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首页> 外文期刊>Journal of the Science of Food and Agriculture >Antiaflatoxigenic and antioxidant activity of an essential oil from Ageratum conyzoides L
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Antiaflatoxigenic and antioxidant activity of an essential oil from Ageratum conyzoides L

机译：香叶香精油的抗黄曲霉毒素和抗氧化活性

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BACKGROUND: Aflatoxin contamination of various commodities can occur as a result of infection, mainly by Aspergillus flavus and Aspergillus parasiticus. Every year, almost 25% of the world's food supply is contaminated by mycotoxins. Aflatoxins B, B, G and G, which occur naturally, are significant contaminants of a wide variety of commodities. A number of biological activities have been associated with Ageratum conyzoides. We have therefore investigated the antiaflatoxigenic, antioxidant and antimicrobial activity of essential oils of A. conyzoides. This could help to turn A. conyzoides, a nuisance weed, into a resource.RESULTS: The essential oil of Ageratum conyzoides L. shows the presence of 12 compounds when analyzed by gas chromatography-mass spectrometry. The growth and aflatoxin production of the toxigenic strain Aspergillus parasiticus was completely inhibited by essential oil. All the studied concentrations of the oil demonstrate a reduction in mycelia growth and decreased production of different aflatoxins in fungi, as revealed by liquid chomatographic-tandem mass spectrometric analysis. Volatiles from macerated green leaf tissue of A. conyzoides were also effective against A. parasiticus. The strongest antibacterial activity was observed against the bacteria Staphylococcus aureus and Bacillus subtilis in a disk diffusion bioassay. Essential oil and methanol extract of A. conyzoides L. were assayed for their antioxidant activity. Methanol extract showed the highest antioxidant activity in FRAP and DPPH assay, whereas essential oil showed greater lipid peroxidation inhibition than methanol extract.CONCLUSION: The plant's ethno-medicinal importance, antioxidant potential, inhibitory activity against the Aspergillus group of fungi and production of aflatoxins may add a new dimension to its usefulness in the protection of stored product. Copyright
机译：背景：黄曲霉毒素的感染可导致各种商品的黄曲霉毒素污染，主要是由黄曲霉和寄生曲霉引起的。每年，全球约25％的食物供应都受到霉菌毒素的污染。天然存在的黄曲霉毒素B，B，G和G是多种商品的重要污染物。香叶香茅有许多生物学活性。因此，我们研究了香菜曲霉精油的抗黄曲霉毒素，抗氧化剂和抗菌活性。结果：气相色谱-质谱联用法分析香叶香精油具有12种化合物的存在。精油完全抑制了产毒副寄生曲霉的生长和黄曲霉毒素的产生。如液相色谱-串联质谱分析所揭示的，所有研究的油浓度都表明菌丝体生长减少，真菌中不同黄曲霉毒素的产量降低。肉芽孢杆菌的浸软的绿叶组织中的挥发物也有效对抗寄生虫。在圆盘扩散生物测定中观察到对金黄色葡萄球菌和枯草芽孢杆菌的最强抗菌活性。测定了y草的精油和甲醇提取物的抗氧化活性。结论甲醇提取物在FRAP和DPPH分析中显示出最高的抗氧化活性，而精油则显示出比甲醇提取物更大的脂质过氧化抑制作用。在保护存储产品方面增加了新的用途。版权

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