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. 2021 Jul;76(2):231-241.
doi: 10.22092/ari.2020.342066.1450. Epub 2021 Jul 1.

Effect of Carum copticum nano-essence against Saprolegnia and Fusarium, and the Use of Multiplex PCR Assay for the Detection of These Organisms in Rainbow trout Oncorhynchus mykiss

P Tour SavadKouhi  1 , H Ahari  1   1 , A A Anvar  2 , B Jafari  3
Affiliations

Effect of Carum copticum nano-essence against Saprolegnia and Fusarium, and the Use of Multiplex PCR Assay for the Detection of These Organisms in Rainbow trout Oncorhynchus mykiss

P Tour SavadKouhi et al. Arch Razi Inst. 2021 Jul.

Abstract

This study aimed to investigate the fungal species isolation and confirmation by the Multiplex PCR method in aquatic fish. Evaluation of the inhibitory effect of nano-essential oils of Carum copticum on isolated fungal species was also conducted in this study. The PCR results showed that 3 out of 5 samples were diagnosed with Fusarium solani, and two of them were positive for Saprolegnia. Moreover, in 0.1% of the females' nanoparticles, one peak appeared that showed a particle with an average diameter of 360 nm, and two nanoparticles showed a peak with a mean diameter of 242 nm. The results of minimum inhibitory concentrations (MIC) and minimum fungicidal concentrations (MFC) showed that 0.01% nano essential oil had 0.08 and 0.07 mg/ml MIC values against Fusarium solani and Saprolegnia, respectively. Gram/ml was on the growth of Fusarium solani species. The essential oils of female plants had an MIC of 0.07 in 0.1% essential oil and 0.03 mg/ml in 0.01% essential oil in Saprolegnia. Furthermore, in the case of 0.1% nano essential oil, the results showed the MIC values of 0.04 and 0.03 mg/ml against Fusarium solani and Saprolegnia, respectively. The MFC values of 0.1% nano essential oil were 0.1 and 0.07 mg/ml against Fusarium solani and Saprolegnia,respectively. It was not found on Fusarium and Saprolegnia. Overall, the results of this study using PCR for direct detection showed that 70% and 50% of the samples were Fusarium solani and Saprolegnia positive, respectively; therefore, the PCR was an efficient method for the detection of fungi. According to the results of nano-essential oil (0.1%) of females, this nano-essence had a strong inhibitory effect on Fusarium solani and Saprolegnia.

Keywords: Carum copticum; Fusarium; Multiplex PCR; Nano-essence; Oncorhynchus mykiss; Saprolegnia.

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Figures

Figure 1
Figure 1
Result of electrophoresis to identify Fusarium
Figure 2
Figure 2
Result of electrophoresis to identify Fusarium spp.
Figure 3
Figure 3
Result of electrophoresis to identify Saprolegnia
See this image and copyright information in PMC

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