Antifungal Potency of Essential Oil Components of African Ginger - Zingiber officinale (Roscoe)

Sustainable Food Production Pub Date : 2018-12-01 DOI:10.18052/WWW.SCIPRESS.COM/SFP.4.20

A. A. Markson, N. N. Kalu, P. I. Akwaji

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Abstract

The antifungal potency of essential oil ofzingiber officinale(Roscoe) (African Ginger) was investigated using the hyphal extension bioassay. The essential oil (vacuum distillate) was obtained through vacuum distillation. Gas chromatography-mass spectrometry analysis of the oil revealed 27 compounds with six compounds (1.8-Cineole, α-Pinene, Camphene, (E,E)-α-Fanesene, Geranial and Zingiberene) showing major biological activity. Results of antifungal screening of the bioactive blend from these compounds and vacuum distillate in comparison with four synthetic fungicides revealed that the bioactive blend was more effective against the test pathogen –Botryodiplodia theobromae(Pat.) in culture allowing the shortest hyphal lengths of 1.12cm, 0.28cm and 0.18cm at 50, 75 and 100μg/ml concentration compared with 3.39cm, 0.77cm and 0.28cm respectively obtained for forcelet (the best fungicide tested). Vacuum distillate was comparable (P<0.05) in performance to the bioactive blend. These two plant-based chemicals were persistent in their action againstB. theobromaeat all levels of concentration throughout the course of the experiment.

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非洲姜(Zingiber officinale)精油成分的抗真菌活性

采用菌丝延伸生物测定法研究了非洲姜精油的抑菌活性。通过真空蒸馏得到精油(真空馏出物)。气相色谱-质谱联用分析结果显示，油中27个化合物中有6个化合物(1.8-桉树脑、α-蒎烯、Camphene、(E,E)-α-Fanesene、gerial和Zingiberene)具有主要的生物活性。结果表明，在50、75和100μg/ml的浓度下，该生物活性混合物对试验病原菌牛油双plodia theobromae(Pat.)具有较好的抑菌效果，菌丝长度最短，分别为1.12cm、0.28cm和0.18cm，而杀菌剂forcelet的菌丝长度最短，分别为3.39cm、0.77cm和0.28cm。真空蒸馏液的性能与生物活性混合物相当(P<0.05)。这两种基于植物的化学物质对b的作用是持久的。可可酸在整个实验过程中的浓度都是不同的。

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Sustainable Food Production

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