The plants are essential part of natural ecosystem and existence of life on earth can’t be possible without them. Many plants are reported safe by the Unites States Food and Drug Administration (FDA); which produce essential oils. Essential oils (EOs) are natural, volatile, complex plant compounds1 which can be obtained from different parts of plants. Some EOs exhibits the potential to inhibit of aflatoxins produced by certain fungus. Aflatoxin B1 (AFB1) is a highly toxic and carcinogenic metabolite produced by Aspergillus species. The most significant fungi; which produce the aflatoxins are A. flavus and A. parasiticus 2. Aflatoxins affect cereals, oil seeds, nuts, dry fruits, spices, legumes, fruits, milk and milk derivates3. It has been reported that utilizing food contaminated with aflatoxins especially AFB1 can lead towards hepatic carcinoma and other serious diseases for human beings and livestock4.
EOs including cumin and coriander are non phytotoxic and exhibit antioxidant activity. Cumin (Cuminum cyminum L.) is herbaceous plant used in traditional medicine to treat diseases as toothache, dyspepsia, diarrhea, epilepsy and jaundice6. While, Coriander (Coriandrum sativum L.) is a plant having various uses in cuisines, perfumes and cosmetic products. In traditional medicine, C. sativum L. have been recommended for dyspepsia, loss of appetite, convulsion and insomnia7.
An experiment was performed to investigate the chemical composition of C. cyminum L. and C. sativum L. and to evaluate their antifungal, antiaflatoxin, antioxidant activity and phytotoxicity. For this procedure, both EOs were extracted by hydrodistillation. The chemical characteristics of EOs was determined by GC-MS. Antifungal activity was assessed by poisoned food technique and minimal fungicidal concentration (MFC) and anti aflatoxin effect was checked by broth medium. The antioxidant activity of EOs was determined by DPPH free radical scavenging assay, β-carotene bleaching test and total phenolic content by Folin-Ciocalteu. Phytotoxicity of C. cyminum L. and C. sativum L. EOs were determined for varieties of wheat. The results were analyzed by analysis of variance (one way ANOVA). The outcomes exhibited that both the EOs could inhibit the growth of A. flavus E73 in the range of 24.27-84.90% for C. cyminum and 15.09-65.00% for C. sativum.
This experiment showed that C. cyminum and C. sativum EOs are non-phytotoxic as well as they possess antifungal, anti aflatoxin and antioxidant activity, to control fungi growth. Inspite of the fact, deep investigation is required to transfigure them to more effective fungicides. It will ultimately lead towards less use of chemicals.
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26 May, 2019