Mihara_et_al_JOCE_2005.pdf (511.96 kB)
Comparison of Antifungal and Antioxidant Activities of Acacia mangium and A. auriculiformis Heartwood Extracts
journal contribution
posted on 2023-05-16, 16:13 authored by Mihara, R, Kara BarryKara Barry, Caroline MohammedCaroline Mohammed, Mitsunaga, TThe 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. © 2005 Springer Science + Business Media, Inc.
History
Publication title
Journal of Chemical EcologyVolume
31Issue
4Pagination
789-804ISSN
0098-0331Department/School
Tasmanian Institute of Agriculture (TIA)Publisher
Plenum USPlace of publication
United StatesRepository Status
- Restricted