Sürdürülebilir Kalkınma Amaçları

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• MakaleYalnız künye2026Scopus SJRQ2/r/munzur/1315
  Drying temperature-dependent changes in grape seed bioactives and oxidative status: integrated HPLC/GC and multivariate analysis

  Karaca Sanyürek, Nesrin

  Abstract: Drying temperature (40–80 °C) critically influences the stability of bioactive compounds in grape seeds and their functional responses. In this study, we evaluated the vitamin and phytosterol content of Boğazkere grape seeds using high-performance liquid chromatography (HPLC) and the fatty acid content using gas chromatography (GC). Antioxidant capacity was determined using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay and the oxidative stress marker, malondialdehyde (MDA). Temperature-dependent and compound-specific alterations were observed: while selected vitamins and phytosterols showed distinct thermal susceptibilities, fatty acid profiles exhibited measurable remodeling. Antioxidant activity revealed non-linear dose- and temperature-dependent patterns, whereas MDA consistently decreased with increasing temperature, reflecting the reduced oxidative metabolism in dehydrated tissues. Multivariate analysis, including principal component analysis (PCA) and heatmap visualization, effectively discriminated temperature treatments and revealed correlations between compositional and functional parameters. The combined use of univariate and multivariate analyses revealed that the drying temperature reshaped not only individual bioactive compounds but also the overall biochemical profile of grape seeds. These findings establish a mechanistic link between thermal processing and bioactive stability, providing a chemical basis for optimizing grape seed valorization in food systems.

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  İncele
• MakaleAçık Erişim2026Scopus SJRQ1/r/munzur/1206
  Comprehensive Analysis of Phytochemical Compounds in Seeds of Indigenous Grape Varieties Cultivated in Southeastern Anatolia: Fatty Acids, Tocopherols, Phytosterols, Vitamins, and Antioxidant Properties

  Odabaşioğlu, Mehmet İlhan; Çakır, Atilla; Karaca Sanyürek, Nesrin; İşlek, Fırat

  Aim: In this study, the phytochemical composition of the seeds of twelve different local grape (Vitis vinifera L.) varieties traditionally cultivated in the Southeastern Anatolia Region (Diyarbakır, Türkiye) was investigated using a holistic approach. The main objective of the study was to evaluate the associations of the effects of berry skin colour, the ripening stage and utilization type on the fatty acid profile, tocopherol and phytosterol contents, vitamin K and D levels, antioxidant capacity (DPPH) and lipid peroxidation (MDA) of grape seeds. Method: The seeds of grape varieties belonging to four different colour groups, grown on their own roots, were harvested during the 2017 growing season and analysed. Fatty acid composition was determined by gas chromatography (GC), vitamin and phytosterol contents by HPLC-UV, MDA content by the thiobarbituric acid reactive substance (TBARS) method, and antioxidant capacity by the DPPH radical scavenging assay. Findings: Linoleic acid was identified as the predominant fatty acid in all varieties (53.68–67.06%), followed by oleic acid (13.80–27.32%). α-Tocopherol was identified as the predominant tocopherol form (1.597–4.703 mg kg−1), whilst β-sitosterol was the phytosterol component present at the highest level (915.67–3340.42 µg g−1). Statistically significant varietal differences were detected for most measured phytochemical parameters. Group-wise differences associated with berry skin colour and ripening stage were observed for selected traits. Overall, varietal differences appeared to be more pronounced than those associated with berry skin colour or ripening stage. It was observed that the differences in phytochemical composition between the various commercial classifications of grapes were very limited. Result: The findings reveal that the seeds of the local grape varieties studied exhibit a rich phytochemical profile and represent an important source of bioactive compounds that could be utilised, particularly in the functional food, nutraceutical and cosmetics industries. The ‘Tahannebi’ variety stood out as the one with the highest values across many parameters. Differences observed among samples of the same cultivar collected from different vineyards suggest that vineyard-specific conditions may contribute to variation in selected phytochemical traits. Future multi-year and multi-location studies are needed to confirm the stability of these phytochemical profiles and to further clarify genotype × environment interactions.

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• MakaleAçık Erişim2026Scopus SJRQ1/r/munzur/746
  Biogenic amine profiling of fruit wines by high-performance liquid chromatography with fluorescence detection after OPA derivatisation: effect of fruit type

  Tok, Fırat; Çetin, Burcu; Karaca Sanyürek, Nesrin

  This study aimed to characterise the biogenic amine (BA) profiles of fruit wines produced from different raw materials and to investigate their association with pH and fruit type. Ten commercially available fruit wines, including pomegranate, black mulberry, sour cherry, strawberry, melon, blackberry, and blueberry, were analysed using HPLC with fluorescence detection (HPLC-FLD) following pre-column derivatisation with o-phthalaldehyde. Putrescine, tyramine (TYR), and histamine were identified as the predominant amines, with total BA concentrations ranging from 11.62 to 53.96 mg/L depending on the fruit type. The pH values of the wines (3.28-3.60) were inversely related to acidity and showed a strong positive correlation with total BA content (r = 0.97, p < .001). Among the detected compounds, TYR exhibited the highest sensitivity to pH variation. Multivariate analysis using principal component analysis clearly differentiated the samples into two distinct groups: low pH-low BA wines (pomegranate and blueberry) and high pH-high BA wines (blackberry and strawberry). The HPLC-FLD method demonstrated excellent analytical performance, with high chromatographic stability (retention time RSD < 1%) and reliable compound identification. Overall, the results indicate that BA formation in fruit wines is closely associated with both pH and fruit type, reflecting the combined effects of raw material composition and fermentation conditions. These findings provide valuable insights into the biochemical characterisation, quality assessment, and safety evaluation of fruit wines in oenological applications.

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• MakaleYalnız künye2025Scopus SJRQ2/r/munzur/846
  Ampelographic and population structure analysis of grape accessions under eastern anatolia conditions-Türkiye (Tunceli), assessed by SSR markers

  Karaca Sanyürek, Nesrin; Söylemezoğlu, Gökhan; Yüksel Özmen, Canan; Ergül, Ali; Ovayurt, Çağrı

  Türkiye, which holds an important agricultural spot in the world with its ecological conditions for the cultivation of numerous plant species, has a highly rich genetic potential in terms of the genetic resource diversity of grapes. The Tunceli province, located in the Eastern Anatolia region, is a Turkish region with a harsh terrain structure. This study aims to perform the genetic characterisation and identification of the grape accessions within the Tunceli province, which are not included in the national collection vineyard and are at risk of extinction. In this study, ampelographic characterisation was conducted using a set of 78 descriptors (Vitis species) established by the OIV (Organisation Internationale de la Vigne et du vin) and a Principal Component Analysis was performed. A total of 54 grape samples, consisting of 52 indigenous (from six different regions/populations), 2 reference samples, 1 identical, 1 synonymous, and 4 homonymous cases, were identified using 6 SSR markers. In the structure analysis, it was observed that there was significant gene flow among the Tunceli region populations. Moreover, through the Bayesian analysis, it was determined that the Tunceli region populations (except for the reference population) had a high degree of admixture. In the FCA analysis (with the reference population), it was found that the Akpazar population in particular and, partially, the Mazgirt population, exhibited distinctions. However, genetic distance data also confirmed the distance of the Akpazar population from others. In the RPPs clustering analyses, while the entire population was distributed across 4 different RPPs, 39 accessions (72%) were assigned to one of the RPPs with a membership probability greater than 80%.

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  İncele
• MakaleAçık Erişim2024/r/munzur/6292
  Allelopathic Effects of Essential Oils In Some Medicinal And Aromatic Plants on The Development of Oilseed Plants

  Aydın, Sevinç; Karaca Sanyürek, Nesrin; Yaman, Hümeyra; Yılmaz, Ömer

  Traditional methods used to increase plant productivity from the past to the present cause problems owing to their toxicological effects on organism resistance and living things. This has stipulated the creation of strategies to boost plant productivity without adversely affecting the health of living things. Essential oils secreted from various parts of plants stand out as, sustainable, and improvable alternatives and have been the subject of numerous types of research as they have many functional properties. The present research covers the investigation of the allelopathic effect of essential oils of Greek Oregano (Origanum vulgare L. subsp. hirtum), Lavandin (Lavandula x intermedia), and common sage (Salvia officinalis L.) on oilseed plants (Cephalaria syriaca L., Camelina sativa L.) at different ratios. Inhibitory effects of the essential oils obtained by hydrodistillation on the seeds of Cephalaria syriaca L. and Camelina sativa L. species at different concentrations were analyzed under sterile in vitro conditions. The inhibitory effects of essential oils and concentrations were analyzed using the Friedman test. The research revealed that essential oils were effective in weed control through their high inhibitory effect against Cephalaria syriaca L. seeds while reducing the germination power of Camelina sativa L.

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  AtıfOpenAlex2

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• MakaleYayıncıda açık erişim2023Scopus SJRQ3/r/munzur/3085
  Vitamin content and MDA levels of certain white grape varieties from different altitudes in Turkey

  Akbaba, Emel; Aydın, Sevinç; Sanyürek, Nesrin Karaca; Çakır, Atilla; Erişir, Figen Erdem

  Grapevine (Vitis vinifera L.) is regarded as one of the world’s most important fruit crops in terms of acreage and commercial worth. Grapes are used to make not only wine but also fresh fruit, dried fruit, and juice. The quality of grapes or wine is significantly affected by environmental factors such as altitude, soil type, and climate. In this study, the 5 white grape varieties (Ağın beyazı, Tahannebi, Kabarcık, Şilfoni, and Besni) grown at different altitudes (800 m, 1000 m and 1200 m) in Turkey were investigated for their vitamin, and phytosterol concentrations as well as lipid peroxidation content. Şilfoni grape harvested at 800 m was found to possess the lowest lipid peroxidation content. High altitudes, were found to reduce lipid peroxidation contents in the Ağın beyazı, Tahannebi, and Kabarcık strains. The highest stigmasterol (98.34 μg/g), and beta-sitosterol (86.90 μg/g) concentrations were found within Şilfoni grape variety harvested at 800 m. The highest vitamin D-2 and D-3 levels were found in Ağın beyazı (1.39 μg/g) and Kabarcık (4.13 μg/g) grape varieties, both harvested at 1200 m. Kabarcık grape, however, revealed the highest concentrations of R-tocopherol (63.09 μg/g) and alpha-tocopherol (24.13 μg/g) at 1200 m within the samples. The highest vitamin K-2 level was determined within the Tahannebi grape (15.44 μg/g) from 1200 m. It was observed that the vitamin and phytosterol concentrations of white grape varieties tended to increase, while the lipid peroxidation values tended to decrease at high altitudes, especially at 1200 m. This study also exhibited a strong relationship among Vitamin D3, R-tocopherol, and alpha-tocopherol in the studied white grape cultivars.

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  AtıfScopus5·WoS5·OpenAlex3

  İncele
• Derleme MakaleAçık Erişim2023Scopus SJRQ3/r/munzur/2355
  Obtaining haploid plants by irradiated pollen culture in oil seed crops

  Yaman, Hümeyra; Sanyürek, Nesrin Karaca

  Haploid plant production is of great importance to shorten the breeding period in plant breeding programs. Obtaining pure lines in plant growing programs require an intensive work with huge labor and time. Obtaining one hundred percent homozy-gous pure lines is a key point for the improvement and development of new cultivars. Haploid plants with a single set of homozygous chromosomes have become a valuable tool in plant breeding. Dihaploid plants that are homozygous at all loci with dou-bling of their chromosomes can be propagated by seed and reach full homozygosity in a single generation. Traditional methods take seven years to reach homozygosity. Dihaploidization methods provide significant advantages in terms of gaining homozy-gosity in a short period of one year and bringing pure lines into agriculture. Anther culture and irradiated pollen technique are among the most widely used techniques in this respect; where physical or chemical agents are used to induce mutated pollen grains and anthers that are subsequently employed to develop dihaploids through in vitro cultures. These techniques are a good source to facilitate gene mapping, cyto-genetic research, and evolutionary studies. Irradiated pollen culture techniques have been applied to many oilseed crops to obtain pure lines. This study highlights some salient features of producing dihaploids using irradiated pollen grains and their maintenance.

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  AtıfScopus1·OpenAlex2·TR Dizin1

  İncele
• MakaleYalnız künye2023Scopus SJRQ3/r/munzur/1996
  Comprehensive Evaluation of the Relationships Between Grape Skin Color/Ripening Time and Antioxidative Capacity, Some Phytochemicals, and Fatty Acid Compositions of Their Seeds

  Çakır, Atilla; Odabaşıoğlu, Mehmet İlhan; Karaca Sanyürek, Nesrin; Aydın, Sevinç

  It has been proven that grapes, which are widely cultivated around the world, have positive health effects. However, the phytochemical composition of lesser-known local varieties of Vitis vinifera L., which has a very wide range of varieties, is still being studied. The aim of this study was to determine the effects of skin color and ripening time on the phytochemical compositions of grape seeds. As a plant material local grape varieties cultivated in Southeastern Anatolia (Turkey) were used. The results showed that grape skin color has an effect on vitamin K1, vitamin K2, vitamin D3, δ‑tocopherol, stigmasterol, ergosterol, myristic acid, oleic acid, trans-elaidic acid, and the monounsaturated fatty acid (MUFA) and saturated fatty acid (SFA) contents of seeds. The seeds of grape varieties with colored skins were richer in K2, D3, stigmasterol, oleic acid, trans-elaidic acid, and MUFAs, while the seeds of grape varieties with white skins were richer in K1, δ‑tocopherol, ergosterol, and SFAs. The ripening time of the grapes was found to have a partial effect on the fatty acid compositions of the seeds, but without any effect on linoleic acid contents. As the ripening time was delayed, there was an increase in oleic acid and MUFA contents of the seeds, while there was a decrease in SFA contents. In general, increased vitamin K1 contents of the seeds were parallel to decreases in vitamins K2, D2, and D3, as well as α‑tocopherol content and antioxidant activity. The seeds of grape varieties that have colored skins were found to have more suitable compound compositions for use in the production of functional foods that support human and animal health. In addition, it was concluded that grape berries that ripen late may be more favorable for grapeseed oil production.

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  AtıfScopus3·WoS4·OpenAlex3

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• MakaleAçık Erişim2021/r/munzur/5896
  Öküzgözü ve Boğazkere Üzüm Çeşitlerine Ait Çekirdeklerin Yağ Asit Kompozisyonu Bakımından Karşılaştırılması

  Aydın, Sevinç; Karaca Sanyürek, Nesrin; Aritürk, Necmi

  Bu çalışmada, Elazığ bölgesinde yetiştiriciliği yapılan Öküzgözü ve Boğazkere üzüm çeşitlerinin çekirdek yağlarının kalite kriterlerinin belirlenmesi, yağ miktarı ve yağ asit kompozisyonu bakımından karşılaştırılması amaçlanmıştır. Üzüm çekirdekleri doymamış yağ asitleri ve fenolik madde içerikleri bakımından oldukça zengindir. Bu özelliklerinden dolayı yemeklik yağ olarak kullanılabileceği düşünülmektedir. Çalışma, yöresel ticari olarak yetiştirilen iki kırmızı üzüm çeşidi olan Öküzgözü ve Boğazkere çekirdekleri kullanılarak gerçekleştirilmiştir. Bu iki üzüm çeşidi, genellikle şaraplık olarak kullanılmaktadır. Şarap üretiminin yan ürünü olan üzüm çekirdeklerinin değerlendirilmesine olan ilgi son zamanlarda giderek artmaktadır. Tanımlanan yağ asitlerinin miktarları üzüm çeşitlere göre değişmektedir. Yaptığımız analizler sonucunda çekirdek yağlarının yağ asidi kompozisyonu; Miristik asit (0.36±0.02), Palmitik asit (20.45±0.67) ve Palmitoleik asit (5.80±0.10) miktarları karşılaştırıldığında, Boğazkere üzümlerine ait çekirdeklerde, Öküzgözü üzümlerine ait çekirdeklerden daha yüksek oranlarda tespit edilmiştir. Stearik asit (1.15±0.03), Oleik asit (19.40±0.4), Linoleik asit (54.75±0.69), α-linoleik asit (0.07±0.02) ve Gama-linolenik asit (0.24±0.01) miktarları karşılaştırıldığında ise Öküzgözü üzümlerine ait çekirdeklerde, Boğazkere üzümlerine ait çekirdeklerden daha yüksek oranlarda tespit edilmiştir.

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  AtıfOpenAlex3·TR Dizin1

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• MakaleYalnız künye2021/r/munzur/4313
  BIOCHEMICAL COMPOSITION AND ANTIOXIDANT PROFILE OF GEOGRAFICALLY LABELED KOHNU GRAPE (Vitis vinifera L.) CULTIVAR FROM TURKEY

  Akbaba, Emel; Aydin, Sevinc; Sanyurek, Nesrin Karaca

  Vitis vinifera L. is cultivated throughout the World including Turkey which is one of the largest producers of grape. Grape is consumed as fresh or dry fruit as well as used in the wine industry in which good quality of grapes are preferred. Grape is also a part of the traditional Mediterranean diet which is linked to a low risk of cardiovascular and degenerative diseases. Kohnu is a geographically labeled type of grape cultivated in the eastern cities of Turkey. In this study, Kohnu grapes harvested from two different cities of Turkey were compared through phenolic compounds, phytosterols, vitamins, fatty acids, and antioxidative properties. The concentrations of phenolic compounds in the sample from Elazig were obtained to be significantly higher as compared to the sample from Malatya. Especially vanillic acid was found to be much higher in Elazig samples. The concentrations of fatty acids especially palmitic acid, palmitoleic acid, oleic acid, and linoleic acid were obtained significantly higher in Elazig samples as compared to Malatya samples. Vitamin and phytosterol concentrations of the samples from Elazig were also determined as higher as compared to Malatya samples. Significantly higher antioxidant activity of Kohnu grape seeds from Elazig was obtained via DPPH radical scavenging activity and MDA levels. The antioxidant profile of Kohnu grape seeds of Elazig samples could be related to phenolic composition and vitamins.

  AtıfWoS4

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