soluble substances from dry residues of olives (ADOR) on tomato plants. Pycnoporus cinnabarinus and Coriolopsis rigida decreased the phenol content of ADOR to 73% after 15 days. P. cinnabarinus and C. rigida produced laccase activity after 5 and 15 days, respectively, and the highest activity in both fungi was detected at 20 days. The treatment of ADOR with these white-rot fungi decreased the phytotoxicity of this residue on tomato plants. A close relationship was found between the amount of laccase produced, the decrease in phenol content of ADOR by the saprobic fungi, decrease of phytotoxicity of ADOR, and the increase in dry weight of tomato plants. These results show that phenol removal by the laccase activity of white-rot fungi can be important in the elimination of phytotoxic substances present in olive-mill dry residues.
ISSN:0964-8305
1879-0208
DOI:10.1016/j.ibiod.2006.06.006