Journal
FOOD CHEMISTRY
Volume 211, Issue -, Pages 616-623Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2016.05.098
Keywords
Liposomes; Phenolic compounds; Fungal inhibition; Fusarium
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This study aimed to investigate the antifungal activity of liposomal systems containing Spirulina sp. LEB-18 phenolic extract (PE) against Fusarium graminearum (Fg) isolates. The interaction between PE and phosphatidylcholine-based liposomes was monitored by HATR-FTIR, NMR, DSC, and cryo-TEM. After encapsulation, the active principle was released slower than the free PE, a fact that makes the former very promising as a natural antifungal. The PE encapsulation in the liposomes was responsible for changes in the dynamics of specific regions. These compounds affected the membrane hydration degree, ordered the lipid phosphate region and increased the disorder of the acyl chain methylenes. These physicochemical effects may be related to the strong inhibition of four Fg isolates. Results were discussed by correlating structural similarities, as well as the membrane effects of the PE under study on antifusarium activities, and those found in the literature, thus enabling the PE mechanisms of action to be analyzed. (C) 2016 Elsevier Ltd. All rights reserved.
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