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Öğe EFFECTS OF 1-METHYLCYCLOPROPENE AND MODIFIED ATMOSPHERE PACKING ON POSTHARVEST LIFE AND QUALITY IN TOMATOES(WILEY-HINDAWI, 2011) Sabır, Ferhan Küçükbasmacı; Ağar, İ. TayfunThe effects of 1-methylcyclopropene (1-MCP), modified atmosphere packaging (Xtend, StePac L.A. Ltd., Tefen, Israel) and their combination were investigated on storage and quality maintenance of tomatoes cv. "Perla" harvested at two maturity stages. 1-MCP treatment was performed in 1,000 nL/L doses for 24 h while untreated fruits were considered as control. Fruits were stored at 12C with 90% relative humidity for 21 days. Weight loss, skin color, elasticity, lycopene, ascorbic acid, soluble solid content (SSC), titratable acidity (TA) and SSC/TA were evaluated with the intervals of 7 days. MAP with and without 1-MCP reduced weight loss and maintained to elasticity compared with control and 1-MCP alone. Nevertheless, 1-MCP or its combination with MAP significantly delayed changes in parameters related to fruit ripening, such as skin color, lycopene, TA and SSC/TA increase in both ripening stages. Overall results indicated that the combination of 1,000 nL/L 1-MCP and modified atmosphere package was the most effective treatment in both ripening stages. PRACTICAL APPLICATIONS Tomato is a climacteric fruit and its ripening depends on ethylene production physiology. 1-Methylcyclopropene (1-MCP) prevents ethylene action by blocking ethylene receptors and extends the storage life of tomatoes. Modified atmosphere packaging (MAP) of fresh fruits and vegetables refers to the still evolving technique of matching the respiration of the product with the O-2 and CO2 permeability of packages in order to modify the oxygen and carbon dioxide concentrations of the atmosphere to desired levels within the package. Recent studies revealed that combined applications of 1-MCP and MAP have significant effects on maintaining storage quality of banana, litchi and plums. This study was conducted on the investigation of the effects of 1-MCP and MAP combination on storage duration and quality of tomatoes harvested at different maturity stages.Öğe EFFECTS OF 1-METHYLCYCLOPROPENE TREATMENT ON POSTHARVEST LIFE AND QUALITY IN FOUR TOMATOES CULTIVARS(PAKISTAN AGRICULTURAL SCIENTISTS FORUM, 2012) Sabır, F. K.; Kuşvuran, Şebnem; Daşgan, Hayriye Yıldız; Ağar, İ. TayfunThe effects of 1-methylcyclopropene (1-MCP) on postharvest quality in four tomato cultivars ('601', '602', '603' and 'Target') were determined during storage. Tomatoes were harvested at pink stages and divided into two lots per each cultivar. One of the lots was exposed to 1000nl l(-1) 1-MCP doses for 24 h at 20 degrees C while untreated fruits were considered as control. Thereafter, fruits were stored at 10 degrees C and 90% RH for 21 days. During storage weight loss, elasticity, skin color, soluble solid content (SSC), titratable acidity (TA), ripening index (SSC/TA), lycopene and ascorbic acid were measured. The results indicated that in all of the four cultivars, 1-MCP treatment significantly delayed the development of skin color, inhibited the increase of lycopene synthesis and ripening index (SSC/TA) corresponds to tomato fruit ripening. 1-MCP treatment provided better results across all the tested cultivars. Especially, Target cultivar was more responsive to 1-MCP in terms of quality maintenance and storage life extension.Öğe Effects of Modified Atmosphere Packaging on Postharvest Quality and Storage of Mature Green and Pink Tomatoes(Int Soc Horticultural Science, 2010) Sabır, Ferhan Küçükbasmacı; Ağar, İ. TayfunThe effects of modified atmosphere packaging (MAP) on storage and postharvest quality of F-1 hybrid tomatoes (Lycopersicon esculentum Mill. 'Zorro') were investigated. Tomatoes were harvested at mature green and pink stages and packed with Xtend (R) bags. Air stored fruits were considered as control. All samples were stored at 12 degrees C with 90% RH for 35 days. Weight loss, elasticity, skin color, ethylene production, lycopene, polygalactronase (PG) activity and decay parameters were investigated with intervals of 7 days. At the end of the storage, MAP of either mature green or pink fruits reduced the weight loss and decay. Among mature green tomatoes stored in MAP, the amount of decayed fruit was 5.88%, while this level for control fruits was 19.61%. MAP also delayed the increase of ethylene emission rate (detected by GC) and polygalactronase activity and the higher elasticity obtained from MAP compared to control. At the end of the storage, elasticity values were significantly higher in fruits of both maturity stages stored in MAPs (69.50 and 56.13 shore for mature green and pink fruits, respectively) than those of the control groups (55.73 and 46.53 shore for mature green and pink stages, respectively). Furthermore MAP alleviated the increment of PG activities in fruits of both stages. Mature green fruit had lower weight loss, decay, lycopene accumulation, ethylene production values, whereas they had higher hue angle and elasticity values than pink fruits. The general qualities of MAP fruits were better than those of air stored fruits. Overall findings indicate that MAP was able to store mature green for 35 days without significant decreases in quality characteristics.Öğe Influence of different concentrations of 1-methylcyclopropene on the quality of tomato harvested at different maturity stages(WILEY-BLACKWELL, 2011) Sabır, Ferhan Küçükbasmacı; Ağar, İ. TayfunBACKGROUND: A wide range of 1-methylcyclopropene (1-MCP) concentrations as well as various treatment durations have been studied in tomatoes by different researchers. However, little is known about interaction of 1-MCP doses and maturity stages of tomatoes. Therefore the effects of different concentrations of 1-MCP on storage and postharvest quality of 'Zorro' tomatoes harvested at mature green or pink maturity stages were investigated in a 2-year trial study. RESULTS: Higher concentrations of 1-MCP delayed and/or inhibited all parameters related to fruit ripening, such as lycopene, chlorophyll, surface color, polygalacturonase (PG) activity and soluble solids content/titratable acidity (SSC/TA), and these effects were greater in tomatoes harvested at the mature green stages. Lower concentrations of 1-MCP slightly reduced the loss in general quality features compared with untreated tomatoes. CONCLUSION: The results suggest that 1-MCP, especially at higher doses, is effective for delaying ripening of mature green tomatoes. Mature green fruits treated with 1000 nL L(-1) 1-MCP were stored for 35 days without significant decreases in quality characteristics such as elasticity, surface color and SSC/TA with certain physiological processes (ethylene production, PG activity, lycopene synthesis). (C) 2011 Society of Chemical IndustryÖğe Sıcak Su Uygulaması ve Modifiye Atmosferde Paketlemenin Mirella F1 Domates Çeşidinin Muhafaza Süresi ve Kalitesi Üzerine Etkileri(2010) Sabır, Ferhan K.; Şenel, B. Selahattin; Ağar, İ. TayfunBu çalışmada, pembe olum aşamasında derimi yapılan Mirella F1 domateslerinde sıcak su, modifiye atmosfer paketleme (MAP) ve bunların kombinasyonlarının muhafaza süresine meyve kalitesi ve muhafaza üzerine etkileri araştırılmıştır. Bu amaçla derimi yapılan domatesler 4 gruba ayrılmış, ilk 2 grup domatesler 54 C sıcaklıktaki suda 5 dakika süreyle bekletilmiş ve daha sonra oda koşullarında kurutulmuştur. Sıcak su uygulanmış domateslerin birinci grubu modifiye atmosfer torbalarda, ikinci grubu ise plastik kasalara yerleştirilerek depolanmıştır. Üçüncü grup domatesler ise yaklaşık 4 kg’lık modifiye atmosfer torbalarında (MAP) ambalajlanmış, son grup domatesler ise kontrol grubunu oluşturmuş ve hiçbir uygulama yapılmadan depolanmıştır. Denemeye alınan domatesler 10 C ve %90 oransal nem içeren soğuk depolarda 20 gün süreyle muhafaza edilmiştir. 20 günlük muhafaza sonucunda ağırlık kaybının azaltılması, sertlik ve meyve renginin korunmasında modifiye atmosfer torbalar sıcak su ile birlikte kullanıldığında oldukça etkili sonuçlar vermiştir. Modifiye atmosfer torbalarda muhafaza edilen domateslerde solunum hızının diğer uygulamalara göre daha düşük olduğu ve bu domateslerin depolama süresince kalitesinin daha iyi korunduğu belirlenmiştir. Araştırma sonuçları genel olarak değerlendirildiğinde, sıcak su uygulaması ve modifiye atmosfer paketlerde depolama domateslerde kalitenin korunması ve muhafaza süresinin uzatılması için önerilebileceği sonucuna varılmıştır.
