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Susceptibility of painted wood to Aureobasidium pulluians: fungal stain and growth patterns

Anfälligkeit von Farbanstrichen auf Holz gegen Aureobasidium pullans: Verfärbung und Wachstumsmuster

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Abstract

Wooden blocks of Norway spruce were coated with different paint formulations. Water- and solvent-borne model and commercial paints were used. The coated wooden blocks were inoculated with a spore suspension of Aureobasidium pullulans (de Bary) Arnaud and placed in an environment of high humidity for 14 months. Different levels of fungal stain and variable growth patterns were observed on the different coated samples. Fungal growth in the form of hyphae was observed on the paints that became heavily stained, and yeast-like cells occurred on the paints that became less stained by the fungus. Towards the end of the incubation period commercial paints containing a fungicide became more stained than the same paint formulations without fungicide.

Zusammenfassung

Fichtenblöcke wurden mit verschiedenen Anstrichsystemen beschichtet. Experimentelle und kommerzielle Anstriche auf Wasser- und Lösemittelbasis wurden verwendet. Die beschichteten Blöcke wurden mit einer Sporensuspension von Aureobasidium pullans (de Bary) Arnaud inkubiert und bei hoher Feuchte 14 Monate lang gelagert. Verschiedene Grade der Verfärbung und Wachstumsmuster wurden registriert. Hyphenentwicklung war vor allem bei stark verfärbten Farbschichten zu beobachten, während auf weniger verfärbten Proben die Pilze eher Hefezellen glichen. Gegen Ende der Testzeit waren die kommerziellen Anstriche, die Fungizide enthielten, stärker verfärbt als die gleichen Anstriche ohne Fungizide.

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The present work was carried out as part of the project “Microbial Susceptibility of Painted Wood within a research program on wood quality Träkvalitet”. This program was financed by The Swedish Council for Forestry and Agricultural Research (SJFR), Swedish National Board for Industrial and Technical Development (NUTEK), The Swedish Sawmill Industries, and Södra skogsägarna.

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Bardage, S.L. Susceptibility of painted wood to Aureobasidium pulluians: fungal stain and growth patterns. Holz als Roh- und Werkstoff 56, 359–364 (1998). https://doi.org/10.1007/s001070050333

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