期刊
FOOD AND CHEMICAL TOXICOLOGY
卷 106, 期 -, 页码 175-184出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.fct.2017.05.043
关键词
Mentha cardiaca; Essential oil; Antifungal; Antiaflatoxigenic; Antioxidant; Preservative
资金
- Council of Scientific and Industrial Research (CSIR) New Delhi [09/013(0516)/2013-EMR-I]
- Interdisciplinary School of Life Sciences, Banaras Hindu University, Varanasi
- DST- PURSE, Banaras Hindu University, Varanasi
- DST-FIST, Banaras Hindu University, Varanasi
The study reports Mentha cardiaca essential oil (EO) as plant based preservative against fungal and aflatoxin contamination of stored dry fruits. Mycoflora analysis of the dry fruits revealed Aspergillus favus LHP-PV-1 as the most aflatoxigenic isolate with highest Aflatoxin B-1 content. M. cardiaca EO showed broad fungitoxic spectrum inhibiting the tested moulds contaminating dry fruits. It's minimum inhibitory concentration (MIC), minimum aflatoxin inhibitory concentration (MAIC) and minimum fungicidal concentration (MFC) against A. favus LHP-PV-1 were recorded to be 1.25, 1.0 and 2.25 mu L/mL respectively. The EO caused decrease in ergosterol content and enhanced leakage of Ca2+, K+ and Mg2+ ions from treated fungal cells, depicting fungal plasma membrane as the site of antifungal action. The 80 showed promising DPPH free radical scavenging activity (IC50 value:15.89 mu L/mL) and favourable safety profile with LD50 value (7133.70 mg/kg body wt.) when estimated through acute oral toxicity on mice. Carvone (61.62%) was recorded as the major component of the oil during chemical characterisation through GC-MS. Based on strong antifungal, antiaflatoxigenic and antioxidant potential, the chemically characterised M. cardiaca EO may be recommended as safe plant based preservative and shelf life enhancer of food items. This is the first report on antifungal and antiaflatoxigenic activity of M. cardiaca EO. (C) 2017 Elsevier Ltd. All rights reserved.
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