effects of potassium permangenate and storage time on quality of mango fruits (mangifera indica l.)

abstract the effect of different levels of potassium permangenate (kmno4) on quality of mango fruits were studied over a period of 21 days. a factorial trial in the form of complete randomized design as three levels of kmno4 (0, 5 or 10 g. kg-1 fruit) and three time period (7, 14 or 21 days) was used. means were compared using duncan’s test (p< 0.05). compositional parameters (ph, acidity, total soluble solids, density, ascorbic acid and phenolics in pulp and skin) were measured during storage time. results showed that after application of -the highest level of -kmno4 (10 g.kg-1 fruit), treated fruits had significantly higher acidity after 7 days. fruits that treated with 10 g of kmno4 had significantly higher phenolics in pulp after 7 days, but phenolics deceased significantly over control after 21 days. phenolic compounds in fruit skin significantly (p<0.05) remained in high level in fruits treated with the highest level of kmno4 (10 g. kg-1 fruit) after-7 and 14 days. there were no significant differences in decay of mango fruits between all treatments in comparison with control after 14 days, but application of kmno4(10 g. kg-1 fruit) significantly increased fruit decay after 21 days. application of kmno4 had no significant effects on ascorbic acid or gravity.