Effect of abiotic factors on the stability of chosen oligopeptides isolated from the freshwater cyanobacterium Woronichinia naegeliana

Abstract Cyanobacterial blooms have a significant impact on water quality. Implementing appropriate treatment methods to remove cyanobacterial secondary metabolites requires assessing their stability. In contrast cyanotoxins, the effect of abiotic factors cyanopeptides has been poorly studied. The present study analysed pH, temperature, visible and ultraviolet (UV) radiation stability chosen oligopeptides found in freshwater cyanobacterium Woronichinia naegeliana bloom that frequently appears drinking reservoirs worldwide. tested cyanopeptolin 1081 (CYA-1081) anabaenopeptin 899 (ANB-899) were relatively stable at room temperature for 12 weeks regardless pH. However, boiling (100 °C) one hour affected partial decomposition compounds pH-dependent manner; highest decrease initial content CYA-1081 47.0% was recorded pH 9, while ANB-899 42.4% 3. resistant radiation, but UV an acidic condition caused its degradation by 32.3%. Treatment with or 3 h maximum reduction 40.4 70.8%, respectively, presented data provided information affecting persistence may be useful search development effective removing metabolites.