Effect of guar gum-chitosan composites edible coating functionalized with essential oils on the postharvest shelf life of Khasi mandarin at ambient condition

Int J Biol Macromol. 2023 Oct 16:127489. doi: 10.1016/j.ijbiomac.2023.127489. Online ahead of print.ABSTRACTIn the present study, the effects of guar gum (0.7 %):chitosan (0.3 %) based composite edible coating functionalized with coconut oil and essential oils like clove bud oil and cinnamon bark oil were investigated on the postharvest shelf life of Khasi mandarins at ambient conditions (25 ± 5 °C, RH 75 ± 5 %) up to 20 days of storage period. The postharvest characteristics such as weight loss, firmness, acidity, total soluble solids (TSS) and reducing sugar of control and treated fruits were evaluated at 5 days intervals throughout the storage period. The obtained results indicated that the application of guar gum/chitosan-based composite edible coating with coconut oil, clove bud, and cinnamon essential oil was effective in prolonging the postharvest shelf life of Khasi mandarins as compared to control fruits by minimizing the decay and loss of postharvest quality attributes. The treatment of composite such as guar gum/chitosan/coconut oil/clove oil/cinnamon oil (GGCsC-Cl-Cn) was most effective in maintaining postharvest characteristics of fruits compared to other treatments and control. The significant (p < 0.05) lowest weight loss (38 %) with retention of higher firmness (5.9 N), titratable acidity (0.29 %), and total soluble solid (10.8 %) was noticed in the Khasi mandarins treated with GGCsC-Cl-Cn composite coating on 20 days of storage. Furthermore, the present...
Source: International Journal of Biological Macromolecules - Category: Biochemistry Authors: Source Type: research