Affiliation:
1. Department of Biology, University of Patras, 26504 Patras, Greece
Abstract
Microalgae may produce a range of high-value bioactive substances, making them a promising resource for various applications. In this study, the antibacterial activity of twelve microalgae species isolated from lagoons in western Greece was examined against four fish pathogenic bacteria (Vibrio anguillarum, Aeromonas veronii, Vibrio alginolyticus, and Vibrio harveyi). Two experimental approaches were used to evaluate the inhibitory effect of microalgae on pathogenic bacteria. The first approach used bacteria-free microalgae cultures, whereas the second approach used filter-sterilized supernatant from centrifuged microalgae cultures. The results demonstrated that all microalgae had inhibitory effects against pathogenic bacteria in the first approach, particularly 4 days after inoculation, where Asteromonas gracilis and Tetraselmis sp. (red var., Pappas) exhibited the highest inhibitory activity, reducing bacterial growth by 1 to 3 log units. In the second approach, Tetraselmis sp. (red var., Pappas) showed significant inhibition against V. alginolyticus between 4 and 25 h after inoculation. Moreover, all tested cyanobacteria exhibited inhibitory activity against V. alginolyticus between 21 and 48 h after inoculation. Statistical analysis was performed using the independent samples t-test. These findings suggested that microalgae produce compounds with antibacterial activity, which could be useful in aquaculture.
Funder
General Secretariat for Research and Innovation
Subject
Virology,Microbiology (medical),Microbiology
Reference78 articles.
1. Renugadevi, K., Nachiyar, C.V., Nellore, J., Sunkar, S., and Namasivayam, K.R.S. (2022). Handbook of Nutraceuticals and Natural Products, Wiley.
2. Richmond, A. (2004). Handbook of Microalgal Culture: Biotechnology and Applied Phycology, Blackwell Publishing Ltd.. [1st ed.].
3. Health applications of bioactive compounds from marine microalgae;Life Sci.,2013
4. Metabolites from algae with economical impact;Cardozo;Comp. Biochem. Phys. C,2007
5. Irshath, A.A., Rajan, A.P., Vimal, S., Prabhakaran, V.S., and Ganesan, R. (2023). Bacterial Pathogenesis in Various Fish Diseases: Recent Advances and Specific Challenges in Vaccine Development. Vaccines, 11.
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