Kirazda Hasat Sonrası Kitosan ve Aloe vera Uygulamalarının Soğukta Muhafaza Süresince Kalite Özelliklerine Etkisi

Kiraz hasattan sonra sertlik ve renk kaybı, sap kararması ve çürüme nedeniyle kalite özelliklerini hızla kaybetmekte ve muhafaza süresi kısalmaktadır. Kalitenin korunması ve muhafaza süresinin uzatılması amacıyla kirazlarda hasat sonrası yapılan uygulamaların önemi oldukça yüksektir. Soğukta muhafaza süresince yüksek solunum oranının azaltılması bu sürenin uzatılmasında oldukça etkili olmaktadır. Bu çalışmada Konya ili Akşehir ilçesinden ticari olumda hasat edilen 0900 Ziraat kiraz çeşidinde hasat sonrasında kitosan (%0.5 ve %1.0) ve Aloe vera (%5 ve %10) uygulamalarının etkileri incelenmiştir. Uygulama yapılan meyveler 35 gün süreyle soğukta (1 °C, %90 oransal nem) muhafaza edilmiştir. Depolama süresince 7 gün aralıklarla depodan çıkartılan örneklerde fiziksel ve biyokimyasal özellikler (ağırlık kaybı, meyve eti sertliği, meyve kabuk rengi, toplam fenolik madde miktarı, toplam antioksidan aktivite ve kiraz sapı toplam klorofil miktarı) analiz edilmiştir. Muhafaza süresince hasat sonrası uygulamaların kontrole kıyasla meyve kalite özelliklerini korumada etkili olduğu belirlenmiştir. Bu etkinin Aloe vera uygulamasının %10, Kitosan uygulamasının %1.0’lık dozlarında daha belirgin olduğu tespit edilmiştir. Bu uygulamalar ağırlık kaybı, meyve eti sertliği ve saplarda klorofil kaybındaki azalışı geciktirmede etkili bulunmuştur. Sonuç olarak %1 kitosan ve %10 Aloe vera uygulamalarının 0900 Ziraat kiraz çeşidinin soğukta muhafazasında kalite özelliklerini korumada etkili uygulamalar olduğu sonucuna varılmıştır.

Effect of Postharvest Chitosan and Aloe vera Applications on the Quality of Sweet Cherry during Cold Storage

Sweet cherry experience losses in firmness and colors along with pedicel browning and decay, restricting the storage life. Postharvest applications are essential to maintaining fruit quality and extend the storage duration of sweet cherries. Restricting the respiration during cold storage is an effective strategy to extend fruit quality. In this study, effects of postharvest chitosan (0.5% and 1.0%) and Aloe vera (5% and 10%) treatments on the quality maintenance of sweet cherry cv. 0900 Ziraat harvested from Akşehir (Konya) at commercial maturity stage were investigated. The treated fruits were stored at cold storage (1 °C, 90% relative humidity) for 35 d. During the storage, physical and biochemical (weight loss, firmness, skin color, total phenols, total antioxidant activity and chlorophyll content of pedicel) analyses of the fruits were performed with 7 d intervals. Postharvest treatments were found effective to extend the quality of cherry fruits during the cold in comparison to control fruits. Among the doses applied, 10% Aloe vera and 1.0% chitosan were more effective than the others. These treatments markedly delayed the weight loss, firmness and chlorophyll concentration. Finally, 10% Aloe vera, and 1.0% chitosan treatments were found effective to maintain quality features of the sweet cherry cv. 0900 Ziraat during the storage

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