Aspects regarding micromycetes involvement in wood biodeterioration

The micromycetes, as a result of mycelia growth and development on wooden surfaces,produce their physical and chemical degradation. We studied various wood samples, on differentdeciduous types: linden (Tilia platyphyllos) used as prop for icons in our country, hornbeam (Carpinussp.) and oak (Quercus sp.). The samples have different durability, density, strength and degrees ofhumidity. After 30 days of incubation at a temperature of 30±2°C and a relative humidity of the air ofover 90%, which are favorable conditions for the development of fungi, the samples of lime andhornbeam being used on a Czapek-Dox medium of culture (no extra carbon source), there were isolatedlignolitic fungi – Chaetomium globosum and Paecilomyces variotii, as well as species that degrade pulp:Trichoderma viride, Myrothecium verrucaria, and species of Aspergillus and Penicillium. Thequantification of the weight variation in wood pieces, as well as in sawdust, and the optical microscopyshowed the involvement of fungi in the structural changes of wood. By the methods that we used, wetried to point out, on one hand, the load level of the mycoflora depending on the wood type (healthy, notattacked) and on its humidity and, on the other hand, the beginning of some bio-deterioration processes(changes in the structure of pulp). The purpose of this work is the application of a proper antifungictreatment to lime wood that is used as a prop for icons.