Scopus İndeksli Yayınlar Koleksiyonu

Permanent URI for this collectionhttps://hdl.handle.net/20.500.12514/3596

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Alternaria Alternata Causing Inner Black Rot of Lemon (Citrus Limon) Fruits in Turkey: Genetic Diversity and Characterisation
(Academic Press Ltd- Elsevier Science Ltd, 2023) Gunen, Tacettin Utku; Ozer, Goksel; Dervis, Sibel; Guney, Inci Guler; Tekin, Fatih
The market sales of symptomless lemons in 2020 revealed a persistent and severe internal black rot with browning of the membrane wall and juice sac. To investigate the causal agent, externally symptom-free lemons from Mediterranean locations were sampled from supermarkets, local markets, and bazaars in three southeastern Turkish provinces. Internal black rot symptoms were observed in 13.69% of the 1300 externally symptomless fruits, and Alternaria was isolated from 96.63% of those exhibiting these symptoms. Morphological analysis confirmed the identity of Alternaria alternata in 26 representative isolates collected from various markets and bazaars. To examine genetic diversity or polymorphisms, start codon targeted (SCoT) markers were used. Species identification was based on the sequences of translation elongation factor 1-alpha (TEF 1-alpha), RNA polymerase second largest subunit (RPB2), and glyceraldehyde-3-phosphate dehydrogenase (GAPDH). SCoT 29 exhibited the highest amount of polymorphic amplicons, with 18 polymorphic bands scored when compared to the other six scoreable markers. The 26 representative isolates from various markets and bazaars were divided into four clades by SCoT 29. However, multilocus sequence analyses confirmed the identification of a single species, A. alternata. In terms of virulence and the impact of temperature on growth, representative isolates from four SCoT clusters were evaluated. Data suggests that SCoT markers can be used to evaluate virulence-based polymorphism in A. alternata; nonetheless, all clades showed comparable temperature responses, with 25 degrees C being the optimum. There was also no association between individual morphotypes and SCoT clade membership. Due to the lack of obvious signs on lemon fruits, producers, merchants, and consumers are unable to identify black rot, and the widespread presence of A. alternata in lemons may pose a significant risk that must be avoided at all costs.
Citation - WoS: 1
Citation - Scopus: 1
Carbonates and Bicarbonates: a Sustainable Approach for Managing Plant Diseases, Pests, and Abiotic Stresses
(Academic Press Ltd- Elsevier Science Ltd, 2025) Turkkan, Muharrem; Ozer, Goksel; Taheri, Parissa; Dervis, Sibel
The growing global food demand necessitates sustainable agricultural practices that minimize environmental impact while ensuring high yields. Synthetic pesticides, while crucial for crop protection, raise concerns about environmental contamination, resistance development, and harm to non-target organisms. Carbonates and bicarbonates (e.g., NaHCO3, KHCO3, CaCO3) offer a promising, Generally Recognized as Safe (GRAS) alternative for integrated pest and disease management and abiotic stress mitigation. These compounds exhibit broadspectrum efficacy against diverse fungal, oomycete, bacterial, and insect pathogens, including the clubroot protist (Plasmodiophora brassicae). Their direct antimicrobial mechanisms involve disrupting pathogen cell membranes and walls, inducing osmotic stress, and altering pH, which leads to pathogen death. Beyond direct toxicity, carbonates and bicarbonates also elicit plant defenses, inducing systemic acquired resistance (SAR) and stimulating defense enzymes (e.g., peroxidase, polyphenol oxidase). Furthermore, they enhance soil health by raising pH, improving nutrient availability, structure, and water retention, while reducing heavy metal bioavailability. These soil improvements increase plant resilience to drought, salinity, and metal toxicity, with potential benefits also arising from improved stomatal regulation. Recent advancements have introduced carbonate nanoparticles as nano-fungicides and biostimulants, offering enhanced efficacy at lower application rates. Integrating carbonates/bicarbonates into Integrated pest management (IPM) programs, especially in combination with biocontrol agents and other beneficial salts, demonstrates synergistic effects and reduces reliance on conventional pesticides. However, further research is needed to elucidate detailed molecular mechanisms, assess long-term soil impacts, optimize application methods (e.g., foliar sprays, soil amendments, nanoformulations), and evaluate compatibility with other agrochemicals. Addressing these knowledge gaps will enable the full potential of these sustainable compounds for resilient and food-secure agriculture.
Citation - WoS: 14
Citation - Scopus: 17
Environmental Deterioration, Renewable Energy, Natural Resource Rents, and Schooling in Türkiye: Does the Degree of Energy Transition Matter for Environmental Quality?
(Academic Press Ltd- Elsevier Science Ltd, 2024) Bulut, Umit; Atay Polat, Melike; Bulut, Ahsen Seda; Atay-Polat, Melike
Within the literature on energy and environmental economics, it is generally acknowledged that renewable energy can improve environmental quality; however, certain papers suggest that an optimal level of the usage of renewable energy sources may exist. Consequently, the utilization of renewable energy sources can result in environmental degradation up to a certain threshold. Then, environmental quality can be enhanced through the continued application of renewables. This indicates that the link between renewable energy and environmental devastation is inverted U-shaped. This paper presents empirical evidence concerning this possible association between renewable energy and environmental destruction in T & uuml;rkiye, a country where fossil energy predominates in the energy mix. Additionally, the paper investigates the environmental influences of natural resource rents and schooling. This study utilizes annual data from 1971 to 2020 and implements time series methodologies that rely on the Fourier approximation. The paper thus accounts for an undetermined quantity of structural breaks. The results suggest that an inverted U-shaped link occurs between renewable energy and environmental destruction, signifying renewable energy initially contributes to a diminution in environmental quality before subsequently improving it. Additionally, environmental quality is positively associated with natural resource rents and negatively associated with schooling, according to the findings. Furthermore, the findings reveal that schooling worsens the combined effect of renewable energy on environmental degradation. These conclusions are discussed in the paper.
Citation - WoS: 2
Citation - Scopus: 2
First Report Of Colletotrichum Perseae Causing Anthracnose Disease of Avocado ( Persea Americana) in Türkiye
(Academic Press Ltd- Elsevier Science Ltd, 2024) Bozoglu, Tugba; Turkkan, Muharrem; Ozer, Goksel; Guney, Inci Guler; Dervis, Sibel
Colletotrichum-induced anthracnose is a major disease of avocado (Persea americana), causing significant losses in production worldwide. In 2023, a survey of avocado fruits in markets within the K & imath;z & imath;ltepe district of Mardin, T & uuml;rkiye, revealed symptoms of anthracnose, characterized by brown-black lesions and internal necrosis. To identify the causal agent, 20 symptomatic avocado fruits were collected and fungal isolates resembling Colletotrichum species were obtained. Morphological characterization, multilocus sequence analysis of the internal transcribed spacer (ITS), actin (act), the apn2-Mat1-2 intergenic spacer (ApMat), and calmodulin (cal) loci, and pathogenicity testing were performed for only two representative isolates (Pa01 and Pa02). These analyses identified the pathogen as Colletotrichum perseae. The isolates readily formed ascomata on all culture media tested, suggesting a high capacity for sexual reproduction. Pathogenicity tests confirmed that C. perseae caused characteristic dark, sunken anthracnose lesions on avocado fruits. This is the first report of C. perseae causing anthracnose in avocados in T & uuml;rkiye, expanding the known geographical distribution of this pathogen. The findings highlight the need for effective disease management strategies and further research to understand the pathogen's lifecycle, environmental conditions favoring infection, and potential for seedborne transmission.
Self-Control as a Key Mediator and Moderator of the Relationship Between Psychological Distress and Food Addiction in a Large Community Sample of Adults
(Academic Press Ltd- Elsevier Science Ltd, 2026) Ceylan, Jiyan Aslan; Korkmaz, Aziz; Hatipoglu, Abdulkerim; Akcali, Caglar; Coskunsu, Sedat
Objective: This study investigated the extent to which psychological distress (depression, anxiety, and stress) predicts food addiction (FA) symptoms and examined whether self-control operates as both a mediator and a moderator in these associations. Method: A total of 4234 adults (40.7 % male) participated in a large-scale, community-based, cross-sectional survey conducted in T & uuml;rkiye. FA symptoms were measured via the Yale Food Addiction Scale (YFAS), self-control was assessed via the Brief Self-Control Scale (BSCS), and psychological distress was evaluated via the Depression Anxiety Stress Scales (DASS-21). Statistical analyses were conducted in SPSS, with significance defined at p < 0.05. Results: Overall, 35.1 % of the participants met the criteria for FA, with no significant sex difference (p = 0.19). Logistic regression analyses revealed that greater anxiety (OR = 1.078, p < 0.01) and stress (OR = 1.109, p < 0.01) were significant predictors of increased risk for FA, whereas greater self-control emerged as a protective factor (OR = 0.952, p < 0.01). Mediation analyses confirmed that self-control partially accounted for the effects of psychological distress on FA symptoms, with significant indirect effects observed for stress (beta = 0.025), anxiety (beta = 0.029), and depression (beta = 0.032). Moderation analysis revealed that self-control attenuated the effect of depression on FA symptoms (interaction term: B = 0.002, p < 0.01), although no moderating effects were found for anxiety or stress. Conclusions: This study highlights self-control as both a mechanism through which psychological distress contributes to food addiction and a protective factor that reduces its impact. Enhancing self-control may help mitigate addiction-related eating behaviors.

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