Assessing essential oil components as plant-based preservatives against fungi that deteriorate herbal raw materials

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• 作者：Prashant Kumar Mishra^a ; Priyanka Singh^a ; Bhanu Prakash^a ; Akash Kedia^a ; Nawal Kishore Dubey^a ; ^{nkdubey2@rediffmail.com} ; C.S. Chanotiya^b
• 关键词：Aflatoxin B1 ; Antifungal ; Antioxidant ; Aspergillus flavus ; Essential oil components
• 刊名：International Biodeterioration and Biodegradation
• 出版年：2013
• 出版时间：May, 2013
• 年：2013
• 卷：80
• 期：Complete
• 页码：16-21
• 全文大小：195 K

文摘

This study assesses the antifungal efficacy of 14 essential oil (EO) components and some of their combinations as inhibitory to the growth of the aflatoxigenic fungus Aspergillus flavus LHPA₉ isolated from biodeteriorating Asparagus racemosus herbal raw materials. The aim was to determine whether they could be recommended as plant-based preservatives for enhancement of the shelf life of herbal raw materials. Thymol, eugenol, menthol, and their combinations were highly efficacious as their minimum inhibitory concentration (MIC) for inhibition of fungal growth as well as aflatoxin B₁ secretion was less than 1.0?¦Ìl?ml^?1. Geranyl acetate, linalool, ¦Â-asarone, 1, 8-cineol, and E-citral were moderately antifungal as their MIC ranged between 1.0 and 5.0?¦Ìl?ml^?1. During antioxidant activity 2, 2-diphenyl-1-picrylhydrazyl assay, thymol, eugenol, and ¦Â-caryophyllene showed strong radical scavenging activity, whereas ¦Â-asarone and p-cymene showed moderate activity. Some combinations of EO components showed synergism while others exhibited an additive or antagonism effect in their activity. The findings point to a recommendation that EO components are good alternatives to synthetic preservatives to prevent deterioration of stored herbal raw materials by fungal and aflatoxin contamination and free-radical oxidation.