Fikret Yasar

• Prof.Dr.
• Professor at Van Yuzuncu Yil University

Azospirillum lipoferum (AzL) ve deniz yosunu (DY) uygulamalarının karpuz fidelerinin büyüme parametreleri ve klorofil içeriği üzerindeki etkilerini incelemek amacıyla yürütülen bu çalışma, Türkiye'deki sürdürülebilir fidecilik uygulamalarına katkı sağlamayı hedeflemiştir. Araştırma, Van Yüzüncü Yıl Üniversitesi, Ziraat Fakültesi’nde kontrollü çevre...

Amaç: Bu çalışma, farklı dozlarda kalsiyum (Ca) ve silisyum (Si) elementi uygulamalarının domates fidesi gelişimi ve besin elementi alımı üzerindeki etkilerini belirlemeyi amaçlamıştır. Materyal ve Yöntem: Çalışmada Falcon çeşidine ait domates tohumları kullanılmıştır. 3:1 oranında hazırlanan torf + perlit karışımı fide yetiştirme ortamı olarak viy...

Çalışma, Azospirillum lipoferum (AzL) ve deniz yosunu özütünün (DY), sakız kabağı (Cucurbita pepo L.) fidelerinde büyüme ve gelişim parametrelerine etkilerini incelemek amacıyla yürütülmüştür. Deneme kontrollü iklim koşullarında gerçekleştirilmiş ve biyostimülantlar üç farklı dozda (1,25 ml/L, 2,5 ml/L, 5 ml/L) tek başına ve kombinasyon halinde uyg...

Amaç: Tuz stresi, tarımsal üretimin önemli bir sınırlayıcı faktörü olup, bitkisel üretimin verim ve kalitesini olumsuz etkilemektedir. Tuz stresinin olumsuz etkileri ile mücadele etmek amacıyla, alternatif yöntemlerin araştırılması ve geliştirilmesi, sürdürülebilir bitkisel üretim stratejilerinin önemli bir parçası haline gelmiştir. Van Yüzüncü Yıl...

z: Yürütülen çalışmada Crimson Sweet (Citrillus lanatus Thunb.) karpuz çeşidi kullanılmıştır. 3 farklı organik materyal (vermikompost, gidya, leonardit) ve bunların farklı dozları (% 3, % 6, % 9) ile bahçe toprağının kullanıldığı kontrol grubunun, karpuzda iyon alımına etkisi incelenmiştir. Karpuz fideleri, her biri 3 kilogramlık hacme sahip olan s...

In the study, oxidative stress statuses and antioxidant enzyme activities caused by light were determined by applying two different light intensities to tomato plants under controlled conditions. The indeterminate type Adamset F1 hybrid tomato (Solanum lycopersicum) cultivar was used. It was grown in Hoagland nutrient solution in a controlled clima...

This study aimed to determine chill resistance and to explain how chilling stress affects metabolic processes by applying different doses of melatonin to Beith F1 hybrid cucumber (Cucumis sativus L.). In addition, experiments were conducted to understand the response of plants with and without melatonin to chilling stress and their adaptation mecha...

Bu çalışmasında, farklı besin solüsyonlarının domates fidesi yetiştiriciliğinde uygulayarak, domates fidelerinin büyüme parametrelerine bakılmıştır. Çalışma torf + perlit karışımında yetiştirilen Bandita F1 hibrit domates çeşidi bitkilerine uygulanan farklı besin eriyiği reçetelerinin uygulamaları sonucunda oluşan fidelerde en iyi, kaliteli ve en p...

The purpose of the study was to determine the relationship between the messenger molecule Nitric oxide (NO) and antioxidative enzyme (SOD: Superoxide Dismutase; CAT: Catalase; APX: Ascorbate Peroxidase) activities in some metabolic changes that occur under the effect of drought stress in plants, to determine the possible roles of Nitric Oxide and t...

Beith F1 hıyar çeşidinin kullanıldığı araştırmada; üşümenin ve yapraktan uygulanan melatoninin fidelerin bazı morfolojik karakterleri üzerine etkileri araştırılmaya çalışılmıştır. 3-4 gerçek yapraklı iken üşüme uygulanan fidelere 0, 1, 10, 20, 30 ve 40 μM melatonin içeren saf (distile) su bitkilerin yapraklarına püskürtülmüştür. Melatonin uygulamas...

Caipira (Lactuca sativa var. Crispa) kıvırcık yaprak salata çeşidinin kullanıldığı çalışma, 3 farklı organik materyal (vermikompost, gidya, leonardit) ve bunların farklı dozları (% 3, % 6, % 9) ile bahçe toprağı kullanılan kontrol grubu (% 0) olarak tasarlanmıştır. Bu çalışmada, insan beslenmesinde önemli yer tutan ve kimyasal azotlu gübreler uygul...

Yapılan bu çalışmada; geçici tuz stresi döneminde ve sonrasında Çarliston (Capsicum annuum L./ tatlı) ve Acı çiçek (Capsicum frutescens L. /acı) biber bitkisindeki metabolik olayların nasıl etkilendiğini açıklığa kavuşturmak, bitkilerin geçici stres dönemi ve sonrasında mikro element alımında oluşan değişikliklerin nasıl olduğunu belirlemek amaçlan...

Demre sivri biber çeşidinin kullanıldığı çalışmada, tuz stresi altındaki biber bitkisine farklı dozlarda uygulanan kalsiyumun (Ca) bitki gelişimi ve antioksidant enzim aktiviteleri üzerine etkileri araştırılmıştır. Çalışma kontrollü şartlardaki 16/8 saatlik aydınlık/ karanlık fotoperiyotta, 25 oC de ve %70 nemli iklim odasında yürütülmüştür. Çalışm...

This project was developed to investigate the contribution of salicylic acid (SA) to the development of pepper seedlings grown in low temperature (0 0C) conditions. The research was carried out in the controlled plant growing cabinet in the research- investigation area of the Department of Horticulture, Faculty of Agriculture, Siirt University. As...

The present study was carried out in a climate chamber and water culture of physiology laboratory of Van Yüzüncü Yıl University, Faculty of Agriculture, Department of Horticulture. Demre pepper varieties are used in the study of different levels of calcium (Ca) morphological and biochemical effects of pepper plants under salt stress were investigat...

PhD thesis

This study was carried out in order to determine whether the element of potassium would be effective in the intake of micronutrients of the papper plants under salt stress. In the study, Demre long pepper type was used as material. The study was carried out in 16/8 hour light / dark photoperiod, 25 0C and 70% humid climate room in controlled condit...

In order to determine the relationships between salt tolerance, seed and seedling characteristics, 16 watermelon genotypes collected from various regions of Turkey, and 3 standard and 2 F1 hybrid varieties were used as material in the study. The seedlings were grown in Hoaglands nutrient solution in aqua culture in an atmospheric controlled climati...

Uzal ‒ Yasar: Effects of GA3 hormone treatments on ion uptake and growth of pepper plants under cadmium stress-1347-APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH 15(4):1347-1357. Abstract. The present study was conducted to identify the response of pepper plants under cadmium stress to gibberellic acid (GA 3) treatments. Plants were exposed to differe...

Experiments were conducted with Demre long pepper cultivar in a climate chamber with controlled climate parameters and in a hydroponic system with Hoagland nutrient solution. Three-week old seedlings were subjected to 100 mM NaCl treatments and samples were taken on 10 th day of the treatments for physiological and biochemical analyses. With the id...

Van province, natural and historical values has a very rich identity. It is also one of the important cultural centers of the Eastern Anatolia region. Due to the challenging climatic conditions and distance from many production centers, it has a very limited variety in terms of species that can be used in landscape design. In addition, the lack of...

The aim of this study is to determine the developmental performance of the 18 bean genotypes belonging to Phaseolus vulgaris L. belonging to Anatolia's many components, chilling according to the organs below. Fidelites of ten different bean genotypes were cultured in the growth chamber under controlled climatic conditions and in the vessels contain...

Van province, natural and historical values has a very rich identity. It is also one of the important cultural centers of the Eastern Anatolia region. Due to the challenging climatic conditions and distance from many production centers, it has a very limited variety in terms of species that can be used in landscape design. In addition, the lack of...

The aim of this study is to determine the developmental performance of the 18 bean genotypes belonging to Phaseolus vulgaris L. belonging to Anatolia's many components, chilling according to the organs below. Fidelites of ten different bean genotypes were cultured in the growth chamber under controlled climatic conditions and in the vessels contain...

Heat shock treatments are widely used to induce microspore embryogenesis in Brassica species. In this study, the effect of high temperature treatment (32 °C and 35 °C for 2 days) on microspore embryogenesis was investigated in six genotypes of Turkish white head cabbage (Yalova-1, Ercis, 177 C, 177 T, 531 C, 538 C), three genotypes of Turkish kale...

Under field conditions, growth parametres like fresh weight and leaf number, superoxide dismutase (SOD), catalase (CAT), ascorbic peroxidase (APX) enzymes in the antioxidant defence sytems are analysed on 12 lines and two cultivars of pea seedlings which are specified as tolerant against cold. Besides the relationship between the protection mechani...

Seeds from Black Aydın eggplant varieties, in hydrponic system within Hoagland nourishment solutions, grown up in plant development under control climatic features room. Three weeks seedlings was carried out graded 100 mM NaCl and studied alteration physiologic and biochemical for 15 days salt stress plants. In the investigation, foresight of salt...

The students of associate degree programs in vocational schools spend most of their days in the vocational school in accordance with their academic programs. One of the important part of the vocational school is the spaces within the school and in the garden of school which must be designed in a way that it can contribute to their training properly...

This study examined the responses to salt stress of 5 pea genotypes, B-6, 110121, 1103220, 101917 and 10431 and two pea cultivars Winner and Karina under 75 mM NaCl salt treatment. Pea genotypes were selected from among cross-breed varieties of wild pea and white flowered pea growing different regions of Anatolia. While salinity reduced significant...

Abstract: Medicinal and aromatic plants, which are consumed as a dried or fresh tarragon plant (Artemisia dracunculus L.) through tissue culture propagation were studied. The tissue culture study on tarragon, explant type most suitable for in vitro propagation, carbonhydrate source, and sub-culture tried to determine the number. In this study, the...

The objective of this investigation was to determine the relationship between drought stress and the ion accumulation as well as distribution mechanisms of bean genotypes of the Phaseolus vulgaris L. species, namely, Gevas Bodur 64 (GB64), Samsun 100 (S100), Samsun 95 (S95), 4F-89F, Gevas Sink 57 (GS57), Gevas Sink 26 (GS26), Samsun 96 (S96), Sink...

The aim of this study is to investigate the relationship between the drought tolerance capacity and antioxidant enzyme activity of 38 genotypes of different pumpkin species from different regions of Turkey. The seedlings from 38 different genotypes were put into pots containing Hoagland's solution to be stored in cultivation rooms under controlled...

In many areas of the world, soil salinization is an important concern for the sustainability of irrigated agriculture and accounts for large decreases in the yield of a wide variety of crops. Numerous attempts have been employed to optimize plant growth under saline conditions. One of them is to produce salt tolerant genotypes in different crops by...

When plants are subjected to environmental stresses such as temperature extremes, drought, salinity or heavy metal toxicity, they produce reactive oxygen species ROS causing oxidative damage. Plants with high levels of antioxidants, either constitutive or induced, have been reported to have greater resistance to the oxidative damage. In our previ...

To investigate the antioxidant defense system, salt stress induced changes in antioxidant enzymes activities were examined in the callus of salttolerant (Diyarbaki{dotless}r and Midyat local genotype), and salt-sensitive (Golden Crown F1 and Crimson Sweet) watermelon (Citrullus lanatus) varieties. On the 6th and 12th days of salt stress, the callus...

A smoke-derived butenolide, 3-methyl-2H-furo[2,3-c]pyran-2-one, has previously been shown to improve seedling vigour of various crop species. The aim of this study was to examine the effect of butenolide priming treatments on seedling emergence and growth when it is applied to peat moss in which seeds are sown (post-sowing) rather than pre-sowing i...

The response of the antioxidant system to salt stress was studied in the leaves and callus tissues of 4 Turkish melon varieties (Cucumis melo L.) Besni, Yuva, Midyat, and Semame and a melon cultivar Galia C8. The antioxidant capability of the plants was determined by measuring superoxide dismutase (SOD) and catalase (CAT) activities. On the 8 th da...

Local melon populations growing on the side part of the Salt Lake present an important potential of gene source in terms of breeding programs. The aim of this work is investigation of salt tolerance status of that melon populations and examine the distribution of Na+, Cl-, K+, Ca+2 ions in the plant. As the plant material, nine melon (Cucumis melo...

Salinity is a major abiotic stress reducing the yield of a wide variety of crops all over the world. In order to investigate the antioxidant enzymes activity of four pumpkin genotypes (Iskenderun-4, AB-44, CU-7 and A-24) in response to salinity grown in hydroponic culture, 4 to 5 true leaf stages of pumpkin seedlings were subjected to 100 mM NaCl f...

In the present research, a total 28 bean cultivars grown in Turkey were characterized by the numerical analysis of seed protein profiles obtained by using sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS-PAGE) technique. The numerical analysis of seed protein profiles generated two major clusters at similarity levels of 82.52% or abo...

One of the environmental stresses, and maybe one of these important drought stresses, cause deterioration of oxidative on the plant cell. Beans is one of the vegetables influenced by high level of drought. Drought stress deterioration effects on beans and its aim determines these effects either as been different or not caused by drought stress depe...

A smoke-derived butenolide, 3-methyl-2H-furo[2,3-c]pyran-2-one, has previously been shown to improve seedling vigour. The aim of this study is to examine the effect of hydropriming and butenolide priming treatments on seedling emergence and growth under different sowing depths at 20 and 25 degrees C in two melon (Cucumis melo L.) seed lots of high...

This research was conducted to investigate the effects of priming (controlled hydration at 25°C for 48 h) on germination at stressful temperatures (low 15°C and high 35°C), sugar content, total oil, fatty acid composition and enzymatic activities of pepper (Capsicum annuum L.) seeds in two consecutive runs. The experiments were conducted on pepper...

Green bean genotypes collected from eastern Turkey were characterized using simple sequence repeat (SSR) markers and morphological traits. Among 12 SSR markers, 10 produced successful amplifications and revealed DNA polymorphisms that were subsequently used to assess genetic relatedness of the genotypes. Based on the number of alleles generated and...

Soil salinity is a major limitation to crop production in many areas of the world. A pot experiment was carried out with soybèan cultivars to investigate the effects of salinity stress on plants growth and nutrient composition at 150 mM NaCl concentration under greenhouse conditions. Twelve soybean cultivars were exposed to salinity treatments (0 a...

Salt stress-induced changes in antioxidant enzymes, such as catalase (CAT), ascorbate peroxidase (APX), and glutathione reductase (GR), total chlorophyll content, and lipid peroxidation measured as malondialdehyde (MDA) content, in leaves of a green bean genotype Gevas sirsk 57 (GS57) and cv. Fransiz 4F-89 differing in salt tolerance were investiga...

This study was carried out to determine the effects of salt stress on the growth, dry weights and micronutrient contents of soybean cultivars grown in green house conditions. Twelve soybean cultivars (Omaha and Cisne) were exposed to salinity treatments (150 mM NaCl and Control). Shoot, leaf and root dry weights of all cultivars at 45-day-old plant...

This study examined the responses to salt stress in 11 pea genotypes and two pea cultivars. Pea genotypes were selected from among wild pea and white flowered pea cross-breed varieties from different regions in Anatolia. In general, root fresh weight (fw) shoot fw, leaf fw, leaf number and chlorophyll contents were found to decrease with increases...

The present study aimed to investigate the effect of different days (0, 7 and 15th days) and salt applications (salty and saltness) on nutrient element compositions of root, shoot and leaf organs of 11 field pea genotypes (which are nominate pea) and 2 pea cultivars. For this aim, the data were analyzed using three-way-ANOVA (genotypes, salt applic...

Morphological traits of the plants may depend on several biochemical traits. Thus, the determination of the relationships between morphological and biochemical traits of the plants may be important for plant scientists. The relationships between morphological (SL; Shoot length, RL; Root length, SW; Shoot weight, RW; Root weight and LW; Leaf weight)...

The response of 13 green bean genotypes used in this study to salt stress was found differently. Taking into consideration of all genotypes, generally, the genotypes showing better growth under salt stress had lower Na, higher K and Ca contents. Of green bean genotypes used this study; Ca contents of genotypes having higher fresh weight was found h...

In order to determine the genotypical differences and basic selection parameters for salt tolerance 36 melon genotypes were grown in hydroponics culture. When seedlings reached to 4-5 leaf stages 150 mM NaCl was applied to them. 14 days after salt application, young plants were harvested from control and salt treated groups. The fresh weight of gre...

The aim of this research is to identify differences in salt tolerance of melon genotypes and the possibility of using plant biomass values and degree of ion accumulation of leaves to determine salt tolerance. In addition, the increase in MDA amount of leaves on salt stress was evaluated. 36 different genotypes were identified according to different...

Salt-tolerant Gevas Sirik 57 (GS57) genotypes and salt-sensitive 4F-89 French variety, previously determined in our preliminary study, were used in the study. The genotype and the variety exposed to 100mM NaCl application developed different mechanisms to be protected against toxic effects of Na + ion. Salt-sensitive 4F-89 French variety let Na + a...

The objective of present study was to determine difference in ion and MDA (malondialdehyde) content of tolerant and sensitive genotypes calluses grown under salinity condition. For this purpose, two tolerant and two sensitive local Turkish aubergine cultivars were used. After 8 days of being cultured, callus growth of all genotypes showed a decreas...

SUMMARY The response of the antioxidant system to salt stress was studied in leaves of seedlings of four Turkish melon (Cucumis melo L.) varieties 'Besni', 'Yuva', 'Midyat' and 'Semame' and three melon cultivars 'Ananas', 'Galia C8' and 'Galia F1'. The anti-oxidant capability of plants was determined by measuring ascorbate peroxidase (APX) and glut...

The objective of present study was to determine difference in ion and MDA (malondialdehyde) content of tolerant and sensitive genotypes calluses grown under salinity condition. For this purpose, two tolerant and two sensitive local Turkish aubergine cultivars were used. After 8 days of being cultured, callus growth of all genotypes showed a decreas...

To determine whether there is a difference on the historical and clinical characteristics of omphalitis among term and preterm appropriate for gestational age (AGA) and small for gestational age (SGA) infants, we prospectively investigated 85 newborns with bacteriologically proved omphalitis. Study groups were based on gestational age and being SGA...

All of cabbage gardens were inclueded for selection that this study was conducted in local cabbage population province of Erciş-Van. Examples were taken from gardens which have cabbages that high ratioof heading and heading efficiency; good homogeneous in line, unappeared crack and undiseases. The highest head efficiency was determined 86.6 %. Numb...