Comparison of antifungal and antioxidant activities of Acacia mangium and A-auriculiformis heartwood extracts
Comparison of antifungal and antioxidant activities of Acacia mangium and A-auriculiformis heartwood extracts
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DOI：
10.1007/s10886-005-3544-x
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发表时间：
2005-04-01
影响因子：
2.3
通讯作者：
Mitsunaga, T
中科院分区：
文献类型：
--
作者：
Mihara, R;Barry, KM;Mitsunaga, T
马占相思心材浸提液对心腐病敏感株和相思心材浸提液的抗心腐作用。用体外测定法检测了耳状菌（抗心腐）对木材腐烂真菌生长的影响。A.大叶黄杨心材提取物的抑菌活性高于大叶黄杨。芒果化合物3，4 '，7，8-四羟基黄烷酮和teracacidin（两种植物中含量最高的黄酮类化合物）具有抗真菌活性。A. auriculiformis含有更高水平的这些黄酮类化合物（分别为3.5和43倍）比A.芒果这表明，较高水平的这些化合物可能有助于抗心绞痛。两种黄酮类化合物均具有较强的DPPH自由基清除活性和漆酶抑制活性。这表明这些化合物的抗真菌机制可能涉及通过淬灭由胞外真菌酶漆酶产生的自由基来抑制真菌生长。
The effect of heartwood extracts from Acacia mangium (heartrotsusceptible) 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.