Akademik Veri Yönetim Sistemi
Journal of Applied Phycology, 2025 (SCI-Expanded)
Cyanobacteria are recognized as promising sources of bioactive compounds with potential application in sustainable plant protection. This study aimed to evaluate the antifungal activity of extracts of selected cyanobacterial strains (Anabaena SS-6, Synechococcus SS-3, Oscillatoria SS-8, Phormidium SS-7) against the phytopathogens Fusarium oxysporum and Fusarium graminearum, and to explore the potential of Oscillatoria SS-8 as a biofungicide in seed treatment.Antifungal activity was tested by agar diffusion, phytochemical screening, FTIR, and GC–MS analyses. A model rice seed inoculation experiment was used to evaluate bioprotective efficacy under controlled conditions. All cyanobacterial extracts inhibited fungal growth with Oscillatoria SS-8 demonstrating the strongest effect (zones: 8.3 ± 0.03 mm and 8.2 ± 0.01 mm, respectively). Phytochemical screening of the Oscillatoria SS-8 extract revealed phenolic compounds, tannins, saponins, and alkaloids. FTIR confirmed functional groups linked to biological activity. GC–MS identified 14 compounds, predominantly lipid substances and fatty acids, some with known antimicrobial activity, suggesting their possible role in biochemical processes and antifungal effects. In model experiments with rice seedlings, the extract reduced Fusarium infection by 53.66% and 53.06%, respectively, compared to untreated controls. Oscillatoria SS-8 demonstrated considerable antifungal potential and may serve as an eco-friendly alternative to chemical fungicides in integrated plant disease management.