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Growth of Paecilomyces variotii fungus on salt-agar medium and on natural and chemically preserved wood

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EN
Abstrakty
EN
Growth of Paecilomyces variotii fungus on salt-agar medium and on natural and chemically preserved wood. Paecilomyces variotii Bainer fungus (Pv) is one of filamentous fungi classified as belonging to Ascomycetes, Deuteromycetes groups, which are able to grow on many of softwood and hardwood species. These fungi (molds) commonly found around the world are responsible for the decrease of functional aesthetics of lignocellulosic materials and even soft rot of wooden materials. The growth of the fungi may be the reason for the drop of the material value, technological difficulties and, eventually, financial loses. It was indicated that Pv may cause yellow discoloration of oak, particularly during kiln drying of wood. The fungus is able to grow on softwood species as well. The aim of this research was to identify the growth rate of Pv fungus on salt-agar medium in comparison to other filamentous fungi and to compare its growth on Scots pine wood both natural and chemically preserved with model wood preservative. It was observed that the growth rate of Pv fungus during double-species tests on salt-agar medium was different depending on the species of the second fungus. Trichoderma viride and Chaetomium globosum fungi limited to some extent the growth of Pv fungus; however, no apparent antagonism was observed. The model wood preservative at 200g/m2 retention effectively controlled the growth of Pv, which in the case of natural Scots pine wood caused complete coverage of the wood surface.
Twórcy
  • Instytut Technologii Drewna
autor
  • Politechnika Łódzka; Wydział Inżynierii Procesowej i Ochrony Środowiska
autor
  • Politechnika Łódzka; Wydział Inżynierii Procesowej i Ochrony Środowiska
Bibliografia
  • 1. Bauch J., Hundt H. v., Weissman G., Lange W., Kubel H., 1991: On the cuses of yellow discolorations of oak heartwood (Quercus Sect. Robur) during drying. Holzforschung 1991, vol. 45, No. 2,79-85.
  • 2. Cofta G., 2006: Żółknięcie drewna dębowego, Forum Przemysłu Drzewnego nr 3/2006.
  • 3. Clausen C. A., Yang V. W., 2003: Mold inhibition on unseasoned southern pine. Proceedings IRG Annual Meeting, IRG/WP 03-10465.
  • 4. Fojutowski A., Koziróg A., Kropacz A., 2012: Wzrost grzybów strzępkowych na drewnie bielu sosny – Ocena subiektywna, pomiar zmiany barwy i oznaczenie ergosterolu. Ochrona przed korozją, 9s/A/2012, 378-383.
  • 5. Fojutowski A., Koziróg A., Kropacz A., 2013: The assessment by visual grading, change of color and ergosterol content ratings, the resistance to mould fungi of treated with wood preservative Scots pine sapwood. Proceedings IRG Annual Meeting, IRG/WP/13-20514.
  • 6. Fojutowski A., Kropacz A., Noskowiak A., 2009: The resistance of thermo-oil modified wood against decay and mould fungi. Proceedings IRG Annual Meeting, IRG/WP/09-40448.
  • 7. Fojutowski A., Kropacz A., Noskowiak A., 2010: Resistance of thermomodified spruce and alder wood to moulds fungi. Ann. WULS – SGGW, For. and Wood Technol., 71, 177-181.
  • 8. Fojutowski A., Kropacz A., Noskowiak A., 2011: The susceptibility of poplar and alder wood to mould fungi attack. Ann. WULS – SGGW, For. and Wood Technol., 74, 56 – 62.
  • 9. Fojutowski A., Kropacz A., Ważny J., 2007: Resistance of Scots pine plywood on mould fungi attacking wood. Ann. War. Univ. of. Life Sciences, For. And Wood Technol., 61, 218-223.
  • 10. Gustafsson S-I., Lundqvist- Gustafsson H., 2008: On yellow discoloration when drying oak, Quercus robur. Drewno-Wood 2008, 51, 179, 29-44.
  • 11. Gutarowska B., 1999: Ergosterol jako wskaźnik zanieczyszczenia grzybami strzępkowymi surowców roślinnych (Ergosterol as contamination rate of plant raw materials by filamentous fungi). Doctoral thesis, Lodz University of Technology.
  • 12. Gutarowska B., Żakowska Z., 2002: Elaboration and application of mathematical model for estimation of mould contamination of some building materials based on ergosterol content determination. International Biodegradation and Biodeterioration, 49, 299-305.
  • 13. Instrukcja ITB nr 355/98 (1998): Ochrona drewna budowlanego przed korozją biologiczną środkami chemicznymi. Wymagania i badania. ITB Warszawa 69.
  • 14. PN-EN 113: 2000/A1:2004 Wood preservatives – Test method for determining the protective effectiveness against wood destroying basidiomycetes – Determination of the toxic values.
  • 15. Seitz L. M., Mohr H. E., Burroughs R., Sauer D. B., 1977: Ergosterol as an indicator of fungal invasion in grains. American Association of Cereal Chemists, 54(6), 1207–1217.
  • 16. WegenerG., Fengel D., 1988: Zum Stand der chemischen und mikroskopischen Untersuchungen an trocknungsverfärbtem Eichenschnittholz. Holz-Zentralbl. 114(145), 2238-2241.
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Bibliografia
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