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    Characterization of European cranberrybush (Viburnum opulus L.) genetic resources in Turkey
    (Elsevier, 2020) Ozrenk, Koray; Ilhan, Gulce; Sagbas, Halil Ibrahim; Karatas, Neva; Ercisli, Sezai; Colak, Aysen Melda
    In this study, a comprehensive morphological and biochemical characterization of 14 European Cranberrybush (Viburnum opulus L.) genotypes that were collected from Gumushane province of Turkey is provided. Additionally, their potentials as cultivar candidate, natural antioxidants, colorants and ingredients were exploited. Yield per bush, fruit weight, number of fruits per raceme and number of racemes per bush were ranged from 4.7 kg to 6.2 kg; 0.53 to 0.86 g; 34.4-53.1 and 119-307 among genotypes indicating high diversity. The majority of genotypes (8) had red fruit skin color and rest of the genotypes had equally light red and dark red fruit skin color. European Cranberrybush fruits had medium level vitamin C content (28 - 43 mg per 100 g fresh fruit) and the genotypes had SSC (Soluble Solid Content) between 10.40 and 12.20 %. Crude protein and crude cellulose of the genotypes varied from 5.67 to 6.71 (%) and 16.6-18.7 (%), respectively. Total phenol and total anthocyanin content ranged from 696 to 830 mg gallic acid equivalent per 100 g fresh weight and 27.6-54.3 mg per 100 g fresh fruit expressed cyanidin-3-glucoside. Antioxidant activity were found between 27.67 and 35.65 mu mol trolox equivalents per g fresh fruit based on FRAP (Ferric Reducing Ability of Plasma) assay. Total lipid content ranged from 10.3-13.3 (%) and oleic acid was dominant fatty acids for all genotypes (57.3-70.4). Local genotypes are found to be promising for further valorization through horticultural characteristics and novel antioxidants, colorants and ingredients.
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    Investigation of Some Physicochemical Traits and Changes After Storage of Fruits Belonging to 'Zivzik' Pomegranate Genotypes Grown in Siirt, Turkey
    (Springer, 2022) Ozrenk, Koray; Turk, Bilge; Sen, Fatih; Keskin, Nurhan; Kaya, Ozkan
    Pomegranate genotypes called 'Zivzik' are widely grown in Siirt, Turkey, and these genotypes have sweet, tart, and sour fruits. This study was carried out to determine the physicochemical traits of fruits belonging to 'Zivzik' pomegranate genotypes, as well as changes in fruit characteristics after storage. Sweet, tart, and sour 'Zivzik' pomegranate genotypes were harvested in Sirvan and Pervari districts of Siirt. The fruits were placed in modified atmosphere packages and kept at 6 degrees C and 90% relative humidity for 3 months. Some physicochemical traits were determined in both harvested and stored pomegranate fruits. Fruit weight (280.8 g), berry weight (0.41 g), fruit width (84.5 mm), and fruit length (8.57 mm) of the fruits of the sweet pomegranate genotype were found to be higher than in the other genotype fruits. However, the total soluble solids content (17.57%), titratable acid content (3.02 g/100 ml), total phenol content (163.43 mg GAE/100 ml), and antioxidant activity (49.95 mu mol TE/ml) of the fruits of the sour pomegranate genotype were higher than in fruits of other genotypes. There were differences between pomegranate genotypes in fruit peel color and berry size. After storage, there was a significant decrease in the titratable acid content of fruits in all genotypes, while their total soluble solids, total phenol content, and antioxidant activities increased. However, no significant change was found in fruit peel color in any genotype. Consequently, there were differences between the physicochemical traits of the fruits belonging to the sweet, tart, and sour 'Zivzik' pomegranate genotypes, but there were no significant changes in these traits after storage.
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    IRRIGATION FACILITIES, PROBLEMS AND SOLUTIONS CONCERNING PISTACHIO GROWING IN SIIRT REGION
    (Univ Agronomic Sciences & Veterinary Medicine Bucharest - Usamv, 2016) Aydin, Yusuf; Saltuk, Burak; Atilgan, Atilgan; Yucel, Ali; Ozrenk, Koray
    Growing of Siirt type of pistachio has a significant potential in the agriculture of Siirt province. As a result of the studies on this issue performed by public and legal institutions in recent years, while about 2000 tons of products were taken from the area in 4545.3 ha in 2002, these values reached about 11.000 tons of products in 25.000 ha by the end of 2014. Considering the climatic conditions of the region, the fact that summer is very hot and irregularity in the precipitation regime further increase the importance of irrigation and make it necessary for cultural practices in farming. However, pistachio orchards are not irrigated or tried to be contented with a little water due to the reasons such as the topographical structure of the area where farming is performed, irrigation water constraints, and any other reasons. The questionnaire study was carried out to determine the local farmers' tendencies on Siirt pistachio irrigation, problems faced, and the solution offers. For this purpose, the questionnaire form consisting of 40 questions was prepared, and data were collected using the Simple Random Sampling method. By this method, questionnaires were filled in by making face to face interviews with 177 farmers in 73 villages of 7 districts where farming is intensively performed. The obtained data were analyzed using MINITAB 16 statistical program. As a result of the statistical analyses, an attempt to contribute to the solution of the problems was made by developing solutions to identified problems.
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    MOLECULAR CHARACTERIZATION AND GENETIC RELATIONSHIPS OF WILD APRICOTS (PRUNUS ARMENIACA L.) FROM TURKEY USING SSR MARKERS
    (Publ House Bulgarian Acad Sci, 2020) Ozrenk, Koray; Ozkan, Gursel; Akin, Meleksen; Orhan, Emine; Eyduran, Sadiye Peral; Ercisli, Sezai
    In the present study we used a total of 29 wild apricot genotypes sampled from 3 regions (Erzincan, Coruh valley, and Aras valley) which were evaluated by means of simple sequence repeat (SSR) markers. In total, 16 simple sequence repeat (SSR) loci were used and 98 alleles were revealed with a mean number of 6.13 alleles per locus and mean polymorphic information content (PIC) of 0.66 showing a high genetic diversity of Turkish wild apricots. A larger expected heterozygote than the observed was found in the analyzed genotypes. Clustering of individual accessions based on UPGMA dendrogram separated accessions into three major clusters according to their geographic origin and indicating high variability among genotypes. The information obtained in this study implies that the studied genotypes were distant from each other and can be used for apricot breeding strategies and for the management and the conservation of Turkish apricot germplasm.
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    Organic acids, sugars, vitamin C content and some pomological characteristics of eleven hawthorn species (Crataegus spp.) from Turkey
    (Soc Biolgia Chile, 2014) Gundogdu, Muttalip; Ozrenk, Koray; Ercisli, Sezai; Kan, Tuncay; Kodad, Ossama; Hegedus, Attila
    Background: The Hawthorn (Crateagus sp.) mostly occurs around the temperate region of the world with a high number of species, producing a fruit with numerous beneficial effects for human health. The aim of the study was to determine organic acid and sugar contents in the fruit of a number of hawthorn species grown in Erzincan province of Turkey. Results: Citric acid was the predominant organic acid in all hawthorn species and C. pseudoheterophylla had the highest citric acid content (23.688 g/100 g). There were not statistically significant differences among hawthorn species (except C. atrosanguinea Pojark) in terms of fumaric acid content. C. pontica C. Koch had a higher content of vitamin C (9.418 mg/100 g) compared to other species. Fructose was the predominant sugar component in all species and C. monogyna subsp. monogyna Joiq had the highest fructose content (18.378 g/100 g). Conclusions: The high fruit quality of the studied species indicates the importance of this fruit in human nutrition as a natural source. The study revealed that there were differences in terms of fruit characteristics among hawthorn species and thus better quality hawthorn genotypes can be selected within the species. Hence, this study is considered to be a valuable reference for forthcoming studies. The high fruit quality of the studied species indicates the importance of this fruit in human nutrition as a natural source.
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    PHYSICOCHEMICAL SUBSTANCES AND BIOACTIVE COMPONENTS OF WILD CORNELIAN CHERRY (Cornus mas L.) FRUITS IN ERZINCAN PROVINCE OF EASTERN TURKEY
    (Serbian Genetics Soc, 2023) Ozrenk, Koray; Tas, Akgul; Gundogdu, Muttalip; Keskin, Nurhan; Ercisli, Sezai
    Turkey has a very rich flora due to diverse climatic and topographic conditions within the country. Cornelian cherry (Cornus mas L.) is an important wild edible fruits and widely distributed in Turkey and well known for its fruit antioxidants and nutrients. In this study, phytochemical content in fruits of a number of Cornelian cherry genotypes in Erzincan region were determined. The biochemical analysis included organic acids, sugars, vitamin C, antioxidant and individual phenolic compounds. In the study, organic acid content was between 253.09 mg/100 g and 112.50 mg/100 g. Vitamin C content varied between 115.85 mg/100g and 43.77 mg/100 g. Likewise, the sugar content of Cornelian cherry fruits varied from 6.17 g/100 g to 4.06 g/100 g. When the antioxidant content was examined, the highest antioxidant was 980.91 limol TE/g fresh weight (FW) base and the lowest was 490.38 limol TE/g FW. In the genotypes examined, gallic acid was determined as the highest among the individual phenolic compounds, while the individual phenolic amounts ranged from 38.93 mg/100 g FW to 4.31 mg/100 g FW. As a result of the study, it was determined that Cornelian cherry fruits are very rich in vitamin C and other phytochemicals and as a result of this examination, 24ER04 and 24ER08 genotypes came to the fore.
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    The comparison of phenolic compounds content, antioxidant capacity and molecular analysis of some selected Turkish pear genotypes
    (Parlar Scientific Publications, 2018) Ozrenk, Koray; Erez, Mehmet Emre; Altintas, Serdar; Inal, Behcet
    The current study was focused on molecular analysis using internal cpDNA trnL intron sequence, antioxidant activity, total phenolics and flavonoid contents of fifteen pyrus genotypes. Quite variations were determined in biochemical characteristics and molecular systematic analysis of genotypes evaluated. "Y. Karçin" genotype was detected as the best graded genotype based on the high contents of the total phenolic (7,92 mg GAE/g) and total flavonoid (4,50 mg RE/g) content. The obtained results showed that, genotypes could be categorized of six main clades with robust bootstrap values, which might be useful to improve genetic diversity among genotypes for breeding. © by PSP.
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    THE COMPARISON OF PHENOLIC COMPOUNDS CONTENT, ANTIOXIDANT CAPACITY AND MOLECULAR ANALYSIS OF SOME SELECTED TURKISH PEAR GENOTYPES
    (Parlar Scientific Publications (P S P), 2018) Ozrenk, Koray; Erez, Mehmet Emre; Altintas, Serdar; Inal, Behcet
    The current study was focused on molecular analysis using internal cpDNA trnL intron sequence, antioxidant activity, total phenolics and flavonoid contents of fifteen pyrus genotypes. Quite variations were determined in biochemical characteristics and molecular systematic analysis of genotypes evaluated. Y. Karcin genotype was detected as the best graded genotype based on the high contents of the total phenolic (7,92 mg GAE/g) and total flavonoid (4,50 mg RE/g) content. The obtained results showed that, genotypes could be categorized of six main clades with robust bootstrap values, which might be useful to improve genetic diversity among genotypes for breeding.