Biodeterioration of some herbal raw materials by storage fungi and aflatoxin and assessment of Cymbopogon flexuosus

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• 作者：Ashok Kumar ; Ravindra Shukla ; Priyanka Singh ; Nawal Kishore Dubey
• 关键词：Aflatoxin B₁ ; Aspergillus flavus ; Biodeterioration ; Cymbopogon flexuosus ; Eugenol ; Micromycetes ; Raw materials
• 刊名：International Biodeterioration and Biodegradation
• 出版年：2009
• 出版时间：September 2009
• 年：2009
• 卷：63
• 期：6
• 页码：712-716
• 全文大小：136 K

文摘

Deterioration of raw materials of six medicinal plants viz. Terminalia arjuna, Acorus calamus, Rauvolfia serpentina, Holarrhena antidysenterica, Withania somnifera and Boerhaavia diffusa was examined. Some of the contaminated raw materials were found to be deteriorated by toxigenic strains of Aspergillus flavus and contain aflatoxin B₁ (41.0–95.4 μg kg⁻¹) which is above the permissible limit. Essential oil of Cymbopogon flexuosus and its components was found efficient in checking fungal growth and aflatoxin production. C. flexuosus essential oil absolutely inhibited the growth of A. flavus and aflatoxin B₁ production at 1.3 μl ml⁻¹ and 1.0 μl ml⁻¹ respectively. The individual oil components were more efficacious than the Cymbopogon oil as such which emphasizes masking of their efficacy when combined together. Eugenol exhibited potent antifungal and aflatoxin inhibitory activity at 0.3 μl ml⁻¹ and 0.1 μl ml⁻¹ respectively. Eugenol was found superior over some prevalent synthetic antimicrobials and exhibited broad fungitoxic spectrum against some biodeteriorating moulds. Prospects of exploitation of the oil and its components as acceptable plant based antimicrobials in qualitative as well as quantitative control of biodeterioration of herbal raw materials have been discussed.