Volume 22, Issue 163 (2025)
FSCT 2025, 22(163): 173-189 |
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Pourhashemi M, Hashemiravan M, Zand N, Shahab A. Evaluation of the effect of Daphne odora essential oil on reducing the number of Aspergillus niger inoculated colonies on red guava fruit. FSCT 2025; 22 (163) :173-189
URL: http://fsct.modares.ac.ir/article-7-77466-en.html
URL: http://fsct.modares.ac.ir/article-7-77466-en.html
1- st..
2- PHD ,m_hashemiravan@yahoo.com
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3- Ph.D
Abstract: (86 Views)
This study evaluated the effect of Daphne odora essential oil (Syzygium aromaticum) on reducing Aspergillus niger colony counts in red-fleshed guava fruits. The objective of the research was to investigate the antimicrobial effects of Daphne odora essential oil at different concentrations on guava fruits infected with Aspergillus niger. For this purpose, various concentrations of Daphne odora essential oil (0.4, 0.5, 0.6, 0.7, and 0.8 mg per 100 g of fruit) were injected into the guava fruits, which were then inoculated with Aspergillus niger. The antimicrobial effects of Daphne odora essential oil were assessed by measuring mold colony counts, pH, texture firmness, weight loss percentage, moisture content, and color changes in the fruits on days 1, 7, 14, 21, and 28 at a temperature of 15-18°C. The results showed that Daphne odora essential oil significantly reduced the colony counts of Aspergillus niger. The highest reduction in mold colonies was observed at a concentration of 0.7 mg per 100 g of fruit, leading to a 2.29 log reduction in microbial load. Furthermore, weight loss percentage and pH changes were improved. Compared to untreated samples, those treated with higher concentrations of Daphne odora essential oil showed a significant reduction in weight loss percentage and tissue damage. The results of the DPPH antioxidant assay also indicated high antioxidant activity of Daphne odora essential oil. In conclusion, clove essential oil demonstrates potential as an effective antimicrobial agent for reducing Aspergillus niger contamination and improving the quality of red-fleshed guava. It could be utilized for managing post-harvest fruit decay.
Article Type: Original Research |
Subject:
Essences and extracts
Received: 2024/10/13 | Accepted: 2025/03/11 | Published: 2025/08/23
Received: 2024/10/13 | Accepted: 2025/03/11 | Published: 2025/08/23
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