Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Aglar, Erdal(5)
- Gundogdu, Muttalip(4)
- Sen, Fatih(2)
- Alan, Davut(1)
- Calicioglu, Mehmet(1)
- Dikici, Abdullah(1)
- Dogan, Hande(1)
- Ejaz, Shaghef(1)
- Esra Yüksel(1)
- Gündoğdu, Özlem(1)
- Kaygısız, Tansel(1)
- Koluman, Ahmet(1)
- Kılıncer, Mustafa(1)
- Orman, Erdal(1)
- Ozturk, Burhan(1)
- Sakaldaş, Mustafa(1)
- Sezgin, Nevzat(1)
- Sumbul, Ahmet(1)
- Tekin, Onur(1)
- Çolak, Ayşen Melda(1)
- Şen, Fatih(1)
Yayınlar
- MakaleAçık Erişim2026Scopus SJRQ1Regulation of Quality and Phenolic Metabolism in Apricot Fruit by Postharvest Salicylic Acid and Putrescine Applications
Sakaldaş, Mustafa; Şen, Fatih; Gundogdu, Muttalip; Aglar, Erdal
Apricots are a highly sensitive product that suffers rapid quality losses due to physiological and biochemical processes such as increased respiration, ethylene production, cell wall breakdown, and changes in phenolic compounds that occur in the post-harvest period, and this significantly shortens their shelf life. This study evaluated the effects of salicylic acid (SA) and putrescine (Put) applications on post-harvest quality characteristics, organic acid metabolism, and phenolic compound stability in apricot (Prunus armeniaca L.) fruits. Fruits harvested at commercial maturity were treated with four different applications: control, SA (1 mM), Put (1 mM), and a combination of SA and Put. In this study, the physiological quality parameters such as weight loss, decay rate, soluble solids content (SSC), titratable acidity (TA), pH, and respiration rate were measured, and biochemical analyses of organic acids and individual phenolic compounds were performed. With increasing storage time, weight loss, decay rate, and pH values increased in all treatment groups, whereas significant decreases occurred in organic acids, ascorbic acid, and total phenolic compounds. However, it was determined that SA and Put applications significantly slowed down these negative changes. In particular, the SA + Put combination improved storage stability by providing the lowest weight loss and decay rate thanks to the preservation of cell membrane stability and the limitation of transpiration. Phenolic compound analyses showed that phenolic degradation is the natural process during storage, but SA and Put applications significantly slowed this process. In particular, it was determined that the combination application contributed to the preservation of antioxidant phenols by supporting phenylpropanoid metabolism, and that the highest level of phenolic stability was achieved in this group. PCA results revealed that quality degradation parameters were positively correlated with respiration rate and weight loss, whereas phenolic compounds, organic acids, and ascorbic acid showed strong positive correlations with quality preservation. Correlation analysis also supported these findings, confirming that antioxidant compounds play a decisive role in storage performance. In conclusion, it was determined that the combined application of SA and Put reduces oxidative stress, regulates metabolic activity, stabilizes phenolic metabolism, and significantly delays post-harvest quality losses in apricot fruit. This approach was found to offer an effective, feasible, and sustainable post-harvest strategy for extending shelf life and preserving nutritional quality components.
- MakaleYalnız künye2026Scopus SJRQ1Enhancement of chlorogenic acid application on the quality, biochemical properties, and cold storage stability of sweet cherry fruit
Gundogdu, Muttalip; Sen, Fatih; Aglar, Erdal; Kılıncer, Mustafa
This study investigated the effects of chlorogenic acid (ChlA) applications on postharvest quality characteristics and biochemical components of sweet cherry (Prunus avium L. cv. ‘0900 Ziraat’) fruit. Fruits were treated with control, 0.5, 1.0, and 1.5 mM ChlA and stored at 4 ± 0.5 °C for 21 days. Storage significantly increased weight loss and decay rate while reducing respiration rate and biochemical quality. At the end of storage, the 1.5 mM ChlA treatment reduced weight loss from 8.32% in the control to 5.20% and decreased decay rate from 9.16% to 4.50%. ChlA applications also slowed changes in soluble solids content (SSC), titratable acidity (TA), and pH, contributing to a more stable chemical composition. The highest vitamin C content at the end of storage was recorded in the 1.5 mM ChlA treatment (11.71 mg 100 g⁻¹), compared with 9.97 mg 100 g⁻¹ in the control. Similarly, chlorogenic acid significantly delayed losses of organic acids and phenolic compounds; for example, quercetin content was maintained at 6.80 mg 100 g⁻¹ in 1.5 mM ChlA-treated fruit compared with 3.78 mg 100 g⁻¹ in the control after 21 days of storage. Principal component analysis (PCA) and correlation analysis revealed strong relationships among quality attributes and biochemical compounds and demonstrated the positive role of ChlA in preserving overall fruit quality. Overall, chlorogenic acid, particularly at 1.5 mM, effectively reduced postharvest quality losses and enhanced biochemical stability during cold storage.
- MakaleAçık Erişim2026Scopus SJRQ1Impact of Postharvest Oxalic Acid Treatments on Quality Properties and Biochemical Composition of Medlar (Mespilus germanica L.) Fruit
Çolak, Ayşen Melda; Gündoğdu, Özlem; Aglar, Erdal; Sezgin, Nevzat; Orman, Erdal; Gundogdu, Muttalip
This study was conducted to investigate the effects of oxalic acid (OA) applications at different concentrations on the quality traits and biochemical components of medlar (Mespilus germanica L.) fruit. Fruits harvested in Bolu province in 2024 were subjected to control (0) and 0.5, 1.0, and 1.5 mM OA applications and stored at 4°C and 90% ± 5% relative humidity for 45 days. Samples were taken from the fruits at certain intervals (0, 15, 30, and 45 days) and analyzed. Specifically, 1.0 and 1.5 mM OA applications significantly reduced fruit weight loss and decay rates. OA also inhibited increases in fruit respiration rate and pH and slowed the decline in total acidity, soluble solids content (SSC), vitamin C, phenolic compounds, and organic acids. Malic, citric, succinic, tartaric, and fumaric acids, vitamin C, and important phenolic compounds (chlorogenic acid, gallic acid, quercetin, catechin) were protected by OA applications, and this protection was most pronounced at 1.5 mM OA dose. The correlation analyses revealed significant relationships between quality parameters and biochemical contents. The weight loss and decay rate were negatively correlated with bioactive compounds such as gallic acid and ascorbic acid, indicating that quality deterioration progressed in parallel with the decrease in nutrient content. A strong positive correlation was found between titratable acidity and malic and citric acids. In principal component analysis (PCA), malic and citric acids were prominent in the early storage period, while weight loss, decay, and increased respiration became dominant in the late storage period. Phenolic compounds decreased significantly with storage time, and antioxidant capacity decreased. Heat map analysis visually supported the increase in spoilage parameters with the decrease in ascorbic acid and phenolic compounds. OA applications maintained the quality of medlar fruit and increased biochemical stability, extending postharvest life. 1.5 mM OA, in particular, stands out as an effective postharvest preservation method. These results demonstrate that OA offers significant potential for increasing the commercial value of perishable fruits like medlar and for developing preservation technologies.
AtıfScopus1OpenAlex1
İncele - MakaleAçık Erişim2025Scopus SJRQ1Pomological and Biochemical Properties of Blackberry (Rubus fruticocus) Genotypes
Dogan, Hande; Aglar, Erdal; Ozturk, Burhan; Tekin, Onur; Alan, Davut; Sumbul, Ahmet
The aim of this study was to examine the genotypes of wild blackberries growing naturally in Tunceli province in terms of fruit characteristics and to determine the ones with superior characteristics. Nine different genotypes were determined by population screening and 100 fruits were collected from each genotype. The physical properties such as fruit weight, length, width, as well as color, chemical content, and antioxidant properties were examined. Statistically significant differences were found among the genotypes; fruit weight, length, and width varied between 0.71 and 1.19 g, 10.08 and 12.63 mm, and 12.25 and 14.33 mm, respectively. The G9 genotype had the largest fruits, and the G6 genotype had the smallest fruits. In fruit color analyses, significant differences were observed among the genotypes, and the G2 genotype stood out with the highest L* value (20.05), but G9 had the lowest a* value (0.92). Total soluble solids (TSS) content varied between 11.95% in G2 and 21.10% in G7. Vitamin C content was highest in the G6 genotype (54.46 mg 100 g−1), while G9 had the lowest vitamin C content (22.66 mg 100 g−1). Significant differences were also observed among the genotypes in terms of phenolic content, flavonoids, anthocyanins, and antioxidant activity. As a result, in this study, significant differences in organic acid contents were determined among wild blackberry genotypes in Tunceli province. The G1 genotype was the richest in malic acid, while the G6 was the genotype with the highest ascorbic acid level. Various differences were also found among the genotypes in terms of oxalic acid, citric acid, and other organic acid contents. These findings may constitute an important resource in determining the commercial production and potential health benefits of wild blackberries. In the selection of blackberry genotypes, consideration of these organic acid contents is important, especially in terms of taste and nutritional value.
AtıfScopus3OpenAlex1İncele - MakaleYayıncıda açık erişim2025Scopus SJRQ1Effect of postharvest melatonin and salicylic acid applications on quality characteristics and primary and secondary metabolite physiology of tomato fruits
Kaygısız, Tansel; Sen, Fatih; Gundogdu, Muttalip; Ejaz, Shaghef; Aglar, Erdal
Background: This study aims to investigate the effects of postharvest melatonin (ML) and salicylic acid (SA) applications on fruit quality and biochemical properties in tomatoes. The potential synergistic effects were investigated by applying these compounds to the ‘Depar’ tomato variety grown in Bolu in the 2024 production season. The tomato fruit that were mature and free from physical damage were selected and sterilized according to predetermined criteria. Afterwards, ML and SA solutions (1 mM) were sprayed on each fruit and then the fruit were stored at 5 ± 0.5 °C and 90 ± 5% relative humidity. Pomological and biochemical measurements and analyses were carried out on fruit stored for 24 days in three different periods (8th, 16th and 24th days). Results: With the extension of storage period, the increase in spoilage and ripening symptoms such as weight loss (8.53%), pH increase (5.01) and soluble solids content (SSC) accumulation (4.95%) was observed in tomatoes. In addition, the significant decreases occurred in malic acid, citric acid, tartaric acid, oxalic acid, vitamin C and phenolic compounds. However, SA and ML applications slowed down these negative changes, with the best results generally obtained in the SA + ML combination. This combination significantly limited the decreases in weight loss and chemical contents, delayed the ripening of tomatoes and maintained their nutritional value. Especially in early and middle storage periods (8th and 16th days of the cold storage), SA + ML applications gave the most effective results. However, some protective effects were reduced by the 24th day the cold storage. Conclusion: SA and ML applications are recommended as an effective biopreservation strategy to extend the shelf life of tomatoes, prevent commercial value loss and maintain quality. This study demonstrates the potential of using bioactive compounds to preserve the quality and nutritional values of tomatoes after harvest.
AtıfScopus10OpenAlex12İncele - Yüksek Lisans TeziAçık Erişim2018Tunceli ilinde yetişen sumak bitkisinin fitokimyasal bileşenlerinin incelenmesi
Esra Yüksel
Sumak Anacardieceae ailesine ait bir bitkidir. Bu çalışmada Tunceli'de doğal olarak yetişen sumak bitkisi 5 farklı ilçeden toplandı, yıkandıktan ve oda sıcaklığında kurutulduktan sonra analize kadar buzdolabında saklandı. Sumak örneklerinde pH, renk, kül miktarları, toplam fenolik madde içeriği, DPPH serbest radikali giderme kapasitesi, metal şelatlama kapasitesi, CUPRAC, indirgeme kuvveti, mineral madde içeriği, organik asitlerden; tartarik asit, malik asit ve sitrik asit, fenolik bileşiklerden; gallik asit, vanilik asit, kafeik asit, rutin, resveratrol, (-)- epikateşin ve (+)- kateşin hidrat içeriği belirlendi. Yapılan çalışmada toplam fenolik madde (TFM) miktarı 1929±63 mg GAE kg-1-231±10 mg GAE kg-1 aralığında bulundu. Bütün sumak örneklerinde TFM miktarı en yüksek asitlendirilmiş metanol ekstraktında, DPPH serbest radikali giderme kapasitesi ise asitlendirilmiş asetonitril ekstraktında olduğu görüldü. S5 nolu örneğin ise bütün ekstraktlarının metal şelatlama kapasitesi diğer örneklerden yüksek olduğu fakat EDTA'nın metal şelatlama kapasitesinden düşük olduğu belirlendi. CUPRAC'ın ise en yüksek 118.0±3.0 mg KAE kg-1 ile S5 nolu örneğin asitlendirilmiş metanol ekstraktında, en düşük 10.2±0.6 mg KAE kg-1 ile yine S5 nolu örneğin asitlendirilmiş asetonitril ekstratında olduğu tespit edildi. Bütün örneklerin indirgeme kuvvetleri ise sentetik antioksidanların indirgeme kuvvetlerinden düşük olduğu, ayrıca örneklerin mineral madde bakımından da zengin oldukları, baskın olan organik asidin malik asit, fenolik bileşiğin ise gallik asit olduğu tespit edildi.
- MakaleAçık Erişim2015Scopus SJRQ1Comparison of effects of mild heat combined with lactic acid on Shiga toxin producing Escherichia coli O157:H7, O103, O111, O145 and O26 inoculated to spinach and soybean sprout
Dikici, Abdullah; Koluman, Ahmet; Calicioglu, Mehmet
The aim of the present study was to investigate the effect of lactic acid against Shiga toxin producing Escherichia coli (O157:1-17 and non-O157 serogroups including O103, O111, O145 and O26) at different conditions. Soybean sprouts and spinach leaves inoculated with each serogroup of E. coli (similar to 7.00 + 1.00 log(10) cfu/g) were treated with the lactic acid solutions at different concentrations (0% (control), 1.5%, 2.0%, or 2.5%) and at different temperatures (20, 40, or 50 degrees C) for 3 min. Results indicated that regardless of the treatment temperature, no significant reduction in the numbers of any serogroup occurred in the control group (0%) (p > 0.05). However, lactic acid at concentration of 1.5%, 2% and 2.5% was found to be effective against all organisms tested. There was no significant difference (p > 0.05) between E. coli O157:H7 and non-O157 STEC serogroups at any treatment group. The highest reductions (ca. 400 log(10) cfu/g) of all serotypes in both produces were observed after immersing into 2.5% lactic acid at 50 degrees C. The results of this study showed that decontamination of fresh produces such as spinach and soybean sprout with lactic acid solutions prepared at mild temperatures (40 degrees C and 50 degrees C) might be an effective safety measure in preventing public health risks associated with these products contaminated with STEC. (C) 2014 Elsevier Ltd. All rights reserved.
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