Browsing by Author "Aglar, Erdal"

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Alterations in Quality Characteristics and Bioactive Compounds of Blackberry Fruits Subjected To Postharvest Salicylic Acid Treatment During Cold Storage
(Wiley, 2024) Sakaldas, Mustafa; Sen, Fatih; Gundogdu, Muttalip; Aglar, Erdal
Blackberry deteriorates rapidly after harvest due to its sensitive structure, limiting their storage time to about a week and resulting in significant economic losses. The study was conducted to determine the effects of salicylic acid applications on postharvest fruit quality in blackberries, the harvested fruit was immersed in salicylic acid solutions prepared at concentrations of 0.5, 1, and 1.5 mM for 15 min. Measurements and analyses such as weight loss, decay rate, soluble solids contents (SSC), pH, acidity, respiration rate, vitamin C, organic acids, and phenolic compounds were performed on fruits stored for 12 days with intervals of 4 days. Applying salicylic acid to fruits resulted in significantly less weight loss and decay rate. Salicylic acid application was effective in increasing SSC rate and decreasing titratable acidity with increasing storage time, and lower SSC and higher titratable acidity were measured with this application. Salicylic acid maintained organic acids and vitamin C postharvest. The decreases in individual phenolic compound levels occurred with extended storage time. Salicylic acid application generally was effective in maintaining concentrations of phenolic compounds during storage, and it was found to be effective on fruit quality, with effectiveness varying depending on application dosage. The study identified 1.5 mM as the most effective dosage of salicylic acid, which could be utilized to maintain postharvest quality and extend cold storage in blackberries. A study was conducted to assess the effects of salicylic acid on postharvest blackberry quality. Measurements such as weight loss, decay rate, soluble solids contents, pH, titratable acidity, respiration rate, vitamin C, organic acids, and phenolic compounds were taken over 12 days at 4-day intervals. Salicylic acid-treated fruits showed significantly less weight loss and decay. It also helped maintain organic acids, vitamin C, and phenolic compounds.image
Assessing the Impact of Krymsk 5, Piku 1 and Gisela 6 Rootstocks on Morphological and Quality Characteristics of Sweet Cherry
(BMC, 2025) Ozturk, Burhan; Belen, Serkan; Aglar, Erdal
BackgroundModern orchards are established with intensive planting systems that ensure early fruiting, high fruit yield and quality, and minimize labor costs, especially during harvesting. To meet the expectations of intensive planting systems, the most important factor is the selection of suitable rootstocks for climate and soil conditions. This study was conducted to determine the effects of combinations created with cold-resistant Krymsk 5, semi-dwarf rootstocks Gisela 6 and Piku 1, which are suitable for dense planting, and the sweet cherry varieties 0900 Ziraat and Regina, on their morphological, pomological, and biochemical properties.ResultsTree height, fruit weight, and total phenolic content in trees grafted onto Krymsk 5 rootstocks, and fruit firmness in trees grafted onto Gisela 6 rootstocks, were higher than in other rootstocks. The 0900 Ziraat cultivar showed significantly higher fruit weight, fruit width, and fruit length than the Regina cultivar. In contrast, the a*, b* values, vitamin C, anthocyanin, and antioxidant content in the Regina cultivar were significantly higher than those in the 0900 Ziraat. The rootstock x cultivar interactions had a significant effect on some properties.ConclusionIt was revealed that trees grafted onto Krymsk 5 rootstocks exhibited greater vegetative growth, and the fruit obtained from these trees was richer in terms of phytochemical content. Krymsk 5 is a potential rootstock for grafting with elite local cherry scions.
Biochemical Characterization of Mulberry (Morus Spp.) Genotypes From the Turkiye (Hizan, Bitlis): a Comprehensive Analysis of Fruit Properties and Bioactive Compounds
(Wiley, 2024) Uyak, Cuneyt; Aglar, Erdal; Ozturk, Burhan; Dogan, Adnan; Tekin, Onur
The present study was carried out to assess the fruit traits and phytochemical properties of 39 mulberry genotypes [Morus alba L. (16 white mulberry), Morus rubra L. (11 red mulberry), and Morus nigra L. (12 black mulberry)] selected in Bitlis province (Hizan) of Turkiye. Approximately, 1 kg fruit were hand-harvested from each genotype. The fruit size, fruit color, pH, titratable acidity, soluble solids content (SSC), vitamin C, total phenolics, total flavonoids, antioxidant activity, and individual phenolic compounds were determined. The fruit weight varied between 1.80 and 5.84 g in black mulberry, 1.22 and 4.18 g in red mulberry, and 1.29 and 3.10 g in white mulberry. In white mulberry, SSC was determined to be between 19.00% and 38.86%, and in black and red mulberry it was between 11.86% and 21.90% and 12.60% and 18.90%, respectively. The titratable acidity rate, which varied depending on the species, was lower in white mulberry, but the highest acidity rate was recorded in red mulberry. Vitamin C was determined as 33.13 mg 100 g(-1) in red mulberry, 24.10 mg 100 g(-1) in black mulberry, and 14.03 mg 100 g(-1) in white mulberry. Total phenolics in mulberries varied depending on the species, and the red mulberry fruit contained higher phenolic substances, followed by black and white mulberries. The total flavonoids varied between 0.27 and 7.83 g QE kg(-1), whereas the flavonoids varied depending on the species and genotype. The highest values in terms of bioactive compounds were recorded in fruits of the 13HZN23 and 37 genotypes. Black and red mulberry fruit were found to have higher levels of individual phenolic content than the white mulberrry fruit.
Changes in Fruit Quality Properties and Phytochemical Substances of Kiwifruit (Actinidia Deliciosa) Grown in Different Agro-Ecological Conditions During Cold Storage
(Bmc, 2024) Ozturk, Burhan; Korkmaz, Murat; Aglar, Erdal
Background The changes in the physical structures of the products are the first things that consumers pay attention to. Therefore, it is essential and significant importance to take measures to improve the storage conditions of products and to minimize quality losses. The main objective of the study was to evaluate the effects of agro-ecological conditions on bioactive compounds and fruit quality of kiwifruit during cold storage. The 'Hayward' kiwifruit cultivar grown in Ordu, Giresun, Samsun, Rize, and Yalova provinces of T & uuml;rkiye were kept at 0 +/- 0.5 degrees C and relative humidity of 90 +/- 5% for 150 d. Results The kiwifruit obtained from the provinces of Yalova, Ordu, and Giresun experienced the least weight loss during cold storage. Kiwifruit from Samsun and Yalova provinces had the lowest fruit firmness, while those from Giresun had the highest on 150th d. The changes were observed in the skin and flesh colors of the kiwifruit belonging to all cultivation areas. The amount of vitamin C increased throughout the study in all ecological conditions, but the Yalova province's kiwifruit was found to have the highest levels. Additionally, in all ecologies, kiwifruit showed an increase in antioxidant activity, total phenolics, and total flavonoids, all known to have beneficial effects on human health. The total antioxidant activity and total phenolics were highest in the kiwifruit of Yalova province, but the total flavonoids were found in the kiwifruit of Rize and Ordu provinces. Conclusion The study's results revealed that kiwifruit's bioactive compounds and quality parameters may vary depending on the cultivation area. Additionally, it can be stated that Yalova province kiwifruit experiences the least amount of postharvest quality losses.
Changes in Quality Traits and Phytochemical Components of Blueberry (Vaccinium Corymbosum Cv. Bluecrop) Fruit in Response To Postharvest Aloe Vera Treatment
(Taylor & Francis inc, 2022) Ates, Umut; Islam, Ali; Ozturk, Burhan; Aglar, Erdal; Karakaya, Orhan; Gun, Sefa
The effect of Aloe vera application (33% and 66% as dipping, AV) on 'Bluecrop' blueberry's (Vaccinium corymbosum) quality properties such as weight loss, respiration rate, fruit color, soluble solids content (SSC), acidity, phytochemical components (vitamin C, total phenolics, and total flavonoids) and antioxidant activity was investigated during the cold storage (at 0 +/- 0.5 degrees C and 90 +/- 5% RH) for 28 days. During cold storage, significantly lower weight loss was recorded in fruit treated with AV compared to control. At the end of the cold storage, the weight loss was 20% lower in AV treated fruits and AV concentration was not effective in weight loss. On the contrary, the respiration rate (except for the 7th day) and fruit firmness were higher in these fruit. It was observed that color changes were less in AV-treated fruit during storage. In general, AV-treated fruit had significantly lower SSC, while acidity and vitamin C were higher. Moreover, 66% AV application was more effective in delaying the loss of vitamin C at the end of storage. During cold storage, 33% AV-treated fruit had significantly higher total phenolics (except day 28) and total flavonoids content compared to control. In the last two measurements of the cold storage, it was determined that fruit dipped in AV had higher antioxidant activity (both DPPH and FRAP assays) compared to control fruit. As a result, it was revealed that postharvest AV gel applications can be used as an effective postharvest tool to delay the loss of quality, the loss of phytochemical components and antioxidant activity of the blueberry fruit.
Combined Effects of Aloe Vera Gel and Modified Atmosphere Packaging Treatments on Fruit Quality Traits and Bioactive Compounds of Jujube (Ziziphus Jujuba Mill.) Fruit During Cold Storage and Shelf Life
(Elsevier, 2022) Islam, Ali; Acikalin, Raziye; Ozturk, Burhan; Aglar, Erdal; Kaiser, Clive
This study assessed Aloe vera gel (AV) and modified atmosphere packaging (MAP) treatments on weight loss, respiration rate, color, firmness, soluble solids content (SSC), titratable acidity, vitamin C, phenol, flavonoids and antioxidant activity of jujube (Ziziphus jujuba Mill. cv. 'Li') fruit during cold storage and shelf life. Fruit were stored at 0 +/- 0.5 degrees C and 90 +/- 5 % relative humidity (RH) for 35 d followed by 21 +/- 1.0 degrees C and 65 +/- 5 % to simulate shelf life for 4 d. During cold storage, weight loss and respiration rate were delayed by MAP. At the end of cold storage, higher firmness and acidity were measured in fruit treated with MAP compared to control. Also, L*, hue angle, vitamin C, total phenolics, and the antioxidant activity of jujube fruit treated with both AV and MAP were higher than control. However, lower chroma and SSC in fruit treated with MAP were determined. During shelf life storage, higher firmness, L*, hue angle and acidity in fruit treated with MAP were obtained compared to control and AV treatments, whereas lower chroma and SSC were observed. On the last day of shelf life measurement (35 + 4 d), vitamin C, total phenolics, total flavonoids and antioxidant activity (DPPH and FRAP assays) of fruit treated with both AV and MAP was higher than control. In conclusion, it was revealed that AV and MAP treatments could be an effective tool for retarding the losses that occurred in the fruit quality of jujube during cold storage and shelf life. The effect of MAP treatment in maintaining fruit quality was more pronounced.
Effect of Preharvest Biofilm Application Regimes on Cracking and Fruit Quality Traits in '0900 Ziraat' Sweet Cherry Cultivar
(Bmc, 2024) Ozturk, Burhan; Akkaya, Husrev; Aglar, Erdal; Saracoglu, Onur
Background Fruit cracking impacts the quality of sweet cherry, significantly affecting its marketability due to increased susceptibility to injury, aesthetic flaws, and susceptibility to pathogens. The effect of 1% biofilm (Parka (TM)) application regimes on fruit cracking and other quality parameters in the '0900 Ziraat' cherry cultivar was investigated in this study. Fruit sprayed with water were served as control (U1). Fruit treated only once with biofilm three, two and one week before the commercial harvest were considered as U2, U3 and U4, respectively. Fruit treated with biofilm three, two, and one week before harvest were considered as U5; three and two week before harvest as U6; two and one week before harvest as U7; and fruit treated three and one week before harvest as U8.Results In both measurement periods, the lower cracking index was obtained in biofilm-treated sweet cherry fruit. However, the firmness of biofilm-treated fruit was higher than that of the control fruit. The lowest respiration rate was observed in U7, while the highest weight was recorded in U4 and U5 than the control. The biofilm application decreased fruit coloration. The biofilm application also increased the soluble solids content of the fruit. The U2, U3 and U4 applications at harvest showed higher titratable acidity than the control. In both measurement periods, the vitamin C content of the U2, U5, U6, U7 and U8 applications was found to be higher than that of the control. The total monomeric anthocyanin of the U3 and U8 applications was higher than that of the control. Furthermore, the antioxidant activity of the U2, U3 and U5 in the DPPH, and the U7 and U8 in FRAP were measured higher thanthat of the control.Conclusions The application of biofilms has the potential to mitigate fruit cracking, prolong postharvest life of sweet cherries, and enhance fruit firmness.
Effects of Aloe Vera and Modified Atmosphere Packaging on the Quality and Biochemical Properties of Pear Fruit During Cold Storage
(Springer, 2024) Ogurlu, Ferhat; Kucuker, Emine; Aglar, Erdal
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 degrees 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.
Effects of Aloe Vera Gel and Modified Atmosphere Packaging Treatments on Quality Properties and Bioactive Compounds of Plum (Prunus Salicina L.) Fruit Throughout Cold Storage and Shelf Life
(Springer, 2023) Avci, Vedat; Islam, Ali; Ozturk, Burhan; Aglar, Erdal
This study assessed the effects of modified atmosphere packaging (MAP) and Aloe vera gel (AV) treatments on fruit quality and bioactive compounds of plum (Prunus salicina L. cv. 'Black Amber') during cold storage and shelf life. The fruit were stored at 0 +/- 0.5 degrees C and 90 +/- 5% relative humidity (RH) for 35 days followed by 21 +/- 1.0 degrees C and 65 +/- 5% to simulate shelf life for 4 days. The lowest weight loss occurred in fruit treated with MAP during cold storage. The respiration rate was lower with MAP. However, the respiration rate was higher in AV-treated fruit. The MAP treatment maintained fruit firmness, but AV treatment had a negative effect. The AV and MAP treatments did not affect chroma or hue angle color values during cold storage but did influence shelf life. The MAP and AV treatments generally did not affect soluble solids content, but they affected titratable acidity. Vitamin C decreased with the extension of cold storage. However, vitamin C was maintained by MAP and AV treatments, with MAP being the most effective treatment. The MAP and AV treatments did not affect antioxidant activity during cold storage. As a result, MAP treatments positively affected the maintenance of quality characteristics and biochemical content by delaying the maturity of plum fruits during cold storage.
Effects of Aminoethoxyvinylglycine (Avg) on Fruit Quality and Bioactive Content of Jujube Fruit (Ziziphus Jujuba) Harvested at Three Maturity Stages During Cold Storage
(Springer, 2023) Aglar, Erdal
In this study, the effects of aminoethoxyvinylglycine (AVG), sprayed on jujube (Ziziphus jujuba Mill. cv. 'Li') trees 2 weeks before the estimated harvest, and maturity stage on fruit quality characteristics and bioactive compounds during cold storage were investigated. Jujube fruit was maintained at cold storage for 45 days at 0 +/- 0.5 degrees C and 90 +/- 5% relative humidity (RH) conditions, and measurements and analyses were carried out at 15-day intervals. The effect of AVG on retarding weight loss and softening of fruit flesh firmness was evident. At the end of the cold storage, the weight loss of T2 and T6 treatments was the lowest. The lowest respiration rate was measured in the T5 treatment. However, the highest fruit firmness was obtained by T2 and T4 treatments. In the T6 treatment, higher chroma and, in contrast, lower L* and hue angle were measured compared to the other treatments. In T2 treatment, the highest vitamin C and the lowest soluble solids content were obtained; the highest total phenolics in T3, T4 and T5; the highest total flavonoids in T4; and the highest antioxidant activity (DPPH assay) in T1, T3 and T5 treatments. As a result, it was revealed that AVG and maturity stage significantly affect fruit quality during cold storage of jujube fruit, and AVG can be used as a tool to maintain quality.
Effects of Ga3, Caci2 and Modified Atmosphere Packaging (Map) Applications on Fruit Quality of Sweet Cherry at Cold Storage
(Taylor & Francis inc, 2022) Ozturk, Burhan; Aglar, Erdal; Saracoglu, Onur; Karakaya, Orhan; Gun, Sefa
The aim of this study was to investigate the effects of pre-harvest gibberellic acid (GA(3)) and calcium chloride (CaCl2) and post-harvest modified atmosphere packaging (MAP) applications on fruit quality of sweet cherry during the cold storage. At the end of the cold storage, GA(3)+CaCl2 applications in MAP-applied fruit and CaCl2 in non-MAP-applied fruit significantly delayed weight loss compared to the control. During the cold storage, the decay of CaCl2-applied fruit has not been observed. At the end of cold storage, the a* and firmness values of the fruit treated with GA(3) and CaCl2 were significantly higher than the control. The CaCl2-applied fruit had less soluble solids than the control, but they had significantly higher acidity compared to other applications. In MAP, GA(3)- and CaCl2-applied fruit had higher vitamin C and antioxidant activity values than the control fruit, but their total phenolics were higher. However, the total flavonoids of CaCl2-applied fruit were higher than the control. On fruit in non-MAP, with GA(3) application, less anthocyanin was obtained compared to the control. As a result, GA(3)-treated fruit had a relatively lower bioactive compound content compared to the fruit of the CaCl2 and control applications both during the harvest and the cold storage. However, it has been revealed that GA(3) and CaCl2 applications can be used as significant pre-harvest tools to delay the loss of the fruit firmness.
Effects of Rootstock and Training System on Tree Canopy, Fruit Quality and Phytochemicals of '0900 Ziraat' and 'regina Sweet Cherry Cultivars
(inst Tecnologia Parana, 2023) Yilmaz, Umut Naci; Ozturk, Burhan; Aglar, Erdal; Saracoglu, Onur; Kaiser, Clive
Both '0900 Ziraat' and 'Regina' grafted on 'Krymsk 5', or 'Piku 1' rootstocks were trained to either Upright Fruiting Offshoots (UFO), Super Slender Axe (SSA) or Kym Green Bush (KGB) training systems. Vegetative growth of the tree, determined by measuring trunk cross-sectional area (TCSA), canopy volume and leaf area, differed significantly, depending on the cultivar x rootstock x training system combination. In general, 'Krymsk 5' rootstock resulted in trees with significantly thicker trunks (TCSA: 37.75 cm2) and increased leaf area (up to 86.97 cm2). Fruit weight and fruit quality parameters including Hunter a*, firmness, TSS and acidity were variable between rootstocks and training systems and often not significantly different between treatments. In some years however, significant differences were highly dependent on the training system and rootstock interactions. Higher concentrations of bioactive phytochemical concentrations for total monomeric anthocyanin and antioxidant concentrations were mostly associated with the UFO training system in conjunction with the 'Krymsk 5' rootstock suggesting that these are linked to increased tree vigour and increased leaf surface area.
Exploring Genetic Diversity of Turkish Fig (Ficus Carica L.) Germplasm Using Inter-Primer Binding Site (Ipbs) Retrotransposon Markers
(Springer, 2024) Ucer, Viyan Acar; Aglar, Erdal; Mortazavi, Parnaz; Qureshi, Sarmad Ali; Ali, Amjad; Tatar, Muhammed; Baloch, Faheem Shehzad
The common fig belonging to the Moraceae family, is valued for its latex-producing plant parts and commercially important fruit, rich in phenolic antioxidants, nutrients, and fiber, and consumed fresh or dried. The present study aimed to assess the genetic diversity of 73 fig (Ficus carica L.) genotypes collected from the Derecik and & Ccedil;UKURCA districts of the Hakkari Province of Turkey with the inter-Primer Binding Site (iPBS)-retrotransposons marker system. Molecular characterization with 12 most polymorphic primers revealed a total of 255 scorable bands, and 2375 primer produced a maximum of 36 alleles. The polymorphism information content (PIC) was recorded in a range of 0.406-0.455. The genetic diversity indices showed a mean gene diversity of 0.33 and a Shannon's information index of 0.50. The analysis of molecular variance (AMOVA) revealed higher genetic differences within the population (96%) compared to among the population (4%). The population structure and Neighbor-joining analysis-based clustering divided the entire genotype into two groups mainly their collection point. Turkish fig germplasm exhibits significant genetic diversity, which is crucial for breeding programs aimed at enhancing the resilience and productivity of new cultivars.
Impact of Postharvest Putrescine Treatments on Phenolic Compounds, Antioxidant Capacity, Organic Acid Contents and Some Quality Characteristics of Fresh Fig Fruits During Cold Storage
(Mdpi, 2023) Kucuker, Emine; Aglar, Erdal; Sakaldas, Mustafa; Sen, Fatih; Gundogdu, Muttalip
The storage and shelf life of the fig, which has a sensitive fruit structure, is short, and this results in excessive economic losses. In a study carried out to contribute to the solution of this problem, the effect of postharvest putrescine application at different doses (0, 0.5, 1.0, 2.0, and 4.0 mM) on fruit quality characteristics and biochemical content during cold storage in figs was determined. At the end of the cold storage, the decay rate and weight loss in the fruit were in the ranges of 1.0-1.6% and 1.0-5.0 %, respectively. The decay rate and weight loss were lower in putrescine-applied fruit during cold storage. Putrescine application had a positive effect on the changes in fruit flesh firmness values. The SSC rate of fruit varied between 14 and 20%, while significant differences in the SSC rate occurred depending on storage time and putrescine application dose. With putrescine application, the decrease in the acidity rate of the fig fruit during cold storage was smaller. At the end of the cold storage, the acidity rate was between 1.5-2.5% and 1.0-5.0. Putrescine treatments affected total antioxidant activity values and changes occurred in total antioxidant activity depending on the application dose. In the study, it was observed that the amount of phenolic acid in fig fruit decreased during storage and putrescine doses prevented this decrease. Putrescine treatment affected the changes in the quantity of organic acids during cold storage, and this effect varied depending on the type of organic acid and the length of the cold storage period. As a result, it was revealed that putrescine treatments can be used as an effective method to maintain postharvest fruit quality in figs.
The Influence of Fruit Size on Quality Attributes and Bioactive Compounds of Sweet Cherry Fruit
(Springer, 2023) Aglar, Erdal; Saracoglu, Onur; Ozturk, Burhan; Karakaya, Orhan; Ates, Umut
The study was carried out to determine the effect of different fruit sizes on the quality and bioactive compounds of sweet cherry (Prunus avium L. cv. '0900 Ziraat'). The fruit was harvested on the basis of Centre Technique Interprofessionnel des Fruits et Legumes (CTIFL) color category 5, mahogany. The fruit was separated for analysis according to the CTIFL scale: S21 (21 mm), S22 (22 mm), S24 (24 mm), S25 (25 mm), and S26 (26 mm). As the size of the fruit increased, the firmness decreased. The fruit color values varied depending on fruit size. It was determined that the increase in size of the fruit reduced the color values. The soluble solids content and vitamin C values occurred the differences with effect of fruit size. The increasing of fruit size occurred the decreasing in vitamin C content and the increase in the amount of soluble solids. The effect of fruit size on total phenolics, flavonoids, and antioxidant activity was significant. While the highest value of total phenolic content was obtained in S25, the lowest value was determined in S26. In both DPPH and ferric reducing antioxidant power assays, the lowest antioxidant activity was obtained in S26-sized fruit. The individual phenol with the highest concentration in sweet cherry was catechin, and p-coumaric was the individual phenolic with the lowest concentration. There were differences in the concentrations of individual phenolics between fruit sizes. However, it cannot be stated that fruit size had an effect on individual phenolic concentration because this effect was inconsistent.
Influence of Postharvest Putrescine Application on Respiration Rate and Physicochemical Properties of Tomato
(BMC, 2025) Alan, Ozlem; Gundogdu, Muttalip; Sen, Fatih; Aglar, Erdal
BackgroundTomato (Solanum lycopersicum L.) is a species of vegetable that is widely consumed worldwide and has high nutritional value. However, during storage, quality losses occur, especially water loss, decay, acidity loss and vitamin reduction. In this study, the effect of putrescine applications was investigated in order to reduce quality loss in tomatoes during storage. Putrescine is a compound belonging to the polyamine class and provides potential benefits such as delaying fruit ripening, reducing respiration rate and preserving quality. Putrescine solutions were prepared at concentrations of 0.5 mM, 1 mM and 1.5 mM, and sprayed homogeneously onto the surface of tomato fruit for 15-20 s, kept at room temperature and then placed in storage conditions.ResultsIn the study, the changes were observed in weight loss, decay rate, pH and titratable acidity rates in tomatoes as storage period increased. The weight loss rate increased up to 9.31%, putrescine applications reduced this loss to 4.24% especially with the highest dose of 1.5 mM. Putrescine was also effective in preventing fruit decay; at 1.5 mM dose, the decay rate decreased to 7.81%, while in the control group this rate was recorded as 8.76%. Putrescine applications also improved the content of organic acids and vitamin C. During storage, the decrease in organic acids slowed down and the loss of vitamin C remained at lower levels compared to the control group. In addition, putrescine applications maintained the acidic structure of the fruit by controlling the pH and titratable acidity. Respiration rate was kept low by putrescine, which delayed the fruit ripening process. All these findings show that putrescine maintains the fruit quality and extends the shelf life.ConclusionAs a result, putrescine applications play an important role in reducing quality losses during the storage period of tomatoes. Putrescine particularly prevents fruit weight loss, decay, organic acid loss and vitamin C reduction. It also delays the ripening process by slowing down the fruit respiration rate and maintains the nutritional value of the fruit. This study suggests that polyamines such as putrescine offer a potential treatment option for fruit preservation and shelf life extension. Putrescine applications can reduce economic losses by maintaining quality under storage conditions, especially for fruit such as tomatoes.
Kiraz (Prunus Avium L.)’da Hasat Sonrası Melatonin Uygulamasının Depolamada Meyve Kalitesi Üzerine Etkisi
(2023) Küçüker, Emine; Aglar, Erdal; Çelik, Kenan; Özcengiz, Ceyda Kızgın; Oğurlu, Ferhat
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.
Morpho-Genetic Characterization of Fig (Ficus Carica Var. Rupestris (Hausskn.) Browicz) Genotypes To Be Used as Rootstock
(Springer, 2024) Yildiz, Ercan; Aglar, Erdal; Sumbul, Ahmet; Yaman, Mehmet; Caliskan, Oguzhan; Popescu, Gheorghe Cristian; Gonultas, Metin
With its enormous genetic pool, Turkiye is the homeland of the fig and many plant species. The common fig species in the country's natural population are Ficus carica var. caprificus (male figs), Ficus carica var. domestica (female figs; edible figs), and Ficus carica var. rupestris. In this study, the morphological and molecular characterization of 42 genotypes, including those obtained by selection from the Ficus carica var. rupestris (Hausskn.) Browicz population, which is naturally spread in a limited area in Tunceli province, was performed. This study evaluated the qualitative and quantitative characteristics of 23 fig genotypes. These results showed that tree growth habit, lateral shoot formation, apical dominancy, and leaf length characteristics were highly discriminant variables for phenotypic description in wild fig genotypes. The genetic relationship between the genotypes was demonstrated with 12 SRAP and 9 ISSR primers. As a result of the study, it was determined that the genetic similarity values ranged between 0.52 and 0.94. It was determined that the first five essential components (PCA) contributed 20.87%, 13.21%, 10.66%, 9.58%, and 7.11% of the total variation, respectively, and their cumulative rate corresponded to 61.43% of the total variation. Very detailed results on the genetic variation in the fig population in the region were obtained by morphological features and molecular methods. The seven genotypes selected were propagated to determine their potential for dwarf rootstocks. The results of the present study may provide significant leads for further research on this subject. The potential of dwarf rootstocks in figs can be an essential tool for modern fruit growing.
New Approaches in Fig Preservation: Use of Melatonin To Maintain Postharvest Quality of Fig (Ficus Carica L.) Fruit During Cold Storage
(Springer, 2023) Kucuker, Emine; Aglar, Erdal; Gundogdu, Muttalip; Tekin, Onur; Ogurlu, Ferhat; Ozcengiz, Ceyda Kizgin
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.
New Approaches in Pear Preservation: Putrescine and Modified Atmosphere Packaging Applications To Maintain Fruit Quality During Cold Storage
(Wiley, 2024) Ogurlu, Ferhat; Kucuker, Emine; Aglar, Erdal; Ozcengiz, Ceyda Kizgin; Uyak, Cuneyt
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 degrees 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. Putrescine and MAP treatments reduced the storage losses and decay ratio during cold storage in pear. Putrescine and MAP treatments maintained the fruit quality and bioactive compounds of pear during cold storage. Putrescine and MAP treatments have a significant effect on extending the post-harvest life of pear.image