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Scanning electron micrographs of mycelia of A. alternata (A) in the absence of chitosan, A. alternata (B) treated with 500 µg × mL-1 chitosan A (DP 1,089 and FA 0,16); R. stolonifer (C) in the absence of chitosan and R. stolonifer (D) treated with 500 µg × mL-1 chitosan A (DP 1,089 and FA 0,16). Magnification 1,000×. (E) Spore and germ tube of Alternaria alternata after 5 days of culture at 25 °C with medium amended with chitosan P (1,000 mg × mL-1). Magnification at 2,500×.
