The growth of Trichoderma viride fungus on an agar and wood substrate
Journal Title: Annals of WULS, Forestry and Wood Technology; Zeszyty naukowe SGGW - Year 2016, Vol 94, Issue
Abstract
The growth of Trichoderma viride fungus on an agar and wood substrate. The Trichoderma viride (Tv) fungus is one of several dozen of currently accepted species the Trichoderma genus. It is a filamentous fungus belonging to Division Ascomycota. The Trichoderma fungi are present in soils at all latitudes and on freshly cut sawn wood of many softwood and hardwood species. The growth of the fungi (molds) on wood surfaces may cause the decrease of value of sawn goods due the drop of functional aesthetics of lignocellulosic materials. The Trichoderma fungi produces a wide range of enzymes as cellulose, hemicellulase, xylanase and chitinase, so they are able to cause at favourable conditions even soft rot of wooden materials. The growth of the fungi is often characterized as opportunistic, avirulent plant symbionts. The identification of the growth rate of Tv fungus in comparison to the growth rate of other filamentous fungi on salt-agar medium and on natural and chemically treated with model wood preservative Scots pine wood were the aim of the research, as well as testing the objectified, instrumental measurement of the effect of chemical protection of wood against fungi by measurement of ergosterol content. Tv fungus demonstrated the fastest growth rate between tested fungi in onespecies test. The growth rate of Tv during double-species tests on salt-agar medium was also very fast, however limited to some extent because of growth of other species of fungi in the same Petri dish. The second fungus: Aspergillus niger, Chaetomium globosum and Paecilomyces variotii fungi more limited the growth of Tv fungus; than Ophiostoma piliferum and Penicillium funiculosum fungi. The antagonism between fungi was however not stated. The mycelium of Tv fungus during test has completely covered the surface of natural Scots pine wood but the model wood preservative at 200g/m2 retention effectively controlled the growth of Tv. The inhibition of Tv growth was confirmed by determination of ergosterol content, which demonstrated different grade of protection dependent of retention of wood preservative in wood.
Authors and Affiliations
Andrzej Fojutowski, Aleksandra Kopacz, Anna Koziróg
Keywords
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