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Comparison of antifungal and antioxidant activities of Acacia mangium and A. auriculiformis heartwood extracts

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Mihara, R and Barry, KM and Mohammed, CL and Mitsunaga, T (2005) Comparison of antifungal and antioxidant activities of Acacia mangium and A. auriculiformis heartwood extracts. Journal of Chemical Ecology, 31 (4). pp. 789-804.

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Abstract

The effect of heartwood extracts from Acacia mangium (heartrot-susceptible) and A. auriculiformis (heartrot-resistant) was examined on the growth of wood rotting fungi with in vitro assays. A. auriculiformis heartwood extracts had higher antifungal activity than A. mangium. The compounds 3,4,7,8-tetrahydroxyflavanone and teracacidin (the most abundant flavonoids in both species) showed antifungal activity. A. auriculiformis contained higher levels of these flavonoids (3.5- and 43-fold higher, respectively) than A. mangium. This suggests that higher levels of these compounds may contribute to heartrot resistance. Furthermore, both flavonoids had strong 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity and laccase inhibition. This suggests that the antifungal mechanism of these compounds may involve inhibition of fungal growth by quenching of free radicals produced by the extracellular fungal enzyme laccase

Item Type: Article
Keywords: Acacia mangium - A. auriculiformis - heartrot - heartwood extracts - flavanone - Phellinus noxius - P. badius - antifungal activity - antioxidant - laccase inhibition
Journal or Publication Title: Journal of Chemical Ecology
Page Range: pp. 789-804
Identification Number - DOI: 10.1007/s10886-005-3544-x
Additional Information: The original publication is available at www.springerlink.com
Date Deposited: 11 Oct 2007 05:00
Last Modified: 18 Nov 2014 03:23
URI: http://eprints.utas.edu.au/id/eprint/2091
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