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Öğe Alternative postharvest treatments to control decay of table grapes during storage(Druckerei Liddy Halm, 2011) Candir, Elif; Kamiloglu, Onder; Ozdemir, Ahmet Erhan; Celebi, Semih; Coskun, Halil; Ars, Mehmet; Alkan, SerpilThe aim of this study is to determine efficacy of some alternative postharvest treatments to sulfur dioxide (SO2) in maintaining quality and reducing fungal decay during cold storage of table grapes. The table grapes cv. Pafi was subjected to the following treatments after harvest: (1) Hot water dips at 24 degrees C, 45 degrees C, 50 degrees C or 55 degrees C for 3 min followed by packaging in perforated polyethylene (PPE) bags; (2) Packaging with ethanol vapor generating sachets of Antimold (R) 30 or Antimold (R) 60 in PPE bags; (3) Packaging with SO2 generating pad in PPE bags; (4) Packaging in PPE bags. Berries were stored at 0 degrees C for 3 months. Antimold (R) 60 sachet was more effective in reducing fungal decay than control and the SO2 generating pad treatment without adverse effect on quality parameters during 3 months of cold storage. Stem browning occurred at slightly higher level in grapes dipped in hot water or packaged with Antimold (R) 30 sachet and might limit their use, despite providing effective control of fungal decay.Öğe Comparison of open field and protected cultivation of five early table grape cultivars under Mediterranean conditions(Tubitak Scientific & Technological Research Council Turkey, 2011) Kamiloglu, Onder; Polat, Atilla Aytekin; Durgac, CoskunThe production of grapes for early table consumption is becoming more popular in the Mediterranean region of Turkey. In this study, the cultivation of 5 early table grape cultivars ('Ergin cekirdeksizi', 'Uslu', 'Yalova incisi', 'Cardinal', and 'Perlette') in the open field and under protected cultivation were compared in 2004-2005 and 2005-2006 seasons. For the protected culture, the grapevines were covered on 23 February 2004 and 24 February 2005. The phenologic observations, pomologic analyses, yield variables, and primary shoot growth were determined. When compared to open field production, protected production led to 15-18 days earliness. 'Uslu' was the earliest cultivar in both open field and protected cultivation. The cluster weight, cluster width, and cluster length of cultivars did not vary between the different production treatments. Total soluble solids (TSS) and pH values of both of the production types were similar. For 'Yalova incisi' and 'Cardinal', the yield in open field production was higher than that in protected cultivation. In protected cultivation, the effect of production sites on shoot development was greater than it was in the open field. The highest primary shoot length was observed in 'Uslu' in both treatments.Öğe EFFECTS OF DIFFERENT NUMBERS OF BUDS PER UNIT TRUNK CROSS-SECTION AREA ON GROWTH, YIELD AND QUALITY IN THE 'PRIMA' GRAPE (VITIS VINIFERA L.) CULTIVAR(Pakistan Botanical Soc, 2023) Celebi, Hamza; Kamiloglu, OnderIn this study, the effects of varying numbers of winter buds left per trunk unit cross-section area were observed in the Prima grape variety. The treatments were determined by the trunk cross-section areas of vines as 2.0 bud.cm-2, 2.5 bud.cm-2, 3.0 bud.cm-2, 3.5 bud.cm-2, and 4.0 bud.cm-2. The control vines were left as 20 buds for the initial 500 g of cane weight and 10 buds for every subsequent 500 g. The effects of the treatments on certain phenological and physiological characteristics, as well as vegetative development, grape yield, and quality, were researched in the vines. It was determined that the bud burst percentage and the coefficient of bud fertility in the vines were reduced as the number of buds increased (14-32 buds). There was no significant change between the treatments in terms of their numbers of water sprouts and shoots arising from secondary dormant buds. It was determined that the increase in the number of buds left on the vine caused an increase in the number of shoots up to a certain level, and this effect reduced shoot length and shoot diameter development. No significant difference was determined in leaf N, P, K contents or chlorophyll measurements. Grape yield was higher than 3.5 tons in the treatments of 3.0 buds, 3.5 buds, and 4.0 buds per cm2. During the study, no significant difference was observed between the treatments in terms of cluster properties, berry properties (except for berry size), and berry color, or TSS and pH contents in juice. Increased numbers of buds in the study led to an increase in yield, without causing a significant loss in quality, except for the control treatment. According to the results of this study, the recommended number of buds to be left per trunk unit cross-section area, in addition to yield and quality, crop load, which can be recommended with minimal need for summer pruning in terms of vegetative balance, is 3.0 bud.cm-2.Öğe EFFECTS OF KAOLIN AND DEFICIT IRRIGATION TREATMENTS ON SIRAH GRAPE VARIETY IN MEDITERRANEAN, TURKEY(Parlar Scientific Publications (P S P), 2022) Kamiloglu, Onder; Sakaroglu, NihatMediterranean region, which is important in terms of area and production, is a viticultural area with hot and arid climatic characteristics. Grapevine may frequently get exposed to water stress under Mediterranean climatic conditions during its active growth period. Therefore, it is considered that the most important factor that inhibits plant growth is water stress. Potential decrease in precipitation and underground waters in the future makes water management necessary in terms of both the current period and the future. This study involved research on the effect of control (0%) and kaolin (5%) treatment on Sirah variety in different irrigation levels (%25, %50, %75, and %100) on vegetative growth (shoot length, number of nodes and leaf area, pruning weight), physiological characteristics (relative chlorophyll content (SPAD), stomata! conductance, photosynthetic quantum yield (QY), photosynthetically active radiation (PAR), specific leaf area, leaf thickness), grape quality (TSS, pH, acidity) and grape yield. Irrigation period in the vineyard started after berry set and continued until harvest time (the period with the weakest precipitation and the highest temperature). In irrigation treatment, deficit irrigation in comparison with I-4 caused decrease in number of shoot nodes and total leaf area. While decreased water amount did not cause an important change in specific leaf area and leaf thickness of vine, 25% and 50% irrigation caused decrease in chlorophyll content (SPAD) and photosynthetic quantum yield (QY) values in the period near harvest. 25% irrigation caused light intensity in canopy zone of vines to increase and leaf stomatal conductance to decrease. While it was determined that deficit irrigation reduced cluster and berry weight and TSS, pH and maturity index values remained low, grape yield decreased under water stress (25% and 50%). As a result of cumulative effect of kaolin on leaf size and number of shoot nodes, total leaf area decreased in the grapevine. Increase in chlorophyll content and decrease in stomatal conductance and specific leaf area were determined with in terms of leaf physiology. The increase in light intensity of cluster area reduced acidity and increased pH in juice and maturity index toward the ripeness of grapes in vines treated with kaolin.Öğe Effects of modified atmosphere packaging and ethanol vapor treatment on the chemical composition of 'Red Globe' table grapes during storage(Elsevier, 2012) Ustun, Durmus; Candir, Elif; Ozdemir, Ahmet Erhan; Kamiloglu, Onder; Soylu, Emine Mine; Dilbaz, RamazanThe sugar, organic acid, and anthocyanin contents and antioxidant capacity of 'Red Globe' table grapes packaged in perforated polyethylene (PPE) or ZOEpac modified atmosphere packaging (MAP) bags, with or without different grades of ethanol vapor-generating sachets (Antimold (R) 30, Antimold (R) 60 or Antimold (R) 80) or an SO2-generating pad, were evaluated during 3 months of storage at 0 degrees C. Fructose, glucose, malic, and tartaric acid contents remained unchanged in grapes packaged in PPE or ZOEpac bags containing an SO2-generating pad throughout storage. In grapes packaged in PPE or ZOEpac bags with or without Antimold (R) sachets, fructose, glucose, and malic acid contents decreased whereas tartaric acid content increased during storage due to a higher incidence of fungal decay as compared to SO2 treatments. Citric acid content decreased in all treatments during storage. Anthocyanin content increased in the first 2 months of storage and then decreased by the end of storage. An Antimold (R) 80 sachet added to ZOEpac bags resulted in higher anthocyanin content, ferric-reducing antioxidant power (FRAP) and trolox equivalent antioxidant capacity (TEAC) during storage. (C) 2012 Elsevier B.V. All rights reserved.Öğe The effects of rootstocks and training systems on the growth and fruit quality of the 'Round Seedless' grape(Wfl Publ, 2012) Kamiloglu, OnderThe effects of rootstocks and training systems on the 'Round Seedless' grape were evaluated for several quality characteristics. The trial was conducted in 2004/2005 and 2005/2006 in the Mediterranean region of Turkey, which has a subtropical climate. The experimental plots were planted in 1997 with grafted vines. 'Round Seedless' vines grown on 6 rootstocks (41B, 1616C, 1613C, 110R, Rupestris du Lot, 140Ru) were trained on two different trellis systems (Australia and Lenz Moser). No significant differences in vegetative growth, compatibility constant or yield per vine were found between the training systems. The cluster and berry properties and the acid and pH contents of the juice were similar for both training systems. The 110R and 1613C rootstocks yielded higher values for the cluster properties than the other rootstocks, whereas the 110R rootstock yielded higher values for the berry properties than the other rootstocks. The effects of the rootstocks on the acidity and pH of the juice and on the TSS/acidity value were not statistically significant. No significant differences in pruning weight were found among the rootstocks. The highest yield values among the rootstocks were shown by 110R (5.88 kg vine(-1)) and 41B (5.65 kg vine(-1)). No significant influence of the training systems was observed. 'Round Seedless' grapes grafted on 110R produced the highest yield and good fruit quality.Öğe EFFECTS OF WATER STRESS ON PLANT GROWTH AND PHYSIOLOGICAL CHARACTERISTICS OF SOME GRAPE VARIETIES(Parlar Scientific Publications (P S P), 2014) Kamiloglu, Onder; Sivritepe, Nuray; Onder, Sermet; Daghan, HaticeThe objective of the present study is to investigate the physiological, morphological and structural changes induced by water deficit on four different table grape cultivars that are commonly cultivated in the Mediterranean region. One-year-old vine (Vitis vinifera L.), cultivars 'Crimson Seedless', 'Superior Seedless', 'Razaki' and 'Horoz Karasi' grafted onto 1103 P rootstock were grown in a greenhouse in a soil/farmyard manure/sand/turf mixture (2:1:1:0.5) in pots; and subjected to water stress for 40 days. A 60% limitation of the available water caused total leaf area and dry weight decrease as well as negative impact on growth in all cultivars. As a result of this application, a distinctive decrease in root growth was observed in the Crimson Seedless, Superior Seedless and Razaki cultivars, in comparison with the control. While there was no significant change in grade of leaf thickness, leaf tissue density, or leaf succulence during water stress application, increases in leaf K, Fe, Cu, and Zn contents, chlorophyll content, and leaf electrolyte leakage were observed. Significant differences were seen among the grape cultivars in terms of adaptation to aridity conditions. Generally, the most sensitive grape cultivar in terms of tolerance to water stress was Superior Seedless, whereas the cultivar that can optimally adapt to conditions of higher aridity was Horoz Karasi.Öğe Fatty Acid Composition, Total Phenolic Content and Antioxidant Activity of Grape Seed Oils Obtained by Cold- Pressed and Solvent Extraction(Assoc Pharmaceutical Teachers India, 2019) Konuskan, Dilsat Bozdogan; Kamiloglu, Onder; Demirkeser, OzgeAim: The aim of this study was to determine the influence of two different extraction methods on the fatty acid composition, total phenolic content and antioxidant activity of grape seed oils obtained from 5 different varieties. Materials and Methods: The seeds of the Syrah, Merlot, Sangiovese, Cabernet Sauvignon, Sauvignon Blanc grape varieties were used in this study. Oil extraction was carried out by Soxhlet extraction and cold-pressed extraction methods. Results: The most abundant fatty acids in the grape seed oils that were obtained were linoleic acid, oleic acid and palmitic acid ranging from 64.80 to 68.64%, 18.41 to 21.58% and 7.08 to 8.23%, respectively. The linoleic and palmitic acid values that were determined in the grape seed oils obtained by solvent extraction were higher than those for the grape seed oils obtained from the cold-pressed samples. The total phenolic content and antioxidant activity of the grape seed oils varied between 115.68 and 317.71 mg GAE/kg, 7.14 and 34.46% as DPPH radical scavenging activities, respectively. Conclusion: The total phenolic content and antioxidant activity values for the grape seed oils obtained by solvent extraction were higher than those determined in the grape seed oils obtained by cold-pressing.Öğe IDENTIFICATION OF PHENOLOGICAL PERIODS AND YIELD, QUALITY AND VEGETATIVE CHARACTERISTICS OF SOME WINE GRAPES GROWN IN THE EASTERN MEDITERRANEAN REGION OF TURKEY(Univ Life Sciences Lublin, 2020) Demirkeser, Ozge Kaya; Kamiloglu, OnderIt is possible to talk about the wine culture, from past to present, in the historical texture in the Eastern Mediterranean region of Turkey. This study was carried out in Belen district of Hatay province located in the Eastern Mediterranean region. Wine grape cultivars 'Syrah', 'Merlot', 'Sangiovese', 'Cabernet Sauvignon' and 'Sauvignon Blanc' were researched for 2 years (2016 and 2017) in terms of phenological characteristics, effective heat summation (EHS) requests and maturity time, some quality characteristics and grapevine yield and vegetative growth. Under the conditions of the study, bud break of cultivars took place at the end of March, blooming in late April-early May, and maturity in late July-early August. Bud break-maturity period EHS requests of cultivars ranged from 1540.9 to 1999.2 d.d. (day.degree). Cultivars reached the optimum total soluble solids (TSS) values under the regional conditions, while the total acidity (TA) content was low in cultivar 'Sauvignon Blanc'. In color cultivars, maturity index were found to be in the range of the optimum values. Berry weight values of the cultivars ranged from 1.06 g ('Cabernet Sauvignon') to 2.15 g ('Sangiovese'). Ravaz index values were low due to high vegetative growth. It was foreseen that this situation could be put under control via summer pruning. It was concluded that wine grape could be grown at sufficient quality and yield level with cultivars 'Sangiovese', 'Merlot', 'Cabernet Sauvignon' and 'Syrah' under the conditions of Belen where the study was conducted.Öğe Phenotypic variation in physico-chemical properties among cactus pear fruits (Opuntia ficus-indica (L.) Miller) from Turkey(Wolters Kluwer Medknow Publications, 2009) Toplu, Celil; Serce, Sedat; Ercisli, Sezai; Kamiloglu, Onder; Sengul, MemnuneSeveral physico-chemical properties such as fruit weight and dimensions, skin width, external and internal fruit color, vitamin A, vitamin C, acidity, pH, soluble solid content, antioxidant activity and total phenolic content of twenty five selected promising cactus pear accessions were determined. Antioxidant activity and total phenolic content of fruits were determined by -Caroten bleaching and Folin-Ciocalteu assays. The results showed great qualitative and quantitative differences in the physico-chemical characteristics of cactus pear accessions. Vitamin A (beta carotene) and vitamin C (ascorbic acid) content of genotypes were found between 2.64 and 25.13 (g/g) and 18.04 and 37.31 mg/100 g. Antioxidant activity and total phenolic content of cactus pear genotypes were between 45.5-76.8 and 19.4-49.4 mg gallic acid equivalent per g dry weight basis. The results provide important information on how to make the best use of cactus pear genotypes investigated for different uses, which is of significance for both technological research and processing practice.Öğe Phytochemical characterization of several hawthorn (Crataegus spp.) species sampled from the Eastern Mediterranean region of Turkey(Wolters Kluwer Medknow Publications, 2012) Caliskan, Oguzhan; Gunduz, Kazim; Serce, Sedat; Toplu, Celil; Kamiloglu, Onder; Sengul, Memnune; Ercisli, SezaiBackground: We evaluated the total phenolic content, antioxidant capacity as well as antioxidant activity of five Crataegus species (A1, A2, Y1, Y2, Y4 accessions of Crataegus aronia var. aronia; B2, B3, B5, B6, B7, B9, Y5 accessions of C. aronia var. dentata; B10 accession of C. aronia var. minuta; Y3 accession of Crataegus orientalis var. orientalis and A3 accession of Crataegus monogyna subsp. azarella). Materials and Methods: Antioxidant activity and total phenolic content of fruits were determined by -carotene bleaching and Folin-Ciocalteu assays. Antioxidant capacity was determined by using 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay. Results: C. monogyna subsp. azarella had the highest total phenol, antioxidant activity and antioxidant capacity of 55.2 mg gallic acid equivalents (GAE)/g dry weight (DW), 81.9 and 31.2, respectively. C. aronia var. aronia was found to have the lowest total phenolic content (35.7 mg GAE/g DW). The antioxidant activities of fruit extracts increased in the order of C. orientalis var. orientalis < C. aronia var. minuta < C. aronia var. dentata < C. aronia var. aronia < C. monogyna subsp. azarella according to -carotene/linoleic acid assay. In recent years, C. aronia var. dentata has gained importance as a commercial species in this region. B3 and B7 accessions had fruit weight more than 14 g, and considerable total phenol content, antioxidant activity and antioxidant capacity. Conclusion: This investigation shows the potential value of hawthorn fruit species as a good source of natural antioxidants and that consumption of hawthorn fruit or its products may contribute substantial amounts of antioxidants to the diet.
