The Effect of Post-Harvest Melatonin Application on Fruit Quality at Cold Storage in Sweet Cherry (Prunus avium L.)

Öz

This study aimed to contribute to the solution of the short storage and shelf life of sweet cherry (Prunus avium L.), which has a delicate fruit structure. The effect of post-harvest melatonin application at different doses [0.00 (control), 0.01, 0.10, and 1.00 mM] on fruit quality characteristics and biochemical content during storage was determined. Fruits harvested from trees of the Lapins cherry variety grafted onto MaxMa 60 rootstock, established in an orchard in 2005, were used as the plant material. The research findings revealed that the weight loss, which increased with storage time, was lower in melatonin-treated fruits, and differences occurred depending on the application dose. Melatonin application was effective in preserving fruit firmness during storage. Fruits treated with 0.01 mM melatonin exhibited higher flesh firmness during storage. Significant changes in color values occurred during storage, and it was determined that melatonin application had an effect on color changes, which varied depending on the dose. The soluble solid content values in cherry fruits decreased linearly throughout the storage period, but the decrease was lower in melatonin-treated fruits. The titratable acidity values decreased in all applications during storage, with the lowest values obtained from the control group. Melatonin application was effective in maintaining the concentration of organic acids during storage, but it had both positive and negative effects depending on the concentration. In conclusion, this study demonstrated that melatonin can be used to preserve fruit firmness and reduce weight loss during storage.

Anahtar Kelimeler

• Organik acid
• weight loss
• fruit firmness
• fruit color

Kiraz (Prunus avium L.)’da Hasat Sonrası Melatonin Uygulamasının Depolamada Meyve Kalitesi Üzerine Etkisi

Öz

Hassas bir meyve yapısına sahip olan kiraz (Prunus avium L.)’ın depolama ve raf ömrü süresi kısadır. Bu problemin çözümüne katkı sunmak için yapılmış bu çalışmada, kirazda hasat sonrası farklı dozlarda melatonin uygulamasının 0.00 (kontrol), 0.01, 0.10 ve 1.00 mM depolama süresince meyve kalite özellikleri ve biyokimyasal içerik üzerine etkisi belirlenmiştir. Bitkisel materyal olarak 2005 yılında MaxMa 60 anacı üzerine aşılı Lapins kiraz çeşidine ait ağaçlar ile kurulmuş bahçeden hasat edilen meyveler kullanılmıştır. Araştırma sonucunda, depolama süresi ile birlikte artış gösteren ağırlık kaybı melatonin uygulanmış meyvelerde daha düşük olduğu ve uygulama dozuna bağlı olarak farklılıkların oluştuğu belirlenmiştir. Melatonin uygulaması depolamada meyve eti sertliğinin korunmasında etkili olmuştur. Depolama süresince 0.01 mM melatonin uygulanmış meyvelerde et sertliği daha yüksek bulunmuştur. Depolama süresince renk değerlerinde önemli değişiklikler meydana geldiği, renk değişimi üzerine melatonin uygulamasının etkili olduğu ve bu etkinin doza bağlı olarak değişiklik gösterdiği saptanmıştır. Kiraz meyvelerinde suda çözünür kuru madde miktarı değerleri muhafaza süresince doğrusal olarak azalmıştır. Melatonin ile muamele edilmiş meyvelerde azalma daha düşük olmuştur. Titre edilebilir asitlik değerleri muhafaza süresince tüm uygulamalarda azalmış ve en düşük değerler kontrol uygulamasından elde edilmiştir. Depolama süresince tüm organik asitlerde konsantrasyonun muhafaza edilmesinde melatonin uygulamasının etkili olduğu, ancak konsantrasyona bağlı olarak olumlu ve olumsuz etkilerinin olduğu görülmüştür. Sonuç olarak çalışmada depolamada meyve eti sertliğin korunmasında ve ağırlık kaybının azaltılmasında melatoninin kullanılabileceği ortaya konulmuştur.

Anahtar Kelimeler

• Organik asit
• ağırlık kaybı
• meyve eti sertliği
• meyve rengi

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