Antifungal Activity of Chitosan on Two Postharvest Pathogens of Strawberry Fruits

Abstract

Effect of chitosan coating on decay of strawberry fruits held at 13 C was investigated. Strawberry fruits were inoculated with spore suspensions of Botrytis cinerea or Rhizopus stolonifer and subsequently coated with chitosan solutions (10 or 15 mg/ml). After 14 days of storage, decay caused by B. cinerea or R. stolonifer was markedly reduced by chitosan coating. Decay was not reduced further when the concentration of chitosan coating was increased from 10 to 15 mg/ml. Coating intact strawberries with chitosan did not stimulate chitinase, chitosanase, or β-1,3-blucanase activities in the tissue as revealed by polyacrylamide gel assays (...)