Fig. 1 shows different sensitivities of strains to different coatings applied on the mangoes. The concentration of chitosan in the coating solution and the presence of the enzyme system affected the fungal decay of the fruit. These studies reported that the antifungal effect of chitosan was dependent on concentration.
These results showed that there was a synergistic effect of chitosan and LPOS. Inhibitory effects increased with the incorporation of LPOS or LPOSI in chitosan at 1 or 1.5% the inhibition
reached about 100%.
Table 1 shows O2 consumption and CO2 produced from uncoated and coated mangoes with 1 and 1.5% of chitosan incorporated with LPOS or LPOSI. Significant differences (p < 0.05) were found with the lowest O2 consumption and highest CO2 production observed for coating mangoes. These results indicated on the whole that chitosan coating reduced the respiration rate of mangoes by decreasing O2 and increasing CO2.The presence of the enzyme system (LPOS or LPOSI) did not affect O2 consumption.