Browsing by Author "Bingol, Omer"

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Crepis Gemicii Sp Nov (Asteraceae) From East Anatolia, Turkey
(Wiley-blackwell Publishing, inc, 2011) Yildirim, Hasan; Bingol, Omer; Armagan, Metin
Crepis gemicii Hasan Yildirim, Omer Bingol & Metin Armaan (Asteraceae) is described as a new species. Diagnostic morphological characteris, full descriptions and detailed illustrations are given on the basis of the type material. Crepis gemicii is restricted to the province of Van in east Anatolia, Turkey. It is releated to and compared with C. bupleurifolia (Boiss.) Freyn & Sint., C. paludosa (L.) Moench and C. pannonica (Jacq.) C. Koch. Its' seed and pollen ultrastructure is described based on studies with SEM.
Evaluation of Mterf Gene Expressions in Response To Phytophthora Capsici Infection in Pepper (Capsicum Annuum L.) Cultivars
(Academic Press Ltd- Elsevier Science Ltd, 2024) Altintas, Serdar; Kuru, Ibrahim Selcuk; Erez, Mehmet Emre; Catkin, Sedriye; Inal, Behcet; Bingol, Omer
Despite resistance to abiotic stresses, some plant species may still show low resistance to pathogens. This biotic stress resistance can provide advantage and increase productivity in agricultural systems. However, while there is extensive research on the pathways involved in abiotic stress tolerance, the impact on the molecular mechanisms underlying pathogen resistance remains poorly understood. Among the pathogens , Phytophthora capsici , an oomycete, causes severe damage as plant pathogen, leading to blight and fruit rot in pepper and other commercially valuable crops. This study investigates the effects of Phytophthora capsici infection on highly resistant (CM334) and susceptible (Sera Demre) pepper varieties. We examined biochemical changes and gene expression across different vegetative periods (seedling, flowering, and fruiting stages). Specifically, we analyzed biochemical pathways and the mitochondrial transcription termination factor (mTERF) gene regions associated with pathogenicity. In pepper seedlings infected with P. capsici , peroxide levels increased at all developmental stages compared to control groups. Additionally, we observed a rise in H 2 O 2 content, a molecule involved in signal transduction, likely due to the oxidative stress caused by the pathogen. The expression patterns of mTERF genes varied significantly depending on both pathogen application and the developmental stage of the plants. In the seedling stage, inoculation with P. capcici resulted in decreased expression of TERF2, mTERF6, and mTERF8 genes in leaf parts of both resistant and susceptible varieties. However, mTERF28 expression showed a significant increase. Interestingly, mTERF14 and mTERF27 gene expressions increased in the resistant variety but decreased in the susceptible one. These findings, although not providing a complete picture of host resistance mechanisms, highlight the crucial role of specific plant genes in the defense pathways against Phytophthora capsici . This knowledge can contribute to selecting pepper varieties with sustainable resistance to this devastating pathogen.
Evaluation of Some Berry Quality Characteristics in Vitis Vinifera Cv. Kalecik Karasi Clones
(Friends Science Publ, 2012) Keskin, Nurhan; Bingol, Omer; Kuru, Ibrahim Selcuk
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, respectively; whereas glucose/fructose ratio ranged from 0.900 to 0.955. Likewise, soluble solids, total acidity and pH ranged from 21.00 to 25.60%, 0.30 to 0.55% and 3.00 to 3.70, respectively. The overall similarity level of all clones was found 80.278%. As a result, it can be concluded that three Kalecik Karasi clones: 6, 18 and 19 may be considered to have reasonable performance in terms of evaluated characteristics in the study. (C) 2012 Friends Science Publishers
Β-Carboline Production From in Vitro Regenerated Peganum Harmala L. Plant
(Parlar Scientific Publications (p S P), 2018) Onlu, Seyma; Bingol, Omer; Turker, Musa; Ozdemir, Fethi Ahmet
Peganum harmala L. seeds were germinated in hormone free sterile MS medium. Root, shoot tip, leaf, petiole, hypocotyl, cotyledon and nod explants excised from in vitro regenerated plants were incubated in MS medium supplemented with 1 mg/l and 2 mg/l 2,4-D for callus production. Hypocotyl and cotyledon explants produced callus and untreated callus was accepted as control for the comparison of beta-carboline alkaloids production extracted from different samples. Callus were exposed to cold and dark conditions and incubated in MS medium supplemented with 2 mg/l ABA, 1 mg/l ABA, 1 mg/l NAA and 1 mg/l BAP in different batches to increase beta-carboline alkaloid production. Seeds were germinated in soil ambient condition. beta-carboline alkaloids; harmalol, harmine and harmaline were extracted from seeds, plants grown in soil, callus grown in MS medium supplemented with 2,4-D, callus incubated MS medium supplemented with NAA, BAP, ABA and callus exposed cold and dark condition. The extracts were quantitatively analysed with HPLC. The highest alkaloid concentrations were determined in vivo seeds and plants grown in soil. However, alkaloid production in callus tissues is also promising. Harmalol and harmine concentration decreased with cold treatment but increased with ABA treatment compared to that of the control. Harmaline was increased with cold treatment, but dramatically decreased in all treatment that callus is exposed.