The aim of the study was to determine the effect of Aloe vera (AV) and modified atmosphere packaging (MAP) applications on post-harvest fruit quality in ‘Ankara’ pear cultivar. Fruit treated with ...MAP, AV (33%) and MAP + AV were stored for 120 days at 1 °C and 90 ± 5% relative humidity. The quality analyses and measurements such as weight loss, decay rate, fruit firmness, soluble solids content (SSC), titratable acidity (TA), pH, total phenolic compounds, antioxidant capacity, organic acids and specific phenolic compounds were made on the 30th, 60th, 90th and 120th days of the cold storage. The losses in fruit firmness were less with MAP and MAP + AV applications, but these applications were found to significantly reduce weight loss and decay rate. It was determined that fruit color characteristics were maintained in all applications. With MAP and AV applications, the increase in SSC and the decrease in TA ratios were lower in fruit, so fruit ripening was delayed. However, the changes in the individual phenolics and organic acids content during cold storage were lower in fruit treated with MAP and AV. As a result of the study, it was concluded that MAP and AV applications on pear can be effectively used in delaying maturity and maintaining quality during cold storage.
The storage and shelf life of the fig, which has a sensitive fruit structure, is short, and this results in too much economic losses. In the study carried out to contribute to the solution of this ...problem, the effect of postharvest melatonin application at different doses (0, 0.10, 0.25, 0.50 and 1.00 mM) on fruit quality characteristics and biochemical content during cold storage was determined. The weight loss and decay rates that increased with the prolongation of the cold storage period were lower in melatonin-treated fig fruit. Melatonin application delayed fruit softening. The soluble solids content (SSC) ratio in melatonin treated-fruit was lower, and melatonin was effective on titratable acidity (TA), but there were inconsistencies in the effect. It can be said that the effect of melatonin application on the decreasing phenolic compounds during cold storage is limited. The significant differences occurred between applications in terms of antioxidant capacity at the end of the cold storage. The highest values were recorded with the control application and the lowest values with the application of 0.10 mM melatonin. The decrease in the amount of individual phenolic compounds both during and at the end of cold storage was lower with melatonin applications. Melatonin application had an effect on flavonoid compounds during cold storage, but this effect varied depending on melatonin concentration and compound. Melatonin application was effective in the changes in the amount of organic acids during cold storage, and this effect varied depending on the species of organic acid and cold storage time. In the study, it was concluded that melatonin application can be used to maintain postharvest quality in fig.
Abstract Pear ( P. communis L.), which is a climacteric fruit species, has a very short storage and shelf life, and significant losses occur due to high metabolic activity and the fruit's respiration ...rate after harvest. Therefore, preventing or reducing post‐harvest quality losses in pear is one of the most basic problems awaiting solution. In this study, we planned for this purpose; the fruits of the Ankara pear cultivar treated with modified atmosphere packaging ( MAP), putrescine (1 mM), and MAP + putrescine were stored for 120 days at 1°C and 90 ± 5% relative humidity. The quality analyses and measurements, such as weight loss, decay rate, fruit firmness, soluble solids content (SSC), titratable acidity (TA), total phenolic compounds, antioxidant capacity, organic acids, and specific phenolic compounds, were performed on the 30th, 60th, 90th, and 120th days. Weight loss and decay ratios were lower for putrescine and putrescine + MAP‐applied fruit. With these applications, the softening of the fruit was slowed down, and the increasing SSC in the fruit and the decreasing TA rates were lower, and thus the ripening of the fruit was delayed. Changes in individual phenolic content and organic acids were lower in MAP and putrescine‐applied fruit. The study revealed that MAP and putrescine applications in pear can be used effectively to maintain fruit quality after harvest.
Sweet cherry, which affects consumers’ preferences with its aroma, taste and sensory properties, is a significant fruit species for human health with its bioactive compounds such as organic acids, ...vitamins and anthocyanins. However, its post-harvest shelf life is very short due to its sensitive fruit structure. Thus, the significant economic losses occur. In the study, effects of pre-harvest Aminoethoxyvinylglycine (AVG), Salicylic acid (SA) and plant growth promoting rhizobacteria (PGPR) applications on fruit quality characteristics and biochemical content in sweet cherry were determined. SA and PGPR treatments increased fruit size, but AVG decreased (If the fruit weight is 4.51 in the control application, 4.49 in the SA application and 4.10 in the PGPR, how can it be said that SA and PGPR increase the fruit weight). The fruits treated with SA, AVG and PGPR had higher fruit firmness values than the control’-fruits. Salisylic acid treatmens did not affect the rate of soluble solids content(SSC) in fruit, SSC rate was higher in PGPR treated-fruit, but AVG decreased the SSC. Titratable acidity (TA) was lower in PGPR treated-fruit, but was higher in the AVG and SA treated-fruit. Fruits treated with the SA and AVG had higher fruit color values than control fruits, while the lowest color values was obtained with PGPR treatment. In general; PGPR, SA and AVG were effective in the concentration of organic acids, but their effects varied depending on the organic acid compounds. As a result, AVG and SA delayed fruit ripening and fruit softening while PGPR, AVG and SA improved fruit quality (It is not clear how this idea was reached). These applications can be considered as a promising method for improving fruit quality at harvest and maintaining post-harvest fruit quality of sweet cherry.
In peach, which is a climacteric fruit species, the fruit deteriorates rapidly at post harvest with the increase in ethylene production and respiration rate during ripening, and significant changes ...occur in quality properties and antioxidant activity. In the study, the effect of melatonin applications at different doses (0, 0.10, 0.25, 0.50 and 1.00 mM) at postharvest on fruit quality characteristics and biochemical content during cold storage was determined. The increased weight loss and decay rate with the prolongation of the cold storage period were lower in melatonin-treated fruit and varied depending on the application concentration. Melatonin application was effective in maintaining fruit flesh firmness, but application concentration had no effect. An increase in soluble solids content (SSC) ratio and a decrease in acidity occurred during storage, and changes in SSC and titratable acidity ratios were lower with melatonin application. In general, melatonin application was effective in maintaining the concentration of organic acids, but this effect varied depending on the concentration and compound. As a result, it was concluded that 0.25 mM melatonin application can be used to maintain the postharvest fruit quality of peach.
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.
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.
