Autoregulatory Properties of (+)-Thujopsene and Influence of Environmental Conditions on Its Production by <Emphasis Type="Italic">Penicillium decumbens</Emphasis> |
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Authors: | Viviana Polizzi Lisa Fazzini An Adams Anna Maria Picco Sarah De Saeger Carlos Van Peteghem Norbert De Kimpe |
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Institution: | (1) Faculty of Bioscience Engineering, Department of Sustainable Organic Chemistry and Technology, Ghent University, Coupure Links 653, 9000 Ghent, Belgium;(2) Faculty of Pharmaceutical Sciences, Laboratory of Food Analysis, Ghent University, Harelbekestraat 72, 9000 Ghent, Belgium;(3) Faculty of Sciences, Department of Territorial Ecology and Environment, Pavia University, Via S. Epifanio 14, 27100 Pavia, Italy; |
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Abstract: | A Penicillium decumbens strain was collected from a water-damaged building, and the production of microbial volatile organic compounds (MVOCs) was
investigated by means of headspace solid-phase microextraction, followed by GC-MS analysis. The strain was characterized by
a high production of (+)-thujopsene. The influence of various temperatures, relative humidity (RH) values, substrates, and
inoculum concentrations on fungal growth and (+)-thujopsene production was studied. The optimal temperature and relative humidity
for P. decumbens growth were 30°C and 100% RH, respectively. In general, the more favourable the incubation parameters were for growth, the
faster maximum (+)-thujopsene production was reached. Moreover, the antifungal activity of thujopsene was tested against 16
fungal strains. The growth of five of these fungal strains was negatively affected both by thujopsene alone and when grown
in contact with the MVOCs produced by P. decumbens. Following these results and since growth of P. decumbens itself was also inhibited by thujopsene, an autoregulatory function for this compound was proposed. Few data are present
in the literature about chemical communication between fungi. The present research could, therefore, contribute to understanding
fungal metabolism and behaviour in indoor environments. |
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