Nurhan Keskin

Van Yuzuncu Yil University · Horticulture

In the context of global efforts to improve food quality against the backdrop of climate change and increasing demands for food, this study sought to investigate the influence of tillage and fertilization methods on essential nutritional components. Thus, this extensive investigation into the variability of organic acid, sugar, and vitamin content...

Understanding the complex interplay between environmental factors and grape quality is crucial for the viticulture industry, as it directly influences wine quality and the distinctiveness of products. This significance underpinned our comprehensive study, which aimed to dissect the relationships between ‘terroir’, including the altitude, regional c...

Unraveling the intricate physiological and biochemical intricacies associated with female dominance in grape berries across diverse developmental stages is imperative for optimizing grape production and ensuring the attainment of high-quality yields. This study conducted a thorough analysis of grape berries across phenological stages (BBCH-79, BBCH...

Understanding the impact of pre-treatment methods on the phytochemical composition of grapes is essential for optimizing grape quality and producing raisins with desirable characteristics. Therefore, this study meticulously analyzed the impact of two distinct pre-treatment methods, oak ash and potassium carbonate (K 2 CO 3), on the composition of e...

Muscari neglectum is a widespread plant species that grows in various areas of the Mediterranean region in the wild. The species has a high potential for use as cut flowers, outdoor or indoor ornamental or garden plants. It is also used as a food, and forage plant on limited scales in rural areas. There is a lack of commercial production protocols...

İnsanlık tarihinde medeniyetlerin yükselişine yol açan en büyük gelişmelerden biri olan tarım, ekosistemlerle uyumlu bir şekilde sürdürülebilirliği sağlamak adına önemli bir dönüşüm geçirmektedir. Gıdadan tekstile birçok endüstriyel ürün için hammadde sağlayan tarımda yaşanan önemli bilimsel ve teknolojik ilerlemelerin sağlamış olduğu verim artışı...

Raisins are known as an important source of many bioactive compounds such as organic acids, free amino acids, and sugars. In this study, oak ash and potassium carbonate solutions applied before drying were compared for their effects on the Gök Üzüm raisin, more specifically, its contents of organic acids, free amino acids, and sugar profile. The to...

Z Günümüzün en önemli turizm konularından biri olan sürdürülebilir bağ ve şarap turizmi, bu alanda çeşitli sürdürülebilirlik ilkelerinin benimsenmesi ve uygulanması ile gerçekleştirilmektedir. Sürdürülebilirlik uygulamaları ile bağ ve şarap turizmi, bölgedeki çevre bilincinin, toplum değerlerinin ve iş performansının geliştirilmesi için önemli bölg...

In this study, phenological stages and effective heat summation (EHS) requirements of ten grape cultivars (Banazkara, Köhnü, Kureyş, Tahannebi, Öküzgözü, Ağın Beyazı, Barış, Hatun Parmağı, Italia, and Horoz Karası) grown in Apricot Research Institute Battalgazi Campus Collection Vineyard in Malatya which is one of the important wine growing provinc...

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...

Bu çalışma ile Dünya’da şarap turizmine yönelik yapılmış araştırmaların eğilimleri bibliyometrik olarak incelenmiştir. Bu amaçla, 1995-2023 yılları arasında yapılmış şarap turizmi çalışmaları “wine tourism” anahtar kelimeleri kullanılarak Web of Science (WOS) ve Scopus veri tabanlarında taranmıştır. Tarama sonucunda 1664 çalışmaya ulaşılmıştır. Ver...

Bu kitabın amacı küresel düzeyde olmaktır. Ekvatora yakın tropik bağcılığın fizyolojik özelliklerinden buz şarabına ve ılıman enlem sınırlarında üzüm üretimine değişen aralıkta yer alan konuları ele almaktadır. Deniz seviyesindeki bağlardan yüksek rakım bağlarına değişmektedir. Serin deniz iklimlerinin nemli koşulları ile Akdeniz iklimlerinin nemli...

PREFACE In an ever-changing world of agriculture, it is not a surprise to see the advent of new information or technologies in the field of horticulture. The more the population of the world is on the rise every year, the more the producers are under pressure to increase yield. However, producing more vegetable and fruit is a challenge as more land...

In recent years, studies have shown that seaweed applications could prevent post-harvest berry drops in grapes and allow improvements in cluster and berry quality characteristics. This study was conducted on 'Tarsus Beyazı' grape cultivar, which was grown on its own root and goblet-trained, in the Tarsus district of Mersin Province, Turkey. Althoug...

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' pomegranat...

(1) Background: Italia is a variety widely cultivated in Aegean Region in Turkey, whereas Bronx Seedless is a variety preferred by consumers due to its pink berries and interesting flavor. The goal was to study volatile compounds of these table grapes throughout berry ripeness. (2) Methods: The volatile compounds were analyzed by GC-MS in six diffe...

In clonal grapevine populations, genetic factors may have a significant effect on the amount of phenolic compounds in the grape berries. Thus, the capacity of the clones to produce distinctive chromatic profiles can be improved. This paper describes the phenolic contents and composition of grape berries as well as relationships among them for Kalec...

Some biogenic amines (BAs) may be used as quality markers in grape derived products and they have key roles in human nutrition. In this study, therefore, two traditional dipping solutions, namely oak ash and potassium carbonate solutions applied before drying, were compared for their effects on the BA profile of Gök Üzüm raisins. The mean agmatine,...

(1) Background: Raisins contain a wide range of hormones, minerals, vitamins, and antioxidant enzymes that may contribute to the health benefits of consumers. (2) Methods: The aim of this research was to compare the hormone, mineral, vitamin, and antioxidant capacities of Gök Üzüm (Vitis vinifera L.) raisins immersed in oak ash (OA) and potassium c...

Arbuscular mycorrhizal fungi (AMF) establish beneficial symbiotic associations with plants, enhancing their nutrient uptake, growth, and stress tolerance. The present study was aimed to investigate AMF spore density, species composition, mycorrhizal colonization patterns, and correlation of these indices with soil physicochemical parameters at four...

It is seen that research subjects are shaped especially under the effect of climate change and that practices that will minimize possible negative effects are examined. Precision viticulture (modeling with data and image processing) processes for technical and biochemical analysis without damaging the product are gaining momentum. With the effect o...

Van province, one of the best examples of the high altitude region in terms of viticulture ecology due to its geographical location, has an altitude of 1725 m. Since high altitude affects climatic factors such as temperature, humidity, precipitation, UV radiation, and wind, it is important for the suitability of the vineyard. The increase in altitu...

Mineral elements are the building blocks of growth and development for plants as well as for all living organisms. They are essential for plant life and are generally classified as macro (nitrogen, phosphorus, potassium, calcium, magnesium, and sulfur), micro (iron, zinc, manganese, copper, and boron), and trace minerals (molybdenum, selenium, nick...

The antioxidant activity and phenolic compounds content of pomace from the berries of ‘Isabella’ and ‘Katıkara’ grape varieties widely produced in the Eastern Black Sea region of Turkey were researched for use as a potential natural antioxidant source. The results of this study indicated that there were statistically significant differences (p < 0....

Organic acids develop flavor, aroma and color in berries and wine of grapes as well as play important role in microbiological and biochemical stability of the wine. ‘Kalecik Karası’ cultivar is one of the exclusive red grape varieties of Turkey. The aim of this study is to evaluate and visualize the differences among the 23 clones of ‘Kalecik Karas...

In this study, the effect of Ultraviolet (UV) irradiation on induction of individual and total phenolics production on callus cultures of 'Karaerik' grape cultivar was investigated. Callus tissues were obtained from the leaves of the cuttings grown in in vitro plants. As a culture medium, Gamborg B-5 was utilized with 0.1 mg L-1 NAA (Naphthaleneace...

Bu çalışma, stoma yoğunluğu ve boyutları üzerine çeşidin, kullanılan yöntemlerin (kalıp alma/saydamlaştırma), yaprakların alınma konumlarının (gölge/güneş) ve yaprak yüzeyinin farklı bölgelerinden örnek almanın (uç, orta, dip) etkilerini ortaya koymak ve çeşitlerin toplam klorofil, klorofil a, klorofil b, karotenoid miktarları ile SPAD değerlerini...

Aim of this study was to determine phenolic compound and organic acid contents of 17 local grape varieties grown in Hizan (Bitlis) province of Turkey. Organic acid and phenolic compound amounts were determined via HPLC (High Performance Liquid Chromatography). Organic acids amount of grape varieties ranged from 1362.06 µg g-¹ (Sapı Beyaz) to 4269.9...

In this study, trans-resveratrol (t-RSV; 3,5,4′-trihydroxy-trans-stilbene) contents of the ripened berries of 23 clones of ‘Kalecik Karası’ which is one of Turkey’s leading red wine grape cultivars, grown in Ankara (Kalecik) were determined by HPLC. For this purpose; the berries were collected at 22–24 °Brix during 2016–2017 vintage seasons. Descri...

In this study, the effect of ultraviolet (UV) irradiation on the induction of anthocyanin production in callus cultures of 'Karaerik' grape cultivar was investigated. The most appropriate callus tissues were obtained from the leaves of the cuttings grown in in vitro plants. Gamborg B-5 medium containing 3 combinations of NAA (naphthalene acetic aci...

Indolaminler olarak bilinen melatonin (MEL; N-asetil-5- metoksitriptamin) ve serotonin (SER, 5HT; 5-hidroksitriptamin) dünyada milyonlarca yıl önce prokaryotların yaşam döngüsünde yer aldığı varsayılan antik kimyasallardır. Bu bileşikler, memelilerde varolduğu ortaya konulduktan birkaç yıl sonra bitkilerde de keşfedilmiş ve hemen hemen bütün bitki...

This research was carried out on local apple varieties (Malus domestica Borkh.) that are grown in Şirvan, Pervari, Eruh districts and their villages in Siirt province. Fruit samples were taken between 2014-2015 from 21 different trees that are qualified, have high value in the market and preferred by local people. Phenological observations were rec...

Gülüzümü is a grape cultivar used for fresh consumption. In addition to table grape characteristics, it is also used for traditional must products thanks to its berry skin color and flavor properties. This variety, which is one of the important genetic resources of Ankara province, come into prominence with its attractive “pink” skin color and uniq...

Bitkilerde fotosentez, transpirasyon, solunum gibi birçok hayati mekanizmayı kontrol eden yapraklar, bilimsel çalışmalarda tür ya da çeşit tespitinin yapıldığı, bitkinin çeşitli stres şartlarına olan tepkisinin ölçüldüğü temel organlardır. Yaprakların yüzey alanının tespiti de birçok çalışmaya ışık tutmaktadır. Bu çalışmada yaprak alanını belirleme...

L.) dünyanın en eski ve ilk kültür bitkilerinden birisidir. Avrupa kıtasına özgü olan bu tür, insanlık tarihi ile birlikte kıtalar arasında yayılmış ve yeni coğrafyalarda asma ailesine (s ssp.) ait farklı elirlenmesi ile bağcılık kültürü zenginleşmiştir. Asmanın meyvesi olan üzüm, sofralık, kurutmalık, şaraplık ve şıralık olarak değerlendirilmekted...

Determination of the leaf area has great importance in terms of plant development due to giving significant information about photosynthetic capacity of the plants. Leaf area measurements also reveal significant information about growth potential. Nowadays it can be done in laboratory and with portable expensive devices. The primary objective of th...

Erciş Üzümü is a local grapevine cultivar that has an agricultural and cultural value for the civilizations that have dominated Van and its environs, and today it is subject to many scientific studies both in natural and social sciences. Beside molecular and ampelographic description of the cultivar, clone selection studies have also been brought t...

Viticulture preserved its significance from the past to the present that have been ruled in all civilization the region of Van. The presence of carbonized grape seeds in the remains of the Early Iron Age tombs and cities gives information about the history of grape cultivation in Van and its vicinities. However, many of the local varieties describe...

Environment damage has brought about the elimination of many plant species, and numerous more are endangered. Similarly, ornamental and en-demic Centaurea fenzlii Reichardt that grows in Turkey is threatened that necessities measures for its immediate conservation. In vitro culture techniques are widely used to conserve uncommon, threatened plants....

ÖZET Erciş üzüm çeşidi, Van ve çevresinde hüküm sürmüş medeniyetler için tarımsal ve kültürel bir değer taşımış, günümüzde de gerek fen bilimleri gerekse sosyal bilimler alanlarında birçok bilimsel çalışmaya konu olmuş bir çeşittir. Moleküler ve ampelografik tanımlaması yapılmış olan çeşidin, klon seleksiyonu çalışmaları da, belli bir aşamaya getir...

Viticulture can be performed in a limited area in Van due to the restrictive effect of the temperature. “Erciş” cultivar is unique grape variety that adapts to ecological conditions of Van and continues to its popularity from the Urartu civilization to nowadays. This study aims to determine nutrients content in one-year old canes that pruned in win...

Bağcılık dünya üzerinde 30-50° kuzey ve güney enlemleri arasındaki ılıman iklim kuşağında ekonomik değer taşıyan önemli bir tarımsal faaliyettir. Bu kuşakta asmaların büyüme ve gelişmesi üzerinde etkili iklim faktörleri bulunmakla birlikte, en etkili iklim ögesi sıcaklıktır. Bağcılıkta sıcaklık ile asmanın büyümesi ve üzümün olgunlaşmasını açıklama...

Phytochemicals are chemical compounds which found naturally and active biologically in plants. These compounds are responsible for the color, aroma and taste of the plant, as well as their natural defense system in plants. It is estimated that more than 8000 phytochemicals have been identificated until now. Described thousands of phytochemicals are...

Carotenoids are play an important role to protect directly negative effects of the aridness as well as indirect role in photosynthesis. Recently, the studies about determination of Carotenoids amount in leaves has been popular to early selection criteria for determination of resistance to drought. In this study, carotenoids amount which determined...

This study aims to determine amount of stilbenes production in berry (skin, fesh, seed), and one-year-old cane of grapevine (Vitis vinifera L. cv. 'Ercis') as well as induced leaves and berries. The samples were obtained from potted grapevines grown in controlled conditions. Piceid, trans-resveratrol, ϵ-viniferin, piceatannol, and pterostilbene wer...

This study was conducted to determine quality and phytochemical characteristics of 'Ercis' cultivar that is indigenous to Van province for wine and must as well as table grapes due to specific aroma. In this framework, physical (color, cluster weight (g), berry length (mm), berry width (mm) and berry weight (g)), chemical (pH, titratable acidity (T...

z Stomalar, açılıp kapanma özellikleri ile bitkideki terlemeyi ve gaz değişimini kontrol eden canlı yapılardır. Çoğunlukla yaprakların alt yüzeyinde (hipostomatik) bulunabildikleri gibi bazen üst yüzeyinde (epistomatik) bazen de her iki yüzeyinde (amfistomatik) bulunabilir. Kültür bitkilerinde çeşitlere ve yetişme koşullarına göre bitki-su dengesin...

Bitki hücreleri kullanılarak bitkilerin büyüme ve gelişme olaylarının morfolojik, fizyolojik ve biyokimyasal yöntemlerle incelenmesi hücre kültürleri ile başlamış, hücre süspansiyon kültürü ve biyoreaktörlerin kullanıldığı farklı ölçeklerdeki üretim sistemlerine ulaşan gelişmeler elde edilmiştir. Asma ve besin kaynakları olan ürünleri üzüm, şarap v...

The total phenolic and vitamin C contents of organic table grapes were determined by spectrophotometry and HPLC, respectively, after several quality-increasing treatments were applied at veraison for two growing seasons. Cane girdling and cluster-berry thinning resulted in different responses in the cultivars. 'Red Globe' generally was found to pro...

Bitki hücreleri kullanılarak bitkilerin büyüme ve gelişme olaylarının morfolojik, fizyolojik ve biyokimyasal yöntemlerle incelenmesi hücre kültürleri ile başlamış, hücre süspansiyon kültürü ve biyoreaktörlerin kullanıldığı farklı ölçeklerdeki üretim sistemlerine ulaşan gelişmeler elde edilmiştir. Asma ve besin kaynakları olan ürünleri üzüm, şarap v...

In this study, mineral composition and distribution in berry parts of Gülüzümü, which important grape cultivar of Ankara (Beypazarı), were determined. Mineral analysis was performed using ICP-MS (Inductively Coupled Mass Spectrometry) in seed, pulp and skin. 30 minerals were examined, 5 macro minerals, 5 micro minerals and 14 trace minerals were de...

Mardin province is an historical and significant grape growing region with local varieties in Turkey’s viticulture. In this study 12 grape varieties were determined as economically important source of germplasm in the village Mardin-Elmabahçe (Tizyan). Totally 40 OIV criteria were taken into consideration for ampelographic characterization. Ampelog...

Besides the physical properties, the chemical characteristics of table grape cultivars, particularly in terms of the potential of phenolic compounds, have gained importance as quality criteria. In this study, phytochemical quality characteristics of Gülüzümü which grown in Ankara and come into prominence with its “pink” skin color within our geneti...

In this study total phenolic and vitamin C contents of the fully ripe berries of 23 clones of Kalecik Karasi which is one of the leading Turkish local red-wine grape cultivar originally grown in Kizilirmak valley near Kalecik/Ankara region were examined under the clone selection project supported by TÜBİTAK (Project Nr: 107 O 731). High-pressure li...

ABSTRACT: Grape berries are highly complex and multi-way biochemical units. During development and maturation period, they undergo consecutive modifications in terms of size, composition, color, texture, flavor and aroma. By intake water, sugars, organic acids, vitamins and minerals, grape berries accumulate these and synthesize phenolic compounds...

The response of berry organic acids of four organically grown table grape cultivars to cane-girdling and cluster-berry thinning treatments were evaluated over two growing seasons. In addition pH, titratable acidity, soluble solids content and maturity index were also determined. Statistical analyses showed that individual organic acid content of th...

Some quality characteristics of berries i.e., total sugar, titrable acidity, pH and soluble solid were determined for 23 clones of Vitis vinifera L. cv. Kalecik Karasi. Significant differences (p<0.05) were recorded for the quality characteristics among clones. Glucose and fructose content ranged from 120.59 to 136.45 and 112.505 to 123.185 g L -1,...

This study was conducted in order to identify some physical and chemical characteristics of fruits and seeds in the genotypes of Gilaburu (Viburnum opulus L.) naturally grown in Erzincan region. In the study measurements were conducted regarding the weight, height, width, total soluble solid (TSS) content, pH, and titratable acidity (TA) content of...

In this study, the effects of ultraviolet (UV) irradiation time, incubation time and callus age were investigated for trans-resveratrol induction in callus cultures of Vitis vinifera L. cv. Okuzgozu. Callus tissues were exposed to 254 nm UV light at 10 cm distance from the source for 10 and 15 minutes by opening covers of the petri dishes in a ster...

Resveratrol (3, 4′, 5-trihydroxy-stilbene) is a phytoalexin of the stilbene group and is synthezed by grapevine species against biotic and abiotic stress conditions. Especially, it is synthezed in high concentrations in the shell of colored grape cultivars (0.30-0.14 mg/g fw; 9.30-78.50 mg/g dwt). After the discovery of its biochemical structure, r...

In this study, the effects of callus age, ultraviolet (UV) irradiation and incubation time were investigated for the induction of trans-resveratrol production in callus cultures of Kalecik karasi{dotless} (Clone 12) Vitis vinifera L. grape cultivar. Part of leaves (~1 cm2) were taken from one year old grapevines grown in greenhouse and then were cu...

In this study, the effects of ultraviolet (UV) irradiation time, incubation time and callus age were investigated for the induction of trans-resveratrol production in callus cultures of Vitis vinifera L. 'Cabernet Sauvi-gnon'. Callus tissues were exposed to 254 nm UV light at 10 cm distance from the source for 10 and 15 min by opening covers of the...