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Chemical composition, antioxidant and bioactivities of essential oils from Melaleuca bracteata leaves

机译：Melaleuca Bracteata叶片精油的化学成分，抗氧化剂和生物活性

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Melaleuca bracteata possesses antioxidant, antibacterial, and herbicidal activities. However, the agricultural applications of M. bracteata have not been explored yet. The M. bracteata leaves were distilled, and the petroleum ether extract of the essential oils (PEEO) was analysed by GC-MS, where methyl eugenol was found to be the most abundant (66.68%). The total polyphenol content (TPC), the total flavonoids content (TFC) of the PEEO were 6.617 ± 0.535 mg gallic acid equivalents/g and 7.086 ± 0.452 mg rutin equivalents/g, respectively. The IC50 values of the DPPH, ABTS and Fe3+ were 4.180 ± 0.050 mg/ml, 5.400 ± 0.140 mg/ml, and 8.935 ± 0.067 mg/g, respectively. The EC50 value of the PEEO was 33.78 ± 2.35 μg/ml against the Pyricularia oryzae. The minimum inhibitory concentration and minimum bactericidal concentration values were 0.10 mg/ml and 0.45 mg/ml against Bacillus subtilis. The results indicate that M. bracteata PEEO possesses excellent antioxidant activities and bioactivities.
机译：Melaleuca Bracteata拥有抗氧化剂，抗菌和除草活性。然而，尚未探讨M. Bracteata的农业应用。蒸馏芽孢杆菌叶，通过GC-MS分析精油（PEEO）的石油醚提取物，其中发现甲基丁醇是最丰富的（66.68％）。 PEEO的总多酚含量（TPC），总黄酮含量（TFC）分别为6.617±0.535 mg，分别为7.086±0.452mg牛丁当量/ g。 DPPH，ABTS和Fe3 +的IC 50值为4.180±0.050mg / ml，5.400±0.140mg / ml，分别为8.935±0.067 mg / g。 Peeo的EC50值为33.78±2.35μg/ ml对肌瘤的肌肉炎。最小抑制浓度和最小杀菌浓度值为0.10mg / ml，对枯草芽孢杆菌芽孢杆菌0.45mg / ml。结果表明，M. Bracteata Peeo具有优异的抗氧化活性和生物活性。

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