Volatile Constituents and Antimicrobial Activity of Naio (Myoporum Sandwicense A. Gray), a Native Hawaiian Tree

Compounds Pub Date : 2023-01-29 DOI:10.3390/compounds3010012
Noura Sayed Dosoky, P. Satyal, A. Sorensen, W. Setzer
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引用次数: 2

Abstract

Myoporum sandwicense A. Gray (naio) is one of the characteristic trees of Hawaiian montane–subalpine mesic forests. In this study, lab-distilled oils of M. sandwicense leaves, wood, and twigs growing on the island of Hawaii, as well as industrially produced wood oils, were characterized by gas chromatography–mass spectrometry (GC-MS). The lab-distilled oils were screened for antimicrobial activity. M. sandwicense leaf essential oil was rich in β-caryophyllene (15.1%), α-humulene (12.8%), germacrene D (7.9%), bicyclogermacrene (12.5%), brigalow ketol (9.6%), and myoporone (16.8%), while the wood essential oils were dominated by α-bisabolol and trans-α-bisabolol oxide B. The sapwood oil was dominated by palmitic acid (35.5%), linoleic acid (19.7%), oleic acid (31.9%), and stearic acid (5.7%), whereas the oil from twigs was rich in tricosane (77.3%) and pentacosane (13.1%). M. sandwicense essential oils were screened for antimicrobial activity against a panel of potentially pathogenic bacteria and fungi. The leaf essential oil of M. sandwicense showed excellent antibacterial activity against S. pyogenes and antifungal activity against A. fumigatus. The wood essential oil showed notable activity against S. pyogenes, A. fumigatus, A. niger, and M. gypseum. The twig oil was remarkably active against mold species. This work is the first report we are aware of on the composition and antimicrobial properties of naio essential oils.
夏威夷土生树Naio (Myoporum sandwich ense a . Gray)挥发性成分及抗菌活性研究
夹心木(Myoporum sandwich ense A. Gray, naio)是夏威夷山地亚高山mesic森林的特色树种之一。本研究采用气相色谱-质谱联用技术(GC-MS)对生长在夏威夷岛的夹心木叶片、木材和树枝的实验室蒸馏油以及工业生产的木材油进行了表征。对实验室蒸馏油进行抑菌活性筛选。夹竹桃叶精油中含有丰富的β-石竹烯(15.1%)、α-葎草烯(12.8%)、竹叶烯D(7.9%)、双环竹叶烯(12.5%)、百里藤酮醇(9.6%)和肌孔酮(16.8%),木材精油中主要含有α-双酚醇和反式α-双酚醇氧化物b。边材精油中主要含有棕榈酸(35.5%)、亚油酸(19.7%)、油酸(31.9%)和硬脂酸(5.7%),而细枝精油中则含有丰富的三聚糖(77.3%)和五聚糖(13.1%)。对一组潜在致病菌和真菌进行了对三明治精油的抗菌活性筛选。夹心叶精油对化脓性葡萄球菌和烟曲霉均有良好的抑菌活性。木挥发油对化脓性葡萄球菌、烟曲霉、黑曲霉和真菌有显著的抑制作用。树枝油对霉菌有显著的抑制作用。这项工作是我们所知道的第一个关于naio精油的组成和抗菌性能的报告。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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CiteScore
2.30
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