DEGRADATION OF THEEUCALYPTUS SP. WOOD BY WHITE-ROT BASIDIOMYCETES FUNGI

ABSTRACT

The effect of the Eucalyptus sp. degradation by basidiomycetes Pleurotus ostreatus, Pycnoporus cinnabarinus and Schizophyllum commune in vitroand in field conditions was analyzed. The trataments in vitro were: T1 control; T2 5 mL of water; T3 10 mL of water; T4 – potato-dextrose-agar medium. The analyzed parameter was wood weight loss (%), after 60 and 120 days of incubation. In field conditions blocks of Eucalyptus were inoculated with “spawn” of Pleurotus ostreatus, Pycnoporus cinnabarinus and Schizophyllum commune. The following treatments were realized: T1 control (without water and inoculum); T2 – submerged blocks for 24 h in water and T3 not submerged blocks for 24 h in water. The analyzed parameter was the wood weight loss (%), after 60 and 120 days of incubation. The degradation of Eucalyptus sp. in vitro and in field conditions was influenced by the isolate. The wood of Eucalyptus sp., in vitro, inoculated with Pycnoporus cinnabarinus had presented, on average, 25.33% weight loss and micelium was more vigorous in relation to thePleurotus ostreatus andthe Schizophyllum commune isolates. The employed treatments and the incubation period,in vitro, had not influenced the weight loss of the Eucalyptus sp. wood. In field conditions, the weight loss of wood the Eucalyptus sp. inoculated with Pycnoporus cinnabarinus was of 15.79%, already with Pleurotus ostreatus was 12.45% and Schizophyllum commune 12.95%.

KEY WORDS
Biodegradation; fungi; biotechnology