Browsing by Author "Saracoglu, Onur"

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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 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.
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.
Rootstock and Training Effects on Growth and Fruit Quality of Young '0900 Ziraat' Sweet Cherry Trees
(Springer, 2024) Aglar, Erdal; Ozturk, Burhan; Saracoglu, Onur; Long, Lynn Edwards; Yildiz, Kenan; Gun, Sefa; Has, Sirin
The study was conducted to determine the performance of '0900 Ziraat' cultivar grafted on Krymsk 5, Gisela 6 and Piku 1 rootstocks, and the effects of the combinations of these rootstocks with four training systems on yield and quality of sweet cherry. The rootstocks and training systems had a significant effect on vegetative growth and fruit quality. Krymsk 5 x Vogel central leader produced the largest trees. There were no differences between the rootstocks in terms of fruit size; however, the largest fruit was obtained from trees trained to Vogel central leader (VCL) and super slender axe (SSA) as compared to Kym Green bush (KGB) and upright fruiting offshoots (UFO). The coloration on the fruit of the trees grafted on Piku 1 and Krymsk 5 rootstocks and trained to the SSA training system was better and the fruit firmness values were higher with the Gisela 6 x SSA combination. The highest soluble solids content (SSC) values were recorded with Piku 1 x SSA and Gisela 6 x SSA combinations. The bioactive compound content of the fruit varied depending on the rootstock and training system. The fruit of Piku 1 x VCL combination had higher total phenolic content. Antioxidant activity was higher in Krymsk 5 x UFO combination. The study revealed that fruit quality was better with SSA and VCL training systems.