Post-harvest treatments of radiation and chemical on organoleptic and biochemical properties of mango (Mangifera indica L.) in relation to delay ripening.
Fuad Hossain, Parvez A. K., Munshi M. K., Ibrahim Khalil, Roksana Huque
Author Affiliation: Department of Microbiology, Jahangirnagar University, Savar, Dhaka-1342, Bangladesh.
American-Eurasian Journal of Agricultural & Environmental Sciences 14 : 555-564
Abstract : The present study was carried out to investigate the effectiveness of chemical (0.2% and 0.3% citric acid and potassium sorbate) and radiation (0.5 and 1.0 kGy) at room and low temperature (4°C) in extending the post-harvest life in relation to delay ripening of mango (Mangifera indica L.) during storage to reduce the postharvest losses which will have direct significant impact on local economy. During this study, Potassium sorbate (0.3%) and irradiated sample (0.5KGy and 1.0KGy) took 7 days to ripe fully at room temperature without any decay. At 4°C temperature, 0.3% potassium sorbate and 1.0 kGy treated samples took 28 days to fully ripe. Reduced rate of moisture and weight loss were found in irradiated sample (1.0 kGy) at both temperature comparing with the other treatments during the storage. A reversible result was attributed between Titratable acidity (TA) and pH. Increasing TSS and significant decline in ascorbic acid were found in all treatments under both temperatures during the storage. At room temperature, reduction in ascorbic acid was low in 1.0 kGy irradiated sample followed by 0.3% citric acid and 0.3% potassium sorbate treated samples from 0 day to 7th day. At 4°C temperature the lowest ascorbic acid loss 1.18 mg was attributed for 0.5 kGy radiation treated followed by 0.3% potassium sorbate (1.22 mg) and 1.0 kGy irradiated sample (1.52 mg). Total phenol content was increased in all treatments during preservation at both temperatures and the highest total phenol content was found in control sample compare to the other treatments. Total flavonoids content was increased with increasing storage period in all treatments at both temperatures. The present study revealed that postharvest treatment of 0.3% potassium sorbate and 1.0KGy radiation was most effective to delay ripening that resulted in extending shelf life of mango.