Journal
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
Volume 64, Issue 2, Pages 156-161Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ibiod.2009.12.006
Keywords
Ganoderma lucidum; Herbicides; Laccase
Funding
- Foundation for Research Support of Parana (Fundacao Araucaria)
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The effect of the herbicides bentazon and diuron on growth and production of ligninolytic enzymes by the white-rot fungus Ganoderma lucidum, cultured in glucose liquid media, was evaluated. G. lucidum was resistant to the herbicides. The degree of resistance, however, was not the same for both compounds; the upper limits were 20 mM for bentazon, but only 80 mu M for diuron. Furthermore, strong improvement of the laccase activity associated with growth reduction was observed during the first 48 h after the addition of the herbicides. Two laccase isoforms (lac 1 and lac 2) were found in the non-induced cultures. The herbicides acted as inducers of lac 2 and repressors of lac 1. Analysis of the residual herbicides showed that G. lucidum was able to remove both bentazon and diuron and, as with other white-rot fungi, it can be considered to be potentially useful in the development of methods aiming to reduce contamination by herbicides. (C) 2010 Elsevier Ltd. All rights reserved.
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