Chemical composition and antimicrobial activity of essential oils extracted from Amomum muricarpum Elmer from North Vietnam

D. B. Thin, V. Thanh, B. B. Thinh, Ба Тхин, Ву Кует Тхань, Буй Бао Тхинь
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引用次数: 7

Abstract

Abstract. Recent years have seen the development of bacterial resistance to currently available antibiotics, which necessitates a search for new antimicrobial agents. Amomum muricarpum Elmer is a widely used medicinal plant species in the genus Amomum (family Zingiberaceae) that is commonly found in Laos, the Philippines, China, and Vietnam. The present article describes the chemical composition and antimicrobial activity of essential oils extracted from the leaves and rhizomes of A. muricarpum from North Vietnam. The hydrodistilled essential oil was analyzed using gas chromatography and gas chromatography-mass spectrometry, with the broth microdilution method designed to evaluate its antimicrobial efficacy. The absolute yield of essential oils amounted to 0.11% and 0.13% (v/w) for leaves and rhizomes, respectively, on a dry weight basis. It was found that the leaves and rhizomes of A. muricarpum produce oils abounding in monoterpenes. Of the total identified volatile components in the leaf oil (97.18%), three main constituents include α-pinene (40.45%), linalool (12.34%), and β-pinene (10.31%). In the rhizome oil, the main constituents include α-pinene (48.10%), β-pinene (20.32%), and linalool (7.56%) of the total identified volatile components (98.08%). An antimicrobial activity test indicates that essential oils from the leaves and rhizome of A. muricarpum inhibit the growth of Staphylococcus aureus ATCC 25923, with a minimum inhibitory concentration (MIC) of 200 µg/ml. In addition, the rhizome essential oil also exhibits antimicrobial activity against Bacillus cereus ATCC 14579, with a MIC value of 200 µg/ml. The results indicate the potential of essential oils extracted from A. muricarpum as a source of antimicrobial agents.
北越砂仁精油的化学成分及抑菌活性
摘要近年来,细菌对现有抗生素产生了耐药性,这就需要寻找新的抗微生物药物。砂仁(Amomum muricarpum Elmer)是一种广泛使用的药用植物,属于砂仁属(姜科),常见于老挝、菲律宾、中国和越南。本文研究了从越南北部产的木犀草叶和根茎中提取的精油的化学成分和抑菌活性。采用气相色谱法和气相色谱-质谱法对水蒸馏精油进行分析,并设计肉汤微量稀释法评价其抑菌效果。以干重为基础,叶片和根茎精油的绝对得率分别为0.11%和0.13% (v/w)。结果表明,木犀草的叶和根茎中含有丰富的单萜类化合物。其中,α-蒎烯(40.45%)、芳樟醇(12.34%)和β-蒎烯(10.31%)为主要挥发性成分(97.18%)。在根茎油中,主要挥发性成分为α-蒎烯(48.10%)、β-蒎烯(20.32%)和芳樟醇(7.56%),占总挥发性成分的98.08%。抑菌活性试验表明,金针叶和根茎精油对金黄色葡萄球菌ATCC 25923的生长有抑制作用,最小抑制浓度(MIC)为200µg/ml。此外,根茎精油对蜡样芽孢杆菌ATCC 14579也有抑菌活性,MIC值为200µg/ml。结果表明,金针叶挥发油具有开发抗菌药物的潜力。
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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