Browsing by Author "Gundogdu, Muttalip"

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Alterations in Quality Characteristics and Bioactive Compounds of Blackberry Fruits Subjected To Postharvest Salicylic Acid Treatment During Cold Storage
(Wiley, 2024) Sakaldas, Mustafa; Sen, Fatih; Gundogdu, Muttalip; Aglar, Erdal
Blackberry deteriorates rapidly after harvest due to its sensitive structure, limiting their storage time to about a week and resulting in significant economic losses. The study was conducted to determine the effects of salicylic acid applications on postharvest fruit quality in blackberries, the harvested fruit was immersed in salicylic acid solutions prepared at concentrations of 0.5, 1, and 1.5 mM for 15 min. Measurements and analyses such as weight loss, decay rate, soluble solids contents (SSC), pH, acidity, respiration rate, vitamin C, organic acids, and phenolic compounds were performed on fruits stored for 12 days with intervals of 4 days. Applying salicylic acid to fruits resulted in significantly less weight loss and decay rate. Salicylic acid application was effective in increasing SSC rate and decreasing titratable acidity with increasing storage time, and lower SSC and higher titratable acidity were measured with this application. Salicylic acid maintained organic acids and vitamin C postharvest. The decreases in individual phenolic compound levels occurred with extended storage time. Salicylic acid application generally was effective in maintaining concentrations of phenolic compounds during storage, and it was found to be effective on fruit quality, with effectiveness varying depending on application dosage. The study identified 1.5 mM as the most effective dosage of salicylic acid, which could be utilized to maintain postharvest quality and extend cold storage in blackberries. A study was conducted to assess the effects of salicylic acid on postharvest blackberry quality. Measurements such as weight loss, decay rate, soluble solids contents, pH, titratable acidity, respiration rate, vitamin C, organic acids, and phenolic compounds were taken over 12 days at 4-day intervals. Salicylic acid-treated fruits showed significantly less weight loss and decay. It also helped maintain organic acids, vitamin C, and phenolic compounds.image
Antioxidant Capacity and Bioactive Contents of Mulberry Species From Eastern Anatolia Region of Turkey
(Assoc Pharmaceutical Teachers india, 2018) Gundogdu, Muttalip; Tuncturk, Murat; Berk, Selma; Sekeroglu, Nazim; Gezici, Sevgi
In this study, we aimed to determine biochemical contents of white (Morus alba L.) and black (Morus nigra L.) mulberry genotypes grown in the Hakkari region. At the end of the study, organic acids, phenolic compounds, sugars, vitamin C and antioxidant capacities of mulberry species were determined. Black mulberry genotypes were found to contain higher antioxidant capacity than white mulberry genotypes. The highest antioxidant capacity was detected in the 30YK03 (25.55 mu moITE/g) black mulberry genotype. While phenolic compounds varied in mulberry species, especially gallic acid (57.78 mg/100g), chlorogenic acid (53.13 mg/100g), and rutin (37.77 mg/100g) had the highest values. Malic acid was found to be higher than other organic acids and was found to be 13.51 g/100g in the highest 30HK03 genotype. Although sugar contents varied in mulberry species, glucose was determined higher than fructose and sucrose in mulberries.
Bioactive Components and Antioxidant Capacities of Different Miniature Tomato Cultivars Grown by Altered Fertilizer Applications
(Springer, 2018) Erdinc, Ceknas; Ekincialp, Aytekin; Gundogdu, Muttalip; Eser, Fuat; Sensoy, Suat
This study investigated the organic acid and phenolic compound levels, total phenolic (TP) and antioxidant capacity (TEAC) of three miniature tomato cultivars grown on a farmer's field with three different fertilizer applications. Analysis of phenolic compound (protocatechuic, vanillic, gallic, chlorogenic, caffeic, syringic, p-coumaric and ferulic acid, rutin, quercetin, catechin and phloridzine) organic acid (citric, tartaric, malic, succinic and fumaric acid), TP and TEAC levels in fruit samples showed statistically significant (p < 0.05) differences between tomato cultivars and fertilizer applications. Rutin and chlorogenic acid were the predominant phenolic compounds found in all three cultivars. The highest rutin value (50.48 mg kg(-1) FW) was found in the Black Zebra fertilized with DAP plus organic and biochemical fertilizers and the lowest (20.52 mg kg(-1) FW) in the Black Zebra fertilized with DAP only. The highest chlorogenic acid value (63.31 mg kg(-1) FW) was found in the sweet pea currant fertilized with DAP only and the lowest (21.06 mg kg(-1) FW) in the Black Zebra fertilized with DAP plus chemical fertilizer. Citric acid content was the dominant organic acid in all three cultivars, with the highest citric acid value (6439.50 mg kg(-1) FW) found in the Sweet Pea Currant cherry tomato fertilized with DAP plus organic and biochemical fertilizers and the lowest (2435.20 mg kg(-1) FW) in the Window Box Yellow fertilized with DAP plus chemical fertilizer. Total phenolic and antioxidant levels in the window box yellow were significantly lower as compared to the Black Zebra and sweet pea currant varieties for all three fertilizer applications.
Cadmium Toxicity Affects Chlorophyll a and B Content, Antioxidant Enzyme Activities and Mineral Nutrient Accumulation in Strawberry
(Soc Biolgia Chile, 2015) Muradoglu, Ferhad; Gundogdu, Muttalip; Ercisli, Sezai; Encu, Tarik; Balta, Fikri; Jaafar, Hawa Z. E.; Zia-Ul-Haq, Muhammad
Background: Cadmium (Cd) is well known as one of the most toxic metals affecting the environment and can severely restrict plant growth and development. In this study, Cd toxicities were studied in strawberry cv. Camarosa using pot experiment. Chlorophyll and malondialdehyde (MDA) contents, catalase (CAT), superoxide dismutase (SOD), ascorbate peroxidase (APX) activities and mineral nutrient concentrations were investigated in both roots and leaves of strawberry plant after exposure Cd. Results: Cd content in both roots and leaves was increased with the application of increasing concentrations of Cd. We found higher Cd concentration in roots rather than in leaves. Chlorophyll a and b was decreased in leaves but MDA significantly increased under increased Cd concentration treatments in both roots and leaves. SOD and CAT activities was also increased with the increase Cd concentrations. K, Mn and Mg concentrations were found higher in leaves than roots under Cd stress. In general, increased Cd treatments increased K, Mg, Fe, Ca, Cu and Zn concentration in both roots and leaves. Excessive Cd treatments reduced chlorophyll contents, increased antioxidant enzyme activities and changes in plant nutrition concentrations in both roots and leaves. Conclusion: The results presented in this work suggested that Cd treatments have negative effect on chlorophyll content and nearly decreased 30% of plant growth in strawberry. Strawberry roots accumulated higher Cd than leaves. We found that MDA and antioxidant enzyme (CAT, SOD and APX) contents may have considered a good indicator in determining Cd tolerance in strawberry plant.
Characterization of Pomegranate Genetic Resources in Southeastern Anatolia, Turkey, With an Emphasis on Sugar and Organic Acid Profiles
(Springer india, 2025) Polat, Yakup; Akbari, Azam; Celik, Ferit; Kafkas, Nesibe Ebru; Gundogdu, Muttalip
Pomegranate (Punica granatum L.) is an ancient fruit cultivated in Anatolia, rich in genetic diversity. This study characterizes 17 promising pomegranate genotypes from the Southeastern Anatolia region of Turkey, focusing on their physicochemical properties, sugar, and organic acid profiles. The genotypes showed significant variation in fruit weight (211-498 gr), grain yield (52.5-75.0%), and juice yield (37.4-58.4 w/v). Total soluble solids (TSS) ranged from 13.1 to 16.9 degrees Brix and titratable acidity from 0.28 to 2.58%. The total phenolic content varied between 43.3 and 224 mg GAE/100 g, while antioxidant activity ranged from 58.9 to 86.6% DPPH inhibition. Anthocyanin content ranged from 0.04 to 19.8 mg cyanidin-3-glucoside equivalent/L. Fructose was the predominant sugar in all genotypes, followed by glucose and xylose. The genotype 63 HAL 26 had the highest levels of glucose, fructose, and total sugars. Citric acid was the dominant organic acid in all genotypes, with 63 HAL 03 having the highest organic acid content. Additionally, 63 HAL 25 exhibited the highest vitamin C content among the genotypes. Genotypes such as 63 HAL 28, 63 HAL 29, 63 HAL 35, 63 SUR 54, 63 SUR 56, and 63 SUR 65 are particularly suited for fruit juice production due to their high juice content and balanced sweet-sour flavor. These findings provide valuable insights for breeding programs and highlight the potential applications of specific genotypes in the food and nutraceutical industries.
Determination of Organics, Phenolics, Sugars and Vitamin C Contents of Some Cherry Cultivars (Prunus Avium)
(Friends Science Publ, 2012) Gundogdu, Muttalip; Bilge, Ugur
Organic acid, phenolic compound, sugar and vitamin C (L-ascorbic acid) contents of the standard Turkish cherry cultivar "0900 Ziraat" as well as the local cherry cultivars of "Beyrudi", "kisa sap" and "uzun sap" fruits were determined. Concerning organic acid contents in the examined cultivars, malic acid content was identified to be higher (13,914 g/kg in "kisa sap" local cultivar) than other organic acids. Gallic acid content was identified to be higher than the contents of other phenolic compounds and the highest amount was detected in "0900 Ziraat" cultivar (95,512 mg/100 g). Among the sugar types of fructose, glucose and sucrose, glucose was identified to be the dominant sugar in the examined cultivars and the highest amount was detected in local cultivar (215,907 g/kg). In terms of vitamin C content, the highest amount was detected in "kisa sap" local cultivar (11.448 mg/100 g). In addition, it was found statistically important differences among organic acid contents, phenolic contents, sugar and vitamin C in cherry cultivars. (c) 2012 Friends Science Publishers
Determination of Phenolic Compounds, Antioxidant Capacity and Organic Acids Contents of Prunus Domestica L., Prunus Cerasifera Ehrh. and Prunus Spinosa L. Fruits by Hplc
(Akademiai Kiado Rt, 2017) Celik, Ferit; Gundogdu, Muttalip; Alp, Sevket; Muradoglu, Ferhad; Ercisli, Sezai; Gecer, Mustafa Kenan; Canan, Ihsan
The important role of fruits in human health and nutrition has been better understood with the recent studies on biochemical contents of fruits having antioxidant properties. Being one of the similar studies, in this study, total antioxidant capacity (TAC), phenolic compound, organic acid, and vitamin C contents of three plum species (Prunus domestica L., Prunus cerasifera Ehrh., and Prunus spinosa L.) grown in Van locality (Turkey) were identified, and the correlation between the measured values was investigated. Phenolic compound, organic acid, and vitamin C contents were determined by high-performance liquid chromatography (HPLC) method. Analysis of phenolic compound indicated that chlorogenic acid was the predominant phenolic compound, and the highest value was measured in P. spinosa L. as 12.985 mg kg(-1). Malic acid was the predominant organic acids and the highest value was measured in P. spinosa L. as 1.245 g 100 g(-1). The highest TAC and vitamin C contents were also measured in P. spinosa L. as 1.021 mmol TE kg(-1) and 25.492 mg 100 g(-1), respectively. P. spinosa L. was found to be superior to the other two species with respect to antioxidant capacity and other biochemical contents. A significant (P <= 0.01) and positive correlation was reported between antioxidant capacity and vitamin C content.
Impact of Postharvest Putrescine Treatments on Phenolic Compounds, Antioxidant Capacity, Organic Acid Contents and Some Quality Characteristics of Fresh Fig Fruits During Cold Storage
(Mdpi, 2023) Kucuker, Emine; Aglar, Erdal; Sakaldas, Mustafa; Sen, Fatih; Gundogdu, Muttalip
The storage and shelf life of the fig, which has a sensitive fruit structure, is short, and this results in excessive economic losses. In a study carried out to contribute to the solution of this problem, the effect of postharvest putrescine application at different doses (0, 0.5, 1.0, 2.0, and 4.0 mM) on fruit quality characteristics and biochemical content during cold storage in figs was determined. At the end of the cold storage, the decay rate and weight loss in the fruit were in the ranges of 1.0-1.6% and 1.0-5.0 %, respectively. The decay rate and weight loss were lower in putrescine-applied fruit during cold storage. Putrescine application had a positive effect on the changes in fruit flesh firmness values. The SSC rate of fruit varied between 14 and 20%, while significant differences in the SSC rate occurred depending on storage time and putrescine application dose. With putrescine application, the decrease in the acidity rate of the fig fruit during cold storage was smaller. At the end of the cold storage, the acidity rate was between 1.5-2.5% and 1.0-5.0. Putrescine treatments affected total antioxidant activity values and changes occurred in total antioxidant activity depending on the application dose. In the study, it was observed that the amount of phenolic acid in fig fruit decreased during storage and putrescine doses prevented this decrease. Putrescine treatment affected the changes in the quantity of organic acids during cold storage, and this effect varied depending on the type of organic acid and the length of the cold storage period. As a result, it was revealed that putrescine treatments can be used as an effective method to maintain postharvest fruit quality in figs.
Influence of Lead Stress on Growth, Antioxidative Enzyme Activities and Ion Change in Root and Leaf of Strawberry
(Parlar Scientific Publications (p S P), 2016) Muradoglu, Ferhad; Encu, Tarik; Gundogdu, Muttalip; Canal, Sibel Boysan
Heavy metals are of widespread occurrence as consequences of human, agricultural and industrial activities. Among heavy metals, lead is a potential pollutant that can accumulate in different tissues organs and thus restrict plant growth. In this study, mechanisms of plant tolerances to lead stress were studied on strawberry (Camarosa cv.) using pot experiment with different Lead Pb(NO3)2 applications ranging from 0 to 80 mg kg-1 using soil culture. The accumulation of Pb2+ and its influence on chlorophyll and malondialdehyde (MDA) contents, activities of superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX) and ion concentrations were investigated in both root and leaves of strawberry plant. Despite severally decrease in the chlorophyll a and b contents, Pb2+ accumulation, MDA, SOD, and CAT activities were increased with the increase in the Pb2+concentrations both in roots and leaves. However APX activity was shown unsteady increase in roots and leaves. In the roots and leaves macro and micro ion concentrations were shown altered. While micro element concentrations decreased in contrary to macro element concentrations which were increased compare with control. These results indicate that lead stress cause reduction on growth and oxidative damage as shown by the decline in chlorophyll, increase in lipid peroxidase and antioxidant enzyme and alter levels of macro-micro ion concentrations.
Influence of Postharvest Putrescine Application on Respiration Rate and Physicochemical Properties of Tomato
(BMC, 2025) Alan, Ozlem; Gundogdu, Muttalip; Sen, Fatih; Aglar, Erdal
BackgroundTomato (Solanum lycopersicum L.) is a species of vegetable that is widely consumed worldwide and has high nutritional value. However, during storage, quality losses occur, especially water loss, decay, acidity loss and vitamin reduction. In this study, the effect of putrescine applications was investigated in order to reduce quality loss in tomatoes during storage. Putrescine is a compound belonging to the polyamine class and provides potential benefits such as delaying fruit ripening, reducing respiration rate and preserving quality. Putrescine solutions were prepared at concentrations of 0.5 mM, 1 mM and 1.5 mM, and sprayed homogeneously onto the surface of tomato fruit for 15-20 s, kept at room temperature and then placed in storage conditions.ResultsIn the study, the changes were observed in weight loss, decay rate, pH and titratable acidity rates in tomatoes as storage period increased. The weight loss rate increased up to 9.31%, putrescine applications reduced this loss to 4.24% especially with the highest dose of 1.5 mM. Putrescine was also effective in preventing fruit decay; at 1.5 mM dose, the decay rate decreased to 7.81%, while in the control group this rate was recorded as 8.76%. Putrescine applications also improved the content of organic acids and vitamin C. During storage, the decrease in organic acids slowed down and the loss of vitamin C remained at lower levels compared to the control group. In addition, putrescine applications maintained the acidic structure of the fruit by controlling the pH and titratable acidity. Respiration rate was kept low by putrescine, which delayed the fruit ripening process. All these findings show that putrescine maintains the fruit quality and extends the shelf life.ConclusionAs a result, putrescine applications play an important role in reducing quality losses during the storage period of tomatoes. Putrescine particularly prevents fruit weight loss, decay, organic acid loss and vitamin C reduction. It also delays the ripening process by slowing down the fruit respiration rate and maintains the nutritional value of the fruit. This study suggests that polyamines such as putrescine offer a potential treatment option for fruit preservation and shelf life extension. Putrescine applications can reduce economic losses by maintaining quality under storage conditions, especially for fruit such as tomatoes.
New Approaches in Fig Preservation: Use of Melatonin To Maintain Postharvest Quality of Fig (Ficus Carica L.) Fruit During Cold Storage
(Springer, 2023) Kucuker, Emine; Aglar, Erdal; Gundogdu, Muttalip; Tekin, Onur; Ogurlu, Ferhat; Ozcengiz, Ceyda Kizgin
The storage and shelf life of the fig, which has a sensitive fruit structure, is short, and this results in too much economic losses. In the study carried out to contribute to the solution of this problem, the effect of postharvest melatonin application at different doses (0, 0.10, 0.25, 0.50 and 1.00 mM) on fruit quality characteristics and biochemical content during cold storage was determined. The weight loss and decay rates that increased with the prolongation of the cold storage period were lower in melatonin-treated fig fruit. Melatonin application delayed fruit softening. The soluble solids content (SSC) ratio in melatonin treated-fruit was lower, and melatonin was effective on titratable acidity (TA), but there were inconsistencies in the effect. It can be said that the effect of melatonin application on the decreasing phenolic compounds during cold storage is limited. The significant differences occurred between applications in terms of antioxidant capacity at the end of the cold storage. The highest values were recorded with the control application and the lowest values with the application of 0.10 mM melatonin. The decrease in the amount of individual phenolic compounds both during and at the end of cold storage was lower with melatonin applications. Melatonin application had an effect on flavonoid compounds during cold storage, but this effect varied depending on melatonin concentration and compound. Melatonin application was effective in the changes in the amount of organic acids during cold storage, and this effect varied depending on the species of organic acid and cold storage time. In the study, it was concluded that melatonin application can be used to maintain postharvest quality in fig.
Organic Acids, Sugars, Vitamin C Content and Some Pomological Characteristics of Eleven Hawthorn Species (Crataegus Spp.) From Turkey
(Soc Biolgia Chile, 2014) Gundogdu, Muttalip; Ozrenk, Koray; Ercisli, Sezai; Kan, Tuncay; Kodad, Ossama; Hegedus, Attila
Background: The Hawthorn (Crateagus sp.) mostly occurs around the temperate region of the world with a high number of species, producing a fruit with numerous beneficial effects for human health. The aim of the study was to determine organic acid and sugar contents in the fruit of a number of hawthorn species grown in Erzincan province of Turkey. Results: Citric acid was the predominant organic acid in all hawthorn species and C. pseudoheterophylla had the highest citric acid content (23.688 g/100 g). There were not statistically significant differences among hawthorn species (except C. atrosanguinea Pojark) in terms of fumaric acid content. C. pontica C. Koch had a higher content of vitamin C (9.418 mg/100 g) compared to other species. Fructose was the predominant sugar component in all species and C. monogyna subsp. monogyna Joiq had the highest fructose content (18.378 g/100 g). Conclusions: The high fruit quality of the studied species indicates the importance of this fruit in human nutrition as a natural source. The study revealed that there were differences in terms of fruit characteristics among hawthorn species and thus better quality hawthorn genotypes can be selected within the species. Hence, this study is considered to be a valuable reference for forthcoming studies. The high fruit quality of the studied species indicates the importance of this fruit in human nutrition as a natural source.
Phenolic Compounds and Vitamins in Wild and Cultivated Apricot (Prunus Armeniaca L.) Fruits Grown in Irrigated and Dry Farming Conditions
(Soc Biolgia Chile, 2014) Kan, Tuncay; Gundogdu, Muttalip; Ercisli, Sezai; Muradoglu, Ferhad; Celik, Ferit; Gecer, Mustafa Kenan; Zia-Ul-Haq, Muhammad
Background: Turkey is the main apricot producer in the world and apricots have been produced under both dry and irrigated conditions in the country. In this study, phenolic compounds and vitamins in fruits of one wild (Zerdali) and three main apricot cultivars ('Cataloglu', 'Hacihaliloglu' and 'Kabaasi') grown in both dry and irrigated conditions in Malatya provinces in Turkey were investigated. Results: The findings indicated that higher content of phenolic compounds and vitamins was found in apricot fruits grown in irrigated conditions. Among the cultivars, 'Cataloglu' had the highest rutin contents both in irrigated and dry farming conditions as 2855 mu g in irrigated and 6952 mu g per 100 g dried weight base in dry conditions and the highest chlorogenic acid content in irrigated and dry farming conditions were measured in fruits of 'Hacihaliloglu' cultivar as 7542 mu g and 15251 mu g per 100 g dried weight base. Vitamin C contents in homogenates of fruit flesh and skin was found to be higher than beta-caroten, retinol, vitamin E and lycopen contents in apricot fruits both in irrigated and dry farming conditions. Conclusion: The results suggested that apricot fruits grown in both dry and irrigated conditions had high health benefits phytochemicals and phytochemical content varied among cultivars and irrigation conditions as well. However, more detailed biological and pharmacological studies are needed for the demonstration and clarification of health benefits of apricot fruits.
Physicochemical and Bioactive Characteristics of Wild Grown Bilberry (Vaccinium Myrtillus L.) Genotypes From Northeastern Turkey
(Univ Agr Sci & veterinary Med Cluj-napoca, 2018) Celik, Ferit; Bozhuyuk, Mehmet Ramazan; Ercisli, Sezai; Gundogdu, Muttalip
In the present study, fruit weight, fruit firmness, external fruit color, soluble solid content, pH, titratable acidity, vitamin C, total phenolics, total anthocyanins and antioxidant capacity of eight wild bilberry grown in Coruh valley in northeastern Turkey were determined. The blueberry cv. 'Bluecrop' was also studied to make comparison with bilberry genotypes. Antioxidant activity of bilberry and blueberry fruits were comparatively assessed by FRAP (Ferric reducing antioxidant power) assay. Significantly higher contents of phenolics and anthocyanins were found in bilberry fruits comparted with blueberry fruits. However, blueberry cv. 'Bluecrop' exhibited higher fruit weight and vitamin C content than bilberry fruits. Total phenolic and total anthocyanin content was 327 mg gallic acid equivalent and 142 mg of cyanidin-3-glucoside equivalent in 100 g fresh fruit in cv. 'Bluecrop', while it was between 492-563 mg gallic acid equaivalent and 307-342 mg of cyanidin-3-glucoside equivalent in 100 g fresh fruits of bilberry accessions. Moreover, wild accessions had approximately 2-3 folds higher antioxidant capacity than cv. 'Bluecrop'. The obtained results suggest the possibility of improving the bioactive and antioxidant properties of bilberry cultivars by using wild ones in cross breedings. It was also concluded that genotypes significantly affect the bioactive content of fruits and consequently the possibility of using wild bilberry fruits as a potential source of natural antioxidants in food industry is worth to be considered.
Physicochemical Substances and Bioactive Components of Wild Cornelian Cherry (Cornus Mas L.) Fruits in Erzincan Province of Eastern Turkey
(Serbian Genetics Soc, 2023) Ozrenk, Koray; Tas, Akgul; Gundogdu, Muttalip; Keskin, Nurhan; Ercisli, Sezai
Turkey has a very rich flora due to diverse climatic and topographic conditions within the country. Cornelian cherry (Cornus mas L.) is an important wild edible fruits and widely distributed in Turkey and well known for its fruit antioxidants and nutrients. In this study, phytochemical content in fruits of a number of Cornelian cherry genotypes in Erzincan region were determined. The biochemical analysis included organic acids, sugars, vitamin C, antioxidant and individual phenolic compounds. In the study, organic acid content was between 253.09 mg/100 g and 112.50 mg/100 g. Vitamin C content varied between 115.85 mg/100g and 43.77 mg/100 g. Likewise, the sugar content of Cornelian cherry fruits varied from 6.17 g/100 g to 4.06 g/100 g. When the antioxidant content was examined, the highest antioxidant was 980.91 limol TE/g fresh weight (FW) base and the lowest was 490.38 limol TE/g FW. In the genotypes examined, gallic acid was determined as the highest among the individual phenolic compounds, while the individual phenolic amounts ranged from 38.93 mg/100 g FW to 4.31 mg/100 g FW. As a result of the study, it was determined that Cornelian cherry fruits are very rich in vitamin C and other phytochemicals and as a result of this examination, 24ER04 and 24ER08 genotypes came to the fore.
Physiological Effects of Melatonin on Polyphenols, Phenolic Compounds, Organic Acids and Some Quality Properties of Peach Fruit During Cold Storage
(Springer, 2024) Kucuker, Emine; Gundogdu, Muttalip; Aglar, Erdal; Ogurlu, Ferhat; Arslan, Tuncer; Ozcengiz, Ceyda Kizgin; Tekin, Onur
In peach, which is a climacteric fruit species, the fruit deteriorates rapidly at post harvest with the increase in ethylene production and respiration rate during ripening, and significant changes occur in quality properties and antioxidant activity. In the study, the effect of melatonin applications at different doses (0, 0.10, 0.25, 0.50 and 1.00 mM) at postharvest on fruit quality characteristics and biochemical content during cold storage was determined. The increased weight loss and decay rate with the prolongation of the cold storage period were lower in melatonin-treated fruit and varied depending on the application concentration. Melatonin application was effective in maintaining fruit flesh firmness, but application concentration had no effect. An increase in soluble solids content (SSC) ratio and a decrease in acidity occurred during storage, and changes in SSC and titratable acidity ratios were lower with melatonin application. In general, melatonin application was effective in maintaining the concentration of organic acids, but this effect varied depending on the concentration and compound. As a result, it was concluded that 0.25 mM melatonin application can be used to maintain the postharvest fruit quality of peach.
Polyamines in Cold Storage: Impact of Postharvest Spermidine on Strawberry Quality
(Springer, 2024) Orman, Erdal; Yavic, Adnan; Gundogdu, Muttalip; Aglar, Erdal; Celik, Kenan; Kan, Tuncay
Reducing post-harvest losses of strawberries, which quickly spoil after harvest and have a limited storage life, is crucial in minimizing product wastage. The research aimed to investigate the impact of spermidine application at varying concentrations (0, 1.0, 1.5, and 2.0 mM) on post-harvest fruit quality characteristics and biochemical composition. Spermidine application protected the fruits by preventing changes in weight loss, decay rate, soluble solids content (SSC), titratable acidity (TA), pH ratios and respiration rate. Malic acid was dominant in strawberry fruits, and that the application of 2 mM spermidine (559.80 mg/100 g) compared to the control group (483.55 mg/100 g) largely preserved malic acid content. Chlorogenic acid was phenolics compound that had the highest content, and spermdine doses significantly preserved chlorogenic acid during storage. The study revealed that 2 mM spermidine application was the most effective dose and that it could be used at this concentration to preserve post-harvest fruit quality and reduce biochemical changes in strawberries.
Preserving Quality and Extending Shelf Life of Climacteric Persimmon Fruits Using Melatonin and Modified Atmosphere Packaging
(Wiley, 2025) Kucuker, Emine; Gundogdu, Muttalip; Guler, Emrah; Sumbul, Ahmet; Tekin, Onur; Hallac, Bulent
Quality and product losses during the postharvest storage of climacteric persimmon fruits pose significant challenges due to their short shelf life and limited marketing period. This study examined the effects of melatonin (1 mM) and modified atmosphere packaging (MAP) on preserving the quality, biochemical properties, and organic acid contents of persimmons, as well as extending their shelf life during storage at 0 degrees C +/- 0.5 degrees C. The MAP resulted in the lowest weight loss, recording only 6.63%. The combination of melatonin and MAP provided the highest fruit firmness at 8.69 kg/cm2, along with a total antioxidant level of 12.40 mu mol TE 100 g-1. Additionally, this treatment improved total phenolic content and most individual organic acids, except for fumaric acid, which was highest in the MAP treatment. The organic acid contents of the fruits varied during storage, depending on the specific acid. Malic acid was the predominant organic acid and was consistently better preserved by the treatments compared to the control. It is important to note that the reduction in malic acid was approximately 1.5 times less in the treated fruits than in the controls, while the decline of other organic acids was 3-4 times greater. In conclusion, both MAP and the combination of melatonin and MAP were effective methods for preserving the quality attributes and extending the shelf life of persimmon fruits.
Role of Polyamines in Post-Harvest Storage: Influence of Post-Harvest Putrescine Treatment on Quality Properties and Specific Biochemical Contents of Cornelian Cherry Fruit
(Elsevier, 2024) Tas, Akgul; Gundogdu, Muttalip; Berk, Selma; Kibar, Hakan; Uyak, Cuneyit
In this study, postharvest 0.3 mM, 0.5 mM and 1.0 mM putrescine doses were applied to cornelian cherry fruit, which is a climacteric fruit, and the fruit were stored for 45 days. Putrescine applications maintained fruit quality criteria by preventing changes in weight loss, soluble solids content (SSC), acidity and respiration rate. Putrescine 1.0 mM dose prevented the degradation of phenolic compounds, organic acids, and vitamin C contents in cornelian cherry fruit. In the application of 1.0 mM dose of putrescine (45 days), malic acid was determined as 64.07 g kg-1, vitamin C as 13.20 mg 100 g-1 and citric acid as 11.42 g kg-1. As a result of storage, it was observed that the most effective dose preventing the degradation of phenolic acids (chlorogenic acid 9.73 mg 100 g-1; ocoumaric acid 3.78 mg 100 g-1; ferulic acid 2.43 mg 100 g-1) was 1.0 mM putrescine application. The most effective doses on flavonoids were found to be 1.0 mM (rutin), 0.5 mM (catechin) and 0.3 mM (quercetin). As a result, it was concluded that the exogenous application of putrescine can be used as a post-harvest tool to preserve the quality and storage life of cornelian cherry fruit.
Stomata Size and Frequency in Some Walnut (Juglans Regia) Cultivars
(Friends Science Publ, 2011) Muradoglu, Ferhad; Gundogdu, Muttalip
This study compared the stomata frequency, stomata size, chlorophyll content and leaf characteristics (leaf length, width & leaf area) of 11 cultivars of walnuts. The stomata frequency, stomata size (stomata length and width) of all 11 cultivars were in the range 183-335 stomata/mm(2), 17.21-30.10 and 10.65-20.06 mu m, respectively. The stomatal frequency of Chandler was the largest and the stomata length and width of Fernor were the largest among all the walnuts cultivars. Chlorophyll and leaf characteristic were measured in same leaf, which were used for measured stomata frequency and size previously. The total chlorophyll and leaf area in all cultivars were in the range 0.34-2.37 mg/g and 26.77-86.92 cm(2). The largest chlorophyll content was measured in Pedro, while the largest leaf area was measured in Howard. Remarkable positive correlation was found among leaf characteristics and stomata frequency in walnut cultivars. (C) 2011 Friends Science Publishers