Modifiye atmosferde muhafazanın ‘Canernar-1' narlarının antioksidan aktivitesi ve derim sonrası fizyolojisi üzerine etkileri

Bu çalışmada, modifiye atmosferde muhafazanın ‘Canernar-1’ narlarının antioksidan aktivitesi ve derim sonrası fizyolojisi üzerine etkileri araştırılmıştır. Bu amaçla, optimal derim zamanında derilen narlar kontrol meyveleri dışında iki farklı modifiye atmosfer ortamında (MAP1 ve MAP2), 6 °C sıcaklık ve % 90-92 oransal nemde 210 gün süreyle depolanmışlardır. Değişik muhafaza ortamlarından 30 gün aralıklarla alınan meyve örneklerinde, muhafaza periyodu süresince çeşitli fiziksel ve kimyasal analizler (modifiye atmosfer torbaları içerisindeki CO2 ve O2 miktarlarındaki değişimler, ağırlık kaybı, meyve kabuk rengi, titre edilebilir asit, suda çözünebilir kuru madde, toplam antosiyanin, toplam fenolik bileşikler, antioksidan aktivitesi, dış görünüş, çürük meyve miktarı ve çürük meyve indeksi) yapılarak meyvelerin depolama süresince kalitelerinde meydana gelen değişmeler belirlenmiştir. Modifiye atmosferde depolama narların ağırlık kayıplarını, kalite kayıplarını (dış görünüş) ve çürük meyve miktarını azaltmada, titre edilebilir asit miktarı, meyve kabuk rengi ve antioksidan aktivitesinin korunmasında oldukça etkili olmuştur. MA ortamında depolanan narlar 6 °C sıcaklık ve % 90-92 oransal nemde 210 gün süreyle kalitelerinden fazla bir şey kaybetmeden başarıyla depolanmışlardır.

The effects of modified atmosphere packaging on the antioxidant activity and postharvest physiology of ‘Canernar-1’ pomegranates

In this research, the effects of different modified atmosphere packaging on the antioxidant activity and postharvest physiology of ‘Canernar-1’ pomegranates were investigated. Pomegranates were harvested at the commercial harvest stage and packed in two different types of modified atmosphere packaging (MAP1 and MAP2). Packed and unpacked (control) fruits were stored at 6oC and 90-95% relative humidity for 210 days. During the storage period, various physical and chemical analyses (CO2 and O2 levels inside the MA bags, weight loss, skin color, total titratable acidity, total soluble solids, total anthocyanins, total phenolics, antioxidant activity, visual appearance, decayed fruit number and decayed fruit index) were performed on the fruit samples taken from the cold storage rooms at 30 days intervals. Storing of pomegranates in both MAP’s created a favorable environment around the fruits and weight loss was lower at these treatments. Besides weight losses and decayed fruit number both modified atmosphere packages were found quite effective in maintaining the amount of titratable acidity, skin color and antioxidant activity of the pomegranates. Under these conditions, Canernar-1 types of pomegranates can be store up to 210 days with minimal quality losses.

Kaynakça

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