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- ArticleAçık Erişim2026Investigation of antiphytoviral effects of thymol, eugenol, and 1,8-cineol essential oils on cucumber mosaic virus in Turkey
Karakus, Sinem; Akdura, Nevin; Culal-Kılıc, Handan
The exploration of natural antiviral agents, such as essential oils, is a critical area of research, offering promising alternatives for sustainable plant disease management and contributing to global agricultural resilience. In this regard, the present study investigated the antiviral efficacy of thymol, eugenol, and 1,8-cineol essential oils (EOs) against cucumber mosaic virus (CMV) in vivo. It focused on assessing the capability of these EOs, particularly at a concentration of 500 ppm, in both prophylactic and therapeutic contexts for plant health, particularly when applied prior to or concurrently with viral infection. The evaluation involved measuring a range of parameters, including local lesions of CMV on cucumber plants, symptom index, leaf width, plant height, and virus accumulation. Our findings demonstrated that thymol was significantly effective in mitigating CMV infection. Both eugenol and 1,8-cineole oils also showed efficacy in reducing local lesions when applied to host plants alongside the infecting virus. Based on our results, the essential oils exhibited substantial protective and curative effects against CMV, with the preventative (pre-inoculation) application proving more effective. In conclusion, this study highlights the potent antiviral activity of thymol, eugenol, and 1,8-cineole EOs against CMV, presenting them as viable alternative strategies for combating viral diseases in plants. In addition, our findings not only advance our understanding of plant-virus interactions, but also pave the way for more eco-friendly and effective agricultural practices, crucial in the face of escalating plant disease challenges worldwide.
RDL Kalıcı Kaydıİncele - ArticleYayıncıda açık erişim2025Inoculating maize (Zea mays L.) seeds with halotolerant rhizobacteria from wild halophytes improves physiological and biochemical responses of seedlings to salt stress
Atici, Ökkeş; Aydın, İhsan; Karakus, Sinem; Tiryaki, Deniz
Salinity stress is a major environmental factor that poses a significant constraint to plant growth, threatening agricultural productivity and sustainability. This study investigated the potential of halotolerant bacteria, isolated from the rhizosphere of wild halotolerant plants in Turkey’s Salt Lake basin, to enhance salt stress tolerance in maize (Zea mays L.). The rhizospheres of 17 different wild halotolerant plants were selected for bacterial isolation, resulting in the identification of 22 halotolerant bacteria using 16S rRNA sequence analysis. Among these, 19 isolates were found to possess positive activity for 1-aminocyclopropane-1-carboxylate (ACC) deaminase and nitrogen fixation. When the maize seeds inoculated with these 19 isolates were grown under normal conditions, four isolates‒TG-4 (Halomonas arcis), TG-8 (Marinococcus tarigensis), TG-12 (Halobacillus dabanensis), and TG-20 (Halomonas eurihalina)–significantly stimulated seedling growth and development. To evaluate the effect of these four isolates on salt tolerance, inoculated seeds were grown under various salt conditions (0.0, 75, 150, and 250 mM NaCl). The responses of plants to salt stress were analyzed by evaluating growth parameters, membrane damage, photosynthetic pigment and proline content, reactive oxygen species and lipid peroxidation levels, and antioxidant enzyme activities. According to the parameters, the results indicated that TG-4, TG-8, and TG-12, in particular, have the potential to function as plant growth-promoting rhizobacteria and effectively enhance salt stress tolerance in the maize seedlings. Overall, this research highlights the potential of halotolerant bacteria to improve salt stress tolerance in maize plants through multifaceted mechanisms, offering valuable insights for sustainable agriculture in saline environments.
RDL Kalıcı Kaydıİncele - CorrectionAçık Erişim2025Correction to: Essential oils combat Botrytis cinerea in apples: unveiling sugar, vitamin, and antioxidant dynamics (Journal of Food Measurement and Characterization, (2024), 18, 7, (5590-5601), 10.1007/s11694-024-02590-y)
Karakus, Sinem; Atıcı, Okkes; Turan, Metin; Kaya, Ozkan
In this article, the second reference ‘A. Muder, H. Garming, S. DreisiebnerLanz, K. Kerngast, F. Rosner, K. Klickova, G. Kurthy, K. Cimer, A. Bertazzoli, V. Altamura, G. De Ros, K.M.B.C. Zmarlicki Freitas, A. Duarte, E. Bravin, J. Kambor, D. Karamürsel, F.P. Öztürk, E. Kaçal, Apple production and apple value chains in Europe. Eur. J. Hortic. Sci. 1611–4434 (2022)’ was incorrectly published and should have been ‘A. Muder, H. Garming, S. DreisiebnerLanz, K. Kerngast, F. Rosner, K. Klickova, G. Kurthy, K. Cimer, A. Bertazzoli, V. Altamura, G. De Ros, K.M.B.C. Zmarlicki Freitas, A. Duarte, E. Bravin, J. Kambor, D. Karamürsel, F.P. Öztürk, E. Kaçal, Apple production and apple value chains in Europe. Eur. J. Hortic. Sci. 87(6), 1–22 (2022). https://doi.org/10.17660/ejhs.2022/059’. The original article has been corrected.
RDL Kalıcı Kaydıİncele - ArticleAçık Erişim2025Modulation of Biochemical Traits in Cold-Stored ‘Karaerik’ Grapes by Different Edible Coatings
Keskin, Nurhan; Karakus, Sinem; Hatterman-Valenti, Harlene; Kaya, Ozkan; Cavusoglu, Seyda; Tekin, Onur; Kunter, Birhan; Keskin, Sıddık; Kaya, Ahmet Çağlar; Karadogan, Birol
Understanding the effects of edible coatings on postharvest quality and shelf life of ‘Karaerik’ grapes is crucial for improving storage outcomes and reducing losses. However, limited information exists regarding the effectiveness of different coating materials on this regionally significant variety. In this study, ‘Karaerik’ grapes were treated with carboxymethyl cellulose (CMC) and locust bean gum (KB) coatings and stored under cold conditions (0 ± 0.5 °C, 90–95% relative humidity) for 0, 25, 45, and 60 days. Storage duration and coating treatments significantly affected most physical, physiological, and biochemical parameters. During storage, grape weight loss progressively increased, reaching 9.60% in the control by day 60. Coatings slightly reduced this loss, with KB showing the lowest (5.11%) compared to the control (5.69%). Respiration initially declined but surged again at day 60, especially in the control (96.4 μmol CO2/kg·hour), while coatings helped mitigate this rise. Ethylene release remained unchanged. A slight pH decline (~4.6%) was observed in the control, while KB-treated grapes maintained higher pH and lower acidity. Soluble solids remained stable across treatments. Color changed notably during storage: a* nearly doubled (more redness), b* increased (less blue), and chroma (C*) declined by ~25%, especially in uncoated grapes. Total sugar dropped by ~43% in KB-treated grapes, with the control retaining the most. Tartaric acid decreased by ~55%, notably in KB samples. Antioxidant activity and total phenolics declined significantly (~66%) in the control. CMC coating better-preserved antioxidant capacity, while the control showed the highest phenolic levels overall. Ferulic, gallic, and chlorogenic acids increased toward the end of storage, particularly in coated grapes. In contrast, rutin and vanillic acid peaked mid-storage and were better preserved in the control. The heatmap showed significant metabolite changes in fruit samples across 0D, 25D, 45D, and 60D storage periods under CMC, CNT, and KB treatments, with distinct clustering patterns revealing treatment-specific biochemical responses. The correlation matrix revealed strong positive relationships (r > 0.70) between total sugar, glucose, and fructose levels, while ethylene showed significant negative correlations (−0.65 to −0.85) with maturity index, pH, and total soluble solids, indicating interconnected metabolic pathways during fruit ripening and storage. We conclude that edible coating selection significantly influences grape biochemical stability during cold storage, with CMC emerging as a superior choice for maintaining certain quality parameters.
RDL Kalıcı Kaydıİncele - ArticleAçık Erişim2025Timing Matters, Not Just the Treatment: Phenological-Stage-Specific Effects of Seaweed and Ethanol Applications on Postharvest Quality of ‘Tarsus Beyazı’ Grapes
Tarım, Güzin; Karakus, Sinem; Keskin, Nurhan; Hatterman-Valenti, Harlene; Kaya, Ozkan
In the context of increasing consumer demand for high-quality, residue-free fruits and the growing emphasis on sustainable postharvest technologies, identifying effective, eco-friendly treatments to maintain grape quality during storage has become a critical focus in modern viticulture. Over the course of this study, we examined the influence of seaweed extract (derived from Ascophyllum nodosum) and ethanol-based postharvest treatments on the postharvest quality of the ‘Tarsus Beyazı’ grape. The seaweed extract was applied at six specific phenological stages according to the BBCH scale: BBCH 13 (3rd–4th leaf stage, 0.40%), BBCH 60 (first flower sheath opening, 0.50%), BBCH 71 (fruit set, 0.50%), BBCH 75 (chickpea-sized berries, 0.50%), BBCH 81 (start of ripening, 0.60%), and BBCH 89 (harvest maturity, 0.60%). After harvest, grape clusters were subjected to four different postharvest treatments: untreated control, control + ethanol (20% ethanol immersion for 10 s), seaweed extract alone (preharvest applications only), and seaweed extract + ethanol (combining both preharvest and postharvest treatments). Grapes were stored at 0–1 °C and 90–95% RH for three weeks, followed by a shelf-life evaluation period of three days at 20 °C and 60–65% RH. The findings revealed that seaweed treatments, especially when applied during cluster formation and berry development, effectively mitigated physiological deterioration, preserving stem turgidity and enhancing berry firmness. In contrast, ethanol showed variable responses, occasionally exerting negative effects, with only marginal benefits observed when applied at optimal developmental stages. Both the type and timing of application emerged as critical determinants of key quality attributes such as weight loss, decay incidence, and must properties (TSS, pH, TA). Correlation and heat map analyses indicated the interrelationships among these parameters and the differential impacts of treatments. These results suggest that phenological-stage-specific seaweed applications hold significant potential as a sustainable strategy to extend the storage life and maintain the market quality of ‘Tarsus Beyazı’ grapes.
RDL Kalıcı Kaydıİncele - ArticleAçık Erişim2024Essential oils combat Botrytis cinerea in apples: unveiling sugar, vitamin, and antioxidant dynamics
Karakus, Sinem; Atıcı, Okkes; Turan, Metin; Kaya, Ozkan
This study investigated the effects of individual and combination applications of EOCs against Botrytis Cinerea in apple fruits, with a focus on sugar, vitamin, and antioxidant enzyme dynamics. In protective and curative treatments, sucrose content varied between 18.9 and 87.9 g.L-1, with the “CT” group exhibiting significantly higher sucrose levels (87.9 g.L-1). Glucose content ranged from 6.2 g.L-1 (“CT” and “C + F”) to 35.5 g.L-1 (“T + C + E + F”). Fructose content varied significantly, with the “F + T + C + E” treatment showing the highest (11.4 g.L-1) and the “CT” group the lowest (2.5 g.L-1). Rhamnose content in the curative treatment reached 14.9 g.L-1 (“F + T”) and in the protective treatment, the “C + E + F” group had the highest (3.3 g.L-1). Galactose content ranged from 0.1 to 13.0 g.L-1. Xylose content in curative treatment ranged from 12.1 to 13.6 g.L-1, with the combination “F + T” displaying the highest. In preventive treatment, arabinose content ranged from 0.7 to 3.0 g.L-1, with the “T + C + F” group having the highest. In terms of vitamins, the combination “T + F” showed the highest B1 (25.4 mg.100 g-1) and B2 (24.6 mg.100 g-1) content. Vitamin A, B1, and B2 increased in the “F + T” group, and vitamin C increased in the “F + T + C” group (33.4 mg.100 g-1). The quantification of oxidative stress markers and antioxidant enzymes revealed significant reductions in H2O2, MDA, and proline levels in EOC applications. In preventive treatment, the combination “T + C + E + F” exhibited the most effective improvement in SOD activity (556.5 EU mg-1), CAT activity increased significantly in the “T + C + F” group (189.3 EU mg-1), and APX activity saw the highest increase in the “T + C + E + F” group (185.6 EU mg-1). Contrastingly, curative treatments showed higher H2O2, MDA, and proline levels. The most significant decrease in H2O2 level occurred in the “T + C + E + F” group (36.7 nmol.g-1), and a significant decrease in MDA level was noted in the same group. Notable changes were observed in the activities of antioxidant enzymes, with the “F + T + C + E” group displaying the highest SOD activity (440.7 EU mg-1), and the “F + T” group showing the highest GST activity (542.0 EU mg-1). This research provided comprehensive insights into the biochemical responses of apple fruits to EOC treatments, offering potential strategies for effective fungal management in agriculture.
RDL Kalıcı Kaydıİncele - ArticleYalnız künye2024Essential oils in post-harvest disease management: Metabolic impact on Narince (Vitis vinifera L. cv) grapes against Botrytis cinerea
Kaya, Ozkan; Bozkurt, Abdurrahim; Karakus, Sinem; Daler, Selda; Yilmaz, Turhan; Turan, Metin
There is an urgent need for alternative, environmentally friendly post-harvest disease management solutions because of the growing concern over the use of chemical fungicides in agriculture and their detrimental impact on human health and the environment. This study examines the effects of thymol, eugenol, and 1,8-cineole essential oils on the sugar, organic acid, and amino acid profiles of 'Narince' grape berries as well as their effectiveness against gray mold (Botrytis cinerea). Our study has noted that the application of EOs, particularly eugenol, significantly alters the metabolic profile of 'Narince' grapes, enhancing sugar content and modifying the levels of organic acids and amino acids, which suggests a potential for improving grape quality and resistance to Botrytis cinerea. The combined use of eugenol with other EOs and fungicides, as indicated by the treatments OF and OSF, not only displayed a synergistic effect in elevating the concentration of key metabolites but also appeared to be more effective in combating fungal infection compared to individual EO applications. The PCA analysis and subsequent heatmap visualization revealed distinct metabolic clustering among the treatments, with combined EO treatments, especially those including eugenol, markedly influencing the amino acid profile of the berries. Our investigation's results suggest that EOs may offer a viable, eco-friendly alternative to traditional fungicides. Our study also adds to the body of knowledge supporting the advancement of integrated pest management strategies that are efficacious yet environmentally considerate, aligning with the global shift towards more sustainable practices in agriculture and food security.
RDL Kalıcı Kaydıİncele - ArticleAçık Erişim2024Enhancing Post-Harvest Resilience: Investigating the Synergistic Effects of Essential Oil Combinations on Biochemical Profiles in Botrytis cinerea-Infected Apples
Karakus, Sinem
This study explored the impact of essential oil combinations on Botrytis cinerea-infected apples, focusing on how these treatments affect the levels of amino acids, anthocyanins, organic acids, phenolic compounds, and hormones. We discovered significant differences in amino acid concentrations, particularly asparagine, serine, histidine, glycine, and arginine, between control and fungus-treated apples. Preventive measures notably increased anthocyanins like delphinidin-3-glycoside and peonidin-3-glycoside, while combinations such as thymol + fungus balanced anthocyanin profiles effectively. Organic acid and phenolic compound analyses showed that curative strategies generally increased concentrations, with the thymol + cineole + fungus treatment being especially effective. Hormonal analysis highlighted the benefits of preventive measures in raising indole-3-acetic acid and gibberellic acid levels, whereas curative treatments increased abscisic acid and salicylic acid concentrations. The combination of cineole and thymol with fungicide emerged as a potent strategy for enhancing phenolic content. These findings underscore the potential of specific essential oil combinations in improving the biochemical composition of B. cinerea-infected apples, offering new avenues for enhancing fruit quality and sustainability in the agriculture sector.
RDL Kalıcı Kaydıİncele - ArticleAçık Erişim2024Physico-Chemical Responses of Alstroemeria spp. cv. Rebecca to the presence of Salicylic Acid and Sucrose in vase solution during postharvest life
Seyed Hajizadeh, Hanifeh; Bayrami Aghdam, Somayeh; Fakhrghazi, Hadi; Karakus, Sinem; Kaya, Ozkan
Background: The primary challenge in the cut flower industry, specifically in the postharvest phase, is the short vase life of flowers. This issue, along with early leaf yellowing and perianth abscission, significantly diminishes the economic value of flowers due to their accelerated senescence. To tackle this, we conducted a factorial experiment on Alstroemeria cv. Rebecca, utilizing a completely randomized design with three replications. In this experiment the effects of varying concentrations of Salicylic acid (SA) (0, 1.5, and 3 mM) and sucrose (SU) (0% and 3%) were investigated on the postharvest quality of leaves and florets, with systematic evaluations every three days throughout their vase life. Results: This experiment revealed that the specific treatment combination of 1.5 mM SA + 3% SU (T5) markedly improved various parameters, such as vase life, total chlorophyll content, membrane stability index, relative fresh weight, and water uptake of cut flowers. In our analysis, we observed that this preservative solution not only extended the vase life and enhanced water uptake but also effectively preserved total chlorophyll, mitigated the loss of fresh weight, and reduced membrane deterioration in petals. Additionally, our results showed an increase in the activities of catalase (CAT) and peroxidase (POD) enzymes, as well as total protein content, alongside a decrease in malondialdehyde (MDA) and hydrogen peroxide (H2O2) levels. Moreover, this study noted a decrease in microbial populations in solutions containing different concentrations of salicylic acid. Conclusions: Our research demonstrated that alstroemeria flowers maintained in a solution with 1.5 mM SA + 3% SU exhibited a significantly prolonged vase life of up to 21 days, in contrast to the 15 days observed in control flowers kept in water. These results are highly beneficial for manufacturers in the cut flower industry, as they provide a viable method to substantially extend the vase life of cut flowers. Such an enhancement in flower longevity can lead to increased market value and customer satisfaction. Furthermore, the reduction in flower senescence and decay rates can contribute to decreased waste and greater efficiency in cut flower distribution and sales, offering a substantial advantage to manufacturers in this competitive market. The extended vase life and reduced senescence observed in alstroemeria flowers treated with 1.5 mM SA and 3% SU are attributed to SA's role in enhancing endogenous defense responses and sucrose's function as an energy source, collectively improving water uptake, and delaying the natural decay process.
RDL Kalıcı Kaydıİncele - ArticleYalnız künye2024Essential oil compounds modulate nutritional quality and stress response in Botrytis cinerea-infected grape (Vitis vinifera L. cv. ‘Karaerik’)
Kaya, Ozkan; Bozkurt, Abdurrahim; Karakus, Sinem; Daler, Selda; Yilmaz, Turhan
Grapes, rich in vitamins and minerals, could offer a healthy alternative. However, their potential contamination by the fungus Botrytis cinerea poses serious health risks, necessitating cautious consumption, particularly among those on restricted diets, to mitigate adverse effects. Therefore, the study investigated the effects of individual and combined application of individual components of essential oils (EOs) such as thymol, eugenol, and 1,8-cineole on various parameters such as antioxidant enzymes, mineral elements, anthocyanins, and phenolic compounds in the treatment of B. cinerea infection in 'Karaerik' grapes. Our study provided important information about physiology and pathogen response, and results indicated that the pathogen-infected groups had higher levels of oxidative stress indicators, such as proline, malondialdehyde (MDA), and hydrogen peroxide (H2O2). On the other hand, EOs elevate the activity of antioxidant enzymes, notably superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT), whereas thymol treatments effectively reduced oxidative stress to levels comparable to the control group. Under thymol and eugenol treatments, nitrogen (N), potassium (K), phosphorus (P), calcium (Ca), magnesium (Mg), sulfur (S), zinc (Zn), manganese (Mn), boron were significantly higher than the control groups. Increases were also determined in the concentrations of mineral elements such as (B) and copper (Cu). Anthocyanin profiles were preserved by EO treatments, with combined EO applications yielding higher anthocyanin profiles percentages compared to individual treatments. In our results, there were notable differences in the overall quantities of phenolic compounds, and the combination of EO applications caused higher levels of phenolic compounds, especially in the groups that include the fungal infection. Overall, the study showed how effective EO treatments are at reducing B. cinerea infections and maintaining grape quality, which has significance for long-term disease control plans and maintaining berry quality in viticulture.
RDL Kalıcı Kaydıİncele - ArticleAçık Erişim2024Understanding the impact of essential oils on grape metabolism and pathogen resistance: a study with a focus on Botrytis cinerea
Kaya, Ozkan; Karakus, Sinem; Bozkurt, Abdurrahim; Yilmaz, Turhan; Hajizadeh, Hanifeh Seyed; Turan, Metin
Background: The exploration of EOs and their impact on primary metabolites in agricultural products, such as grapes, holds significant importance in the post-harvest preservation and enhancement of berry quality. Therefore, our research aimed to dissect the effects of various EO treatments on the biochemical composition of grapes, specifically examining alterations in sugar, organic acid, and amino acid levels. Results: Our findings highlighted that the OF treatment, a combination of Eugenol and Botrytis cinerea, significantly escalated sugar content, with remarkable increases in sucrose, glucose, and fructose compared to the control group. The SF treatment led to the highest levels of certain organic acids, including tartaric, butyric, and malonic acids, whereas the TO treatment prominently augmented amino acids such as tyrosine and phenylalanine. Utilizing PCA, our study effectively captured the variability within the treatment dataset, revealing distinct clusters of treatments and their correlations with specific metabolites. The PCA biplot underscored the influence of treatments on metabolic profile of grape berries, with treatments like OSF, TO, and TOSF demonstrating close associations with specific amino acids, suggesting positive correlations. Conclusion: Our current results indicate that EOs substantial influence on the metabolic profile of grapes, resulting in enhanced fruit quality and extended shelf life. Variations in sugar, organic acid, and amino acid levels among different EO treatments highlight their potential for improving post-harvest characteristics. To sum up, these findings are valuable for the agricultural and food industries, showcasing the utility of EOs as natural preservatives and enhancers in fruit cultivation and storage. Graphical Abstract: (Figure presented.)
RDL Kalıcı Kaydıİncele - ArticleYalnız künye2023Comparison of contents of sugars, organic acids and free amino acids in raisins obtained from Gök Üzüm (Vitis vinifera L.)
Karakus, Sinem; Ates, Fadime; Keskin, Nurhan; Turan, Metin; Kaya, Ozkan
Raisins are known as an important source of many bioactive compounds such as organic acids, free amino acids, and sugars. In this study, oak ash and potassium carbonate solutions applied before drying were compared for their effects on the Gök Üzüm raisin, more specifically, its contents of organic acids, free amino acids, and sugar profile. The total acidity quantified in the samples of raisin, ranged from 20.30 to 117.08 ng/µL DW for the potassium dipping solution, while values ranged from 17.98 to 164.72 ng/µL DW for the oak ash dipping solution. In samples from either dip solution, serine was predominant, followed by alanine, asparagine, glutamine, aspartate, sarcosine, glutamate, and leucine, whereas gly-cine, arginine, proline, histidine, and valine were found to be the lowest amino acids. In the samples examined, fructose was the most abundant sugar, whereas the lowest sugars in raisins were xylose for oak ash application and galactose for potassium carbonate application. There was wide variation in the sugar profiles for both variants, with values ranging from 3043.48 to 0.71 g/100 g DW. Drying Gök Üzüm grapes after the treatment of oak ash dipping solution promotes a higher content of organic acids, amino acids and sugars as compared to drying after potassium carbonate solution treatments. These results could be used for the development of an attractive pre-drying solution in further studies for the production of both, raisins and perhaps other dried fruits.
RDL Kalıcı Kaydıİncele - ArticleAçık Erişim2023Characterization of volatile compounds of Gök Üzüm raisins produced from grapes pre-treated with different dipping solutions
Karakus, Sinem; Kaya, Ozkan; Hajizadeh, Hanifeh Seyed; Gutiérrez-Gamboa, Gastón; Ates, Fadime; Turan, Metin; Araya-Alman, Miguel
Background: Raisins contain a wide range of secondary metabolites, including volatile compounds that may contribute to the health benefits and preference of consumers. To our knowledge, this is one of the first studies concerning the analysis of volatile compounds in raisin. The goal of this study was to compare volatile composition of Gök Üzüm (Vitis vinifera L.) raisins produced from grapes dried before the application of two pre-treatments solutions: wood ash (WA) and potassium carbonate (K2CO3). Results: Gök Üzüm raisins produced from grapes dipped into the WA solution presented higher contents of most of the studied volatile compounds (including the total contents of C6 compounds, alcohols, benzenoids, esters, aldehydes, terpenes and C13 norisoprenoids) and lower contents of (Z)-2-hexenol and 2-hexenoic acid than the raisins produced from grapes dipped into K2CO solutions. Gök Üzüm raisins were characterized by fruity, floral and grass aromas according to their odor activity values. Drying Gök Üzüm grapes after the treatment of WA solutions promotes a higher aromatic composition compared to K2CO solutions. Conclusion: These findings can greatly assist raisin producers in deciding which dipping solution to use before using a dipping solution to dry the grapes. Graphical Abstract: [Figure not available: see fulltext.]
RDL Kalıcı Kaydıİncele - ArticleAçık Erişim2023Volatile organic compounds produced by some synthetic essential oils as biological fumigants against Botrytis cinerea on apples
Karakus, Sinem; Atıcı, Okkes; Turan, Metin; Azizi, Sahar; Hajizadeh, Hanifeh Seyed; Kaya, Ozkan
Background: Gray mold, attributed to Botrytis cinerea, poses a substantial threat to food security in fruit-growing regions impacted by global climate change. Addressing this disease requires the utilization of either resilient plant varieties or advanced technological interventions. In this study, the research focused on examining the volatile organic compounds (VOCs) emitted by synthetic essential oils, namely thymol, eugenol, 1,8-cineol, and their combination, as potential biological fumigants against B . cinerea on Golden Delicious apples. Results: In this study, a total of 53 compounds were identified and categorized into six distinct classes, which included (1) terpenes, (2) esters, (3) C6 compounds, (4) alcohols, (5) acids, and (6) aldehydes. The results we obtained revealed significant variations in the volatile compounds present in apples after harvest when treated with different essential oils to combat B. cinerea. Among the VOCs found in the fruits, the most abundant ones were pentanal, nerol, and ethyl octanoate. The essential oil combination of thymol, eugenol, and 1,8-cineol (Thy + Eug + Fun) had the most significant impact on the volatile compound content in the fruits. Conversely, both B. cinerea and the essential oils were observed to increase the volatile organic compound content in the fruits after harvest. Conclusion: The findings from this study underscore the significance of essential oils as effective biological fumigants for countering Botrytis cinerea on apples. Furthermore, the study suggests that these essential oils have the potential to influence the composition of volatile organic compounds in postharvest apples. This research offers valuable insights into the intricate interplay between volatile organic compounds and essential oils in apples, emphasizing the critical role of essential oils in preserving fruit quality during the post-harvest period. Graphical abstract: [Figure not available: see fulltext.].
RDL Kalıcı Kaydıİncele - ArticleAçık Erişim2022Changes in Biogenic Amines of Two Table Grapes (cv. Bronx Seedless and Italia) during Berry Development and Ripening
Incesu, Melek; Karakus, Sinem; Seyed Hajizadeh, Hanifeh; Ates, Fadime; Turan, Metin; Skalicky, Milan; Kaya, Ozkan
Bronx Seedless and Italia (Vitis vinifera L.) are a variety preferred by consumers owing to their exciting flavour and widely cultivated in Aegean Region in Turkey. The aim was to identify the biogenic amines of these table grapes during berry ripeness. The biogenic amines were analyzed by HPLC in six different berry phenological stages. Italia grapes presented lower biogenic amine content than Bronx Seedless table grapes. The concentration of most of the biogenic amines analyzed linearly raised from the beginning of berry touch to when berries ripen for harvest stages. The most common biogenic amines in grape varieties were putrescine, followed by histamine, agmatine, and tyramine. There was also a positive correlation between all biogenic amines of the two grape varieties. The weakest correlation was found between spermine and cadaverine, whereas the strongest correlation was found among dopamine, trimethylamine, norepinephrine, tyramine, and histamine amines. The present study is the first report of a synthesis study regarding the effect of B.A.s on quality characteristics throughout berry ripeness in grape varieties containing foxy and muscat tastes. The concentration and composition of biogenic amines identified for both varieties might provide helpful information regarding human health and the vintage.
RDL Kalıcı Kaydıİncele - ArticleYalnız künye2016Traditional knowledge on wild plants in Uzumlu (Erzincan-Turkey)
Korkmaz, Mustafa; Karakus, Sinem; Selvi, Selami; Çakilcioglu, Ugur
This survey was conducted in Uzumlu district and its surrounding villages in order to determine the useful plants consumed for different ethnobotanical purposes such as animal fodder, ornamental plant, good, fuel, and dye by the local people living in the area between 2010 and 2011 summer vegetation periods. Totally 77 traditional uses of 64 plant taxa were determined at the end of the study. The biggest families with the numbers of taxa were Fabaceae (10), Asteraceae (9), Rosaceae (6), Salicaceae (4) Brassicaceae, Poaceae, and Liliaceae (3). All parts of 42 plants, stems of 11 plants, flowers of 6 plants, branches of 5 plants, seeds of 3 plants, fruits of 3 plants, aerial parts of 2 plants, fruit exocarp of 2 plants, and root of 1 plant were determined to be used for different purposes. In addition, local names and ethnobotanical aspects of totally 17 taxa (26.5 %) were presented firstly in this study. East Anatolia is a very important region of Turkey in terms of plant diversity, and many studies have been conducted on the traditional uses of plants; but, the least have been carried out in Erzincan province. Because of that, this study was conducted in the area.
RDL Kalıcı Kaydıİncele - ArticleYalnız künye2015TRADITIONAL USES OF MEDICINAL PLANTS OF UZUMLU DISTRICT, ERZINCAN, TURKEY
Korkmaz, Mustafa; Karakus, Sinem
A list of medicinal plants used by local people in Uzumlu district and its villages is presented. This study included the first detailed ethnobotanical survey carried out in Erzincan. The study was conducted during spring and summer periods in 2010 and 2011 through face-to-face interview method to determine the local names, used parts, and medicinal usages of the determined plants. The plant samples collected from the study area were pressed, dried, and labeled according to the herbarium techniques, and identified. Totally 64 plant taxa belonging to 53 genera and 29 families were used by local people for different medicinal purposes in the area. The families including the highest number of taxa were Rosaceae (11 species), Asteraceae (6 species) and Lamiaceae (5 species). The species with the highest number of usage as herbal medicine were Urtica dioica, Anthemis cretica subsp. iberica, Petroselinum crispum, Allium cepa, Rheum ribes, Rosa dumalis subsp. boissieri var. boissieri and Vitis vinifera. Fruits and flowers were the most widely used parts of the plants. Decoction was the main method for using, and the primary therapeutic use of herbal remedies was for the respiratory system diseases such as cold, cough, asthma, and bronchitis. This study was the first carried out on 20 plant taxa used as traditional medicine, and the use of 28 taxa were recorded for the first time in Turkey. For maintaining the knowledge on traditional medicine, urgent studies should be carried out for recording before they have been completely lost
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