Browsing by Author "Gun, Sefa"

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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.
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.
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.
Training System Plays a Key Role on Fruit Quality and Phenolic Acids of Sweet Cherry
(Springer, 2022) Karakaya, Orhan; Ozturk, Burhan; Aglar, Erdal; Gun, Sefa; Ates, Umut
In the study, the effects of different training systems (Steep Leader: SL, Spanish Bush: SB and Vogel Central Leader: VCL) on quality properties and bioactive components of "0900 Ziraat" sweet cherry fruit (Prunus avium L.) were investigated. The size, color and firmness values of the fruit varied depending on training system. The largest fruit was obtained in the SB training system. The fruit on trees trained VCL and SB had higher firmness than the fruit of trees trained SL. The color values of the fruit of VCL were higher than the other systems, while the vitamin C content was lower. The lowest acidity and soluble solids content (SSC) were measured in fruit trees trained SL. The highest values for bioactive compounds as phenolics, flavonoids were measured in fruit of SL training system. In the sweet cherry fruit, the major phenolic acid was catechin. The catechin, rutin, caffeic acid, 4-hydroxybenzoic acid, 4-aminobenzoic acid and transferulic acid content of the fruit in the SL training system were higher than those of SB and VCL. As a result, it was revealed that there is an effect of the training system on fruit quality; SB training system had higher values in terms of fruit size, whereas in terms of bioactive compound content, SL training system had higher values.
Training System Plays a Key Role on Fruit Quality and Phenolic Acids of Sweet Cherry (Feb, 10.1007/S10341-021-00621-2, 2022)
(Springer, 2022) Ates, Umut; Karakaya, Orhan; Ozturk, Burhan; Aglar, Erdal; Gun, Sefa