Sefa gün | ORDU UNIVERSITY (original) (raw)

Papers by Sefa gün

Research paper thumbnail of Vazo Ömrü Süresince Narcissus Tazetta L.'nın Bazı Parametreleri Üzerine Salisili

Journal of the Agricultural Faculty of Gaziosmanpaşa University, 2020

Research paper thumbnail of Effects of salicylic acid and citric acid treatments on some parameters of Narcissus tazetta L. during vase life

This study aimed to assess the effect of salicylic and citric acid applications on the vase life,... more This study aimed to assess the effect of salicylic and citric acid applications on the vase life, relative fresh weight, water uptake, bud opening change and total water uptake of cut narcissus. In the research, flowers were harvested at the unbloom goose-neck stage. As applications, purified water (T1control), 300 ppm (T2) and 150 ppm (T3) salicylic acid, 150 ppm (T4) and 50 ppm (T5) citric acid were determined. In the research, vase life, bud opening change, water uptake and total water uptake were found to be higher in T5 application compared to other applications. It was observed that T2 application was more effective in increasing the relative fresh weight as 112%. The highest doses of growth regulators caused damage at the bottom of flower stems. As a result, it was found that treatments applied in low doses as 150 ppm salicylic acid and 50 ppm citric acid on the investigated parameters of Narcissus tazetta flower were more effective.

Research paper thumbnail of Hünnap Meyvesinin (ziziphus jujuba mill.) Soğukta Muhafaza Performansı Üzerine Farklı Olgunluk Safhası ve Modifiye Atmosfer Paketlemenin (map) Etkisi

Research paper thumbnail of Effects of aminoethoxyvinylglycine (AVG) and Aloe vera treatments on cold storage and shelf life of Piraziz apple

Research paper thumbnail of The relationship between fruit color and fruit quality of sweet cherry (Prunus avium L. cv. ‘0900 Ziraat’)

The study was carried out to determine the relationship between fruit color on the fruit quality ... more The study was carried out to determine the relationship between fruit color on the fruit quality and bioactive compounds of sweet cherry. The highest mass, width and length of fruit were obtained when harvested in CTIFL 2, whereas the lowest values were recorded in CTIFL 6. With the increase in color intensity, the softening in fruit occurred. The firmness of CTIFL 6 was about half of the CTIFL 2. With the darkening of the color, SSC significantly increased in fruit. The highest SSC value was determined in CTIFL 6, but the lowest SSC was recorded in CTIFL 2. The fruit of CTIFL 3, had significantly higher vitamin C than the other fruit. The lowest vitamin C was measured in CTIFL 2. The fruit of CTIFL 4-6 had higher total phenolics and total flavonoids content than other color levels. In both DPPH and FRAP assays, the highest antioxidant activity was measured in CTIFL 6, whereas the lowest was determined in CTIFL 2. The effect on color levels of phenolic compounds was significant. ...

Research paper thumbnail of Combined Treatments of Modified Atmosphere Packaging with Aminoethoxyvinylglycine Maintained Fruit Quality in Sweet Cherry Throughout Cold Storage and Shelf Life

Acta Scientiarum Polonorum Hortorum Cultus

The effects of combined aminoethoxyvinylglycine (AVG) and modified atmosphere packaging (MAP) tre... more The effects of combined aminoethoxyvinylglycine (AVG) and modified atmosphere packaging (MAP) treatments on quality attributes of ‘0900 Ziraat’ sweet cherry fruit during the cold storage and shelf life were investigated in this study. Significantly lower weight loss and decay ratios were observed in all treatments throughout the cold storage period as compared to the control. A similar case was also observed referring to the shelf life. MAP treatments were found to be more effective in retarding the weight loss and decay ratio. Higher hue angle values were measured from AVG-treated fruit at harvest. Similarly, hue angle of AVG and MAP-treated fruit were also higher than for the control in all periods of cold storage and on the 7th and 21st day of shelf life. AVG-treated fruit had higher firmness values than the control at harvest. However, higher firmness values were measured from MAP-treated fruit during the cold storage and shelf life. At the end of cold storage, lower SSC and hig...

Research paper thumbnail of AVG uygulamalarının bazı fındık çeşitlerinde erkek ve dişi çiçeklenme süresi ile çiçek tozu kalitesi üzerine etkisi

Akademik Ziraat Dergisi

Bu çalışma 2016 ile 2018 yılları arasında Fındık Araştırma Enstitüsü deneme bahçelerinde yürütülm... more Bu çalışma 2016 ile 2018 yılları arasında Fındık Araştırma Enstitüsü deneme bahçelerinde yürütülmüştür. Çalışmada farklı konsantrasyonlardaki AVG uygulamalarının Tombul, Kalınkara ve Sivri fındık çeşitlerinde erkek ve dişi çiçeklenme süresi ve çiçek tozu kalitesine etkileri araştırılmıştır. AVG, ağaçlara erkek organlardan polen salınımının başlamasında önce 0 (kontrol), 75 (AVG1), 150 (AVG2) ve 225 (AVG3) mgL-1 konsantrasyonlarında püskürtülmüştür. Uygulamaların çiçek tozu canlılık oranlarını artırdığı belirlenmiştir. 2017 yılında en yüksek çiçek tozu canlılık oranı Tombul (%82.9) ve Kalınkara (%85.6) çeşitlerinde AVG2 uygulamasında; Sivri çeşidinde ise AVG1 uygulamasında (%75.8) tespit edilmiştir. 2018 yılında ise çiçek tozu canlılık oranı Tombul çeşidinde en yüksek AVG3 uygulamasında (%56.9); Sivri (%42.8) ve Kalınkara (%51) çeşitlerinde ise AVG2 uygulamasında saptanmıştır. Yinelemeli AVG uygulamasında 75 mgL-1 konsantrasyonunda bile çiçek tozu çimlenme oranının arttığı tespit edilmiştir. Uygulamaların erkek çiçeklenme süresine etkisi sadece Tombul çeşidinde olmuş ve 225 mgL-1 uygulamasının daha etkili olduğu gözlemlenmiştir. Uygulamaların dişi çiçeklenme üzerine etkisi sınırlı olmuş, yaprak açım zamanına etkisi ise tespit edilememiştir. Anahtar kelimeler: Corylus avellana, çiçek tozu çimlenme, çiçek tozu canlılığı, trifenil tetrazolyum klorit Effect of AVG applications on male and female flowering time and pollen quality in some hazelnut cultivars

Research paper thumbnail of Maintaining postharvest quality of medlar (Mespilus germanica) fruit using modified atmosphere packaging and methyl jasmonate

Scientia Horticulturae, 2019

The study was aimed to assess the effect of methyl jasmonate (MeJA) and modified atmosphere packa... more The study was aimed to assess the effect of methyl jasmonate (MeJA) and modified atmosphere packaging (MAP) on postharvest biochemical changes and quality loss in medlar fruit (Mespilus germanica cv. 'İstanbul'). Fruit were kept at 0 ± 0.5 °C and 90 ± 5% RH for 60 d. At the end of storage, as compared with the control, the weight loss, respiration rate and flesh firmness were lower in MAP-treated fruit. The SSC and vitamin C were lower in MAP-treated fruit than the control. The losses of total phenols, total flavonoid and antioxidant activity were significantly delayed by MAP during the storage. At the end of storage, the losses of oxalic acid, ascorbic acid and citric acid were delayed significantly only with the MeJA + MAP as compared with the control; and the losses of malic acid and fumaric acid were also delayed with both MAP and MeJA + MAP. The content of gallic acid, protocatechuic acid, ferulic acid, caffeic acid, quercetin and chlorogenic acid was higher in MeJA + MAP than the control. As a result, MeJA and MAP treatments could be used as an effective tool for delaying quality loss and maintaining of bioactive compounds in medlar fruit during cold storage.

Research paper thumbnail of Cracking and quality attributes of jujube fruits as affected by covering and pre-harvest Parka and GA3 treatments

Scientia Horticulturae, 2018

This study was carried out to investigate the effects of rain protective covering (RPC) together ... more This study was carried out to investigate the effects of rain protective covering (RPC) together with Parka and gibberellic acid (GA3) treatments on cracking rates and quality attributes of jujube fruits. RPC was mounted 5 weeks before the commercial harvest date. 1% Parka (containing 7.5% stearic acid, 5% cellulose and 1% calcium) and GA3 (15 mg L−1) were sprayed to experimental trees 3 and 2 weeks before the commercial harvest date. As compared to the control, all treatments (Parka, GA3 and GA3+Parka) yielded lower cracking rates. Cracking rates were also significantly lower in covered trees than in uncovered trees. However, GA3+Parka treated fruit had significantly lower cracking rates than both the control and the other treatments. GA3 treated fruits had significantly higher weight, width, hue angle and firmness values, but significantly lower L* values than the control fruits. As compared to the control, all treatments yielded a significantly lower respiration rate and soluble solids content, but higher titratable acidity, vitamin C and total phenolics. The covered fruits had significantly higher hue angle, respiration rate, vitamin C, total phenolics, total flavonoids and antioxidant activity (free radical scavenging activity on DPPH and FRAP) than the uncovered ones. It was concluded based on the present findings that rain-protective covering could be used as an efficient tool to reduce cracking rates in jujube fruits without any negative effects on the other quality attributes. It was also concluded that Parka and GA3 treatments reduced cracking rates significantly and such a reduction was more remarkable with combined GA3+Parka treatments.

Research paper thumbnail of Vazo Ömrü Süresince Narcissus Tazetta L.'nın Bazı Parametreleri Üzerine Salisili

Journal of the Agricultural Faculty of Gaziosmanpaşa University, 2020

Research paper thumbnail of Effects of salicylic acid and citric acid treatments on some parameters of Narcissus tazetta L. during vase life

This study aimed to assess the effect of salicylic and citric acid applications on the vase life,... more This study aimed to assess the effect of salicylic and citric acid applications on the vase life, relative fresh weight, water uptake, bud opening change and total water uptake of cut narcissus. In the research, flowers were harvested at the unbloom goose-neck stage. As applications, purified water (T1control), 300 ppm (T2) and 150 ppm (T3) salicylic acid, 150 ppm (T4) and 50 ppm (T5) citric acid were determined. In the research, vase life, bud opening change, water uptake and total water uptake were found to be higher in T5 application compared to other applications. It was observed that T2 application was more effective in increasing the relative fresh weight as 112%. The highest doses of growth regulators caused damage at the bottom of flower stems. As a result, it was found that treatments applied in low doses as 150 ppm salicylic acid and 50 ppm citric acid on the investigated parameters of Narcissus tazetta flower were more effective.

Research paper thumbnail of Hünnap Meyvesinin (ziziphus jujuba mill.) Soğukta Muhafaza Performansı Üzerine Farklı Olgunluk Safhası ve Modifiye Atmosfer Paketlemenin (map) Etkisi

Research paper thumbnail of Effects of aminoethoxyvinylglycine (AVG) and Aloe vera treatments on cold storage and shelf life of Piraziz apple

Research paper thumbnail of The relationship between fruit color and fruit quality of sweet cherry (Prunus avium L. cv. ‘0900 Ziraat’)

The study was carried out to determine the relationship between fruit color on the fruit quality ... more The study was carried out to determine the relationship between fruit color on the fruit quality and bioactive compounds of sweet cherry. The highest mass, width and length of fruit were obtained when harvested in CTIFL 2, whereas the lowest values were recorded in CTIFL 6. With the increase in color intensity, the softening in fruit occurred. The firmness of CTIFL 6 was about half of the CTIFL 2. With the darkening of the color, SSC significantly increased in fruit. The highest SSC value was determined in CTIFL 6, but the lowest SSC was recorded in CTIFL 2. The fruit of CTIFL 3, had significantly higher vitamin C than the other fruit. The lowest vitamin C was measured in CTIFL 2. The fruit of CTIFL 4-6 had higher total phenolics and total flavonoids content than other color levels. In both DPPH and FRAP assays, the highest antioxidant activity was measured in CTIFL 6, whereas the lowest was determined in CTIFL 2. The effect on color levels of phenolic compounds was significant. ...

Research paper thumbnail of Combined Treatments of Modified Atmosphere Packaging with Aminoethoxyvinylglycine Maintained Fruit Quality in Sweet Cherry Throughout Cold Storage and Shelf Life

Acta Scientiarum Polonorum Hortorum Cultus

The effects of combined aminoethoxyvinylglycine (AVG) and modified atmosphere packaging (MAP) tre... more The effects of combined aminoethoxyvinylglycine (AVG) and modified atmosphere packaging (MAP) treatments on quality attributes of ‘0900 Ziraat’ sweet cherry fruit during the cold storage and shelf life were investigated in this study. Significantly lower weight loss and decay ratios were observed in all treatments throughout the cold storage period as compared to the control. A similar case was also observed referring to the shelf life. MAP treatments were found to be more effective in retarding the weight loss and decay ratio. Higher hue angle values were measured from AVG-treated fruit at harvest. Similarly, hue angle of AVG and MAP-treated fruit were also higher than for the control in all periods of cold storage and on the 7th and 21st day of shelf life. AVG-treated fruit had higher firmness values than the control at harvest. However, higher firmness values were measured from MAP-treated fruit during the cold storage and shelf life. At the end of cold storage, lower SSC and hig...

Research paper thumbnail of AVG uygulamalarının bazı fındık çeşitlerinde erkek ve dişi çiçeklenme süresi ile çiçek tozu kalitesi üzerine etkisi

Akademik Ziraat Dergisi

Bu çalışma 2016 ile 2018 yılları arasında Fındık Araştırma Enstitüsü deneme bahçelerinde yürütülm... more Bu çalışma 2016 ile 2018 yılları arasında Fındık Araştırma Enstitüsü deneme bahçelerinde yürütülmüştür. Çalışmada farklı konsantrasyonlardaki AVG uygulamalarının Tombul, Kalınkara ve Sivri fındık çeşitlerinde erkek ve dişi çiçeklenme süresi ve çiçek tozu kalitesine etkileri araştırılmıştır. AVG, ağaçlara erkek organlardan polen salınımının başlamasında önce 0 (kontrol), 75 (AVG1), 150 (AVG2) ve 225 (AVG3) mgL-1 konsantrasyonlarında püskürtülmüştür. Uygulamaların çiçek tozu canlılık oranlarını artırdığı belirlenmiştir. 2017 yılında en yüksek çiçek tozu canlılık oranı Tombul (%82.9) ve Kalınkara (%85.6) çeşitlerinde AVG2 uygulamasında; Sivri çeşidinde ise AVG1 uygulamasında (%75.8) tespit edilmiştir. 2018 yılında ise çiçek tozu canlılık oranı Tombul çeşidinde en yüksek AVG3 uygulamasında (%56.9); Sivri (%42.8) ve Kalınkara (%51) çeşitlerinde ise AVG2 uygulamasında saptanmıştır. Yinelemeli AVG uygulamasında 75 mgL-1 konsantrasyonunda bile çiçek tozu çimlenme oranının arttığı tespit edilmiştir. Uygulamaların erkek çiçeklenme süresine etkisi sadece Tombul çeşidinde olmuş ve 225 mgL-1 uygulamasının daha etkili olduğu gözlemlenmiştir. Uygulamaların dişi çiçeklenme üzerine etkisi sınırlı olmuş, yaprak açım zamanına etkisi ise tespit edilememiştir. Anahtar kelimeler: Corylus avellana, çiçek tozu çimlenme, çiçek tozu canlılığı, trifenil tetrazolyum klorit Effect of AVG applications on male and female flowering time and pollen quality in some hazelnut cultivars

Research paper thumbnail of Maintaining postharvest quality of medlar (Mespilus germanica) fruit using modified atmosphere packaging and methyl jasmonate

Scientia Horticulturae, 2019

The study was aimed to assess the effect of methyl jasmonate (MeJA) and modified atmosphere packa... more The study was aimed to assess the effect of methyl jasmonate (MeJA) and modified atmosphere packaging (MAP) on postharvest biochemical changes and quality loss in medlar fruit (Mespilus germanica cv. 'İstanbul'). Fruit were kept at 0 ± 0.5 °C and 90 ± 5% RH for 60 d. At the end of storage, as compared with the control, the weight loss, respiration rate and flesh firmness were lower in MAP-treated fruit. The SSC and vitamin C were lower in MAP-treated fruit than the control. The losses of total phenols, total flavonoid and antioxidant activity were significantly delayed by MAP during the storage. At the end of storage, the losses of oxalic acid, ascorbic acid and citric acid were delayed significantly only with the MeJA + MAP as compared with the control; and the losses of malic acid and fumaric acid were also delayed with both MAP and MeJA + MAP. The content of gallic acid, protocatechuic acid, ferulic acid, caffeic acid, quercetin and chlorogenic acid was higher in MeJA + MAP than the control. As a result, MeJA and MAP treatments could be used as an effective tool for delaying quality loss and maintaining of bioactive compounds in medlar fruit during cold storage.

Research paper thumbnail of Cracking and quality attributes of jujube fruits as affected by covering and pre-harvest Parka and GA3 treatments

Scientia Horticulturae, 2018

This study was carried out to investigate the effects of rain protective covering (RPC) together ... more This study was carried out to investigate the effects of rain protective covering (RPC) together with Parka and gibberellic acid (GA3) treatments on cracking rates and quality attributes of jujube fruits. RPC was mounted 5 weeks before the commercial harvest date. 1% Parka (containing 7.5% stearic acid, 5% cellulose and 1% calcium) and GA3 (15 mg L−1) were sprayed to experimental trees 3 and 2 weeks before the commercial harvest date. As compared to the control, all treatments (Parka, GA3 and GA3+Parka) yielded lower cracking rates. Cracking rates were also significantly lower in covered trees than in uncovered trees. However, GA3+Parka treated fruit had significantly lower cracking rates than both the control and the other treatments. GA3 treated fruits had significantly higher weight, width, hue angle and firmness values, but significantly lower L* values than the control fruits. As compared to the control, all treatments yielded a significantly lower respiration rate and soluble solids content, but higher titratable acidity, vitamin C and total phenolics. The covered fruits had significantly higher hue angle, respiration rate, vitamin C, total phenolics, total flavonoids and antioxidant activity (free radical scavenging activity on DPPH and FRAP) than the uncovered ones. It was concluded based on the present findings that rain-protective covering could be used as an efficient tool to reduce cracking rates in jujube fruits without any negative effects on the other quality attributes. It was also concluded that Parka and GA3 treatments reduced cracking rates significantly and such a reduction was more remarkable with combined GA3+Parka treatments.