Browsing by Author "Bitik, Selma Kipcak"

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Influence of Combinations of Chemical and Organic Fertilizers on Biochemical Responses of Tomato Fruits in Different Maturity Stages
(Amer Chemical Soc, 2025) Ekincialp, Aytekin; Bitik, Selma Kipcak; Erdinc, Ceknas; Sensoy, Suat
This study evaluates the impact of organic and conventional fertilizers on the quality attributes of Nergis F1 tomatoes. The fertilizers tested included full-dose vermicompost (VC), organo-mineral fertilizer (OMF, 11:11:11), chemical fertilizer (CF, 20:20:20), and their combinations. Key quality parameters were assessed, including pH, titratable acidity (TA), total soluble solids (TSS), ascorbic acid (AsA), lycopene, beta-carotene, organic acids, phenolic compounds, total antioxidant capacity (TAC), total phenols (TP), respiration rate, and ethylene production. Results showed that the OMF treatment significantly increased TSS at the red maturity stage (8.33 degrees Brix), while the highest TSS value (8.65 degrees Brix) was observed in T1, followed closely by T4. Treatments T10 and T9 also exhibited elevated TSS levels at the red and pink maturity stages, respectively. Additionally, combinations of OMF and VC positively influenced organic acid and phenolic compound concentrations. These findings highlight the potential of organic and organo-mineral fertilizers to enhance tomato quality and support sustainable agricultural practices.
Mitigation Effects of Gamma Ir 1 Radiation (60co) and Trichoderma Species Against Fusarium- and Pythium-Induced Diseases in Cucumber
(Springer, 2025) Gunes, Hasret; Hatipoglu, Murside; Yildiz, Muhsin; Bitik, Selma Kipcak; Erdinc, Ceknas; Demir, Semra
Cucumber (Cucumis sativus L.) is a vegetable widely grown worldwide for its agricultural, economic and nutritional value. With the increase in cucumber cultivation areas in recent years, soil-borne plant disease such as Pythium spp. and Fusarium wilt (FW) have caused significant economic losses for producers. Filamentous Trichoderma fungi and gamma radiation are well known for their ability to stimulate many plant-pathogen fungal interactions, plant defense mechanisms against these fungi (antagonistic, competitive, etc.), and plant growth. This study aims to examine the effects of Trichoderma spp. (Trichoderma harzianum and Trichoderma virens), which are among the sustainable practices against F. oxysporum f. sp. cucumerinum and P. aphanidermatum pathogens, and the effects of gamma rays (0, 50, 100, 150, 200, and 250 Gy), which are used as a reliable method for changing physiological and biochemical processes in plants and investigating their interactions with pathogens. The results revealed that the interaction between gamma rays and Trichoderma species increased the fresh and dry weights and shoot and root length values of the cucumber plants and decreased the disease severity. When Trichoderma harzianum (%51-%78 impact) and Trichoderma virens (%40-%67 impact) were compared, their effects on plant growth and disease severity were determined to vary according to parameters and gamma doses. These results indicate that gamma mutations may improve the biocontrol properties of T. harzianum and T. virens. According to the results of this study, gamma rays can be used in sustainable agricultural practices together with Trichoderma spp. as a bioformulation against pathogens that cause wilt and root rot in cucumber [F. oxysporum f. sp. cucumerinum (72%) and P. aphanidermatum (66%)] against.
Mitigation Effects of Gamma Irradiation (60co) and Trichoderma Species Against Fusarium and Pythium Diseases in Cucumber (Vol 54, Pg 45, 2025)
(Springer, 2025) Gunes, Hasret; Hatipoglu, Murside; Yildiz, Muhsin; Bitik, Selma Kipcak; Erdinc, Ceknas; Demir, Semra