Browsing by Author "Kuru, Ibrahim Selcuk"

Now showing 1 - 2 of 2

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