اثر چیتوزان بر افزایش عمر پس از برداشت و ویژگی های کیفی انگور رقم شاهرودی

Chitosan as a biopolymer has numerous applications in agriculture. Coating fruit and vegetables with chitosan has some positive advantages for the long-term storage of them, because the film of chitosan provides a kind of an active package which inhibits fungal growth and maintains the quality properties of the fruit for a longer time. In this study, the effects of chitosan in extending shelf life of grape (Shahroodi) and quality properties were investigated. The fruits were treated with aqueous solutions of 0.5 and 1% chitosan and then stored at 2°C and 90% relative humidity for 90 days. Changes in weight loss, color, pH, decay and sensory quality were measured. Results suggested that chitosan reduces weight loss, decay, browning, cracking and shatter also increases quality of berries. However, there was no significant different between two chitosan coating concentrations, but in some cases 1% chitosan showed better results than 0.5% for shelf life extension and quality maintaining.