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Horticultural Studies
Number of Followers: 0  
 
  Full-text available via subscription Subscription journal
ISSN (Print) 2717-882X
Published by Batı Akdeniz Tarımsal Araştırma Enstitüsü Homepage  [1 journal]
  • Alteration of Antioxidant Activity and Total Phenolic Content during the
           Eight-Week Fermentation of Apple Cider Vinegar

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      Authors: Havva Nilgün BUDAK
      Abstract: Apple is one of the delicious fruit consumed by people. Apple cider vinegar was made through the traditional method and the changes occurred during the 8 week fermentation period were determined in this research. Total titratable acidity, pH, total soluble solids (°brix), total phenolic contents, Oxygen Radical Absorbance Capacity (ORAC) and Trolox Equivalent Antioxidant Capacity (TEAC) assays, phenolic contents were determined. Total phenolic substance, ORAC and TEAC values increased significantly weekly and reached the highest level in the 3rd week. Total phenolic substance, ORAC and TEAC values of 3rd week apple vinegar were determined as 1110.63 mg GAE L-1, 10.92 mM and 21.11 µmol TE mL-1, respectively. Apple vinegar samples had gallic acid, catechin, epicatechin, chlorogenic acid, and p-coumaric acid. The major phenolic substances in apple vinegar were gallic acid and chlorogenic acid. While gallic acid value of 3rd and 4th week apple vinegar were detected 11.91 and 23.69 mg L-1, respectively; chlorogenic acid value of 4th and 5th week apple vinegar were found 46.36 and 49.71 mg L-1. Antioxidant activity and phenolic substances values were not significant reduction during the acetic acid fermentation. In this study, the formation process of the functional and sensory properties of apple cider vinegar due to the change in the weekly antioxidant and bioactive component content of apple cider vinegar was emphasized.
      PubDate: Tue, 01 Jun 2021 00:00:00 +030
       
  • The Effect of Antioxidants on Micropropagation of Avocado by Nodal
           Segments

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      Authors: Gizem GÜLER; Hamide GÜBBÜK, Mahmut Alper ARSLAN
      Abstract: Tissue culturing, which is an alternative method to clonal reproduction of avocado (Persea americana Mill.) has started to become widespread in recent years. However, the browning of tissue resulting from the oxidation of phenolic compounds is one of the most important factors limiting success in the in vitro reproduction of avocados. Therefore, in this study, the effects of different antioxidants (activated charcoal (AC), ascorbic acid (ASA), citric acid (CA) alone or in combination with each other on browning and regeneration of avocado shoots, grown under in vitro conditions, were investigated. In the study, MS (Murashige and Skoog) nutrient medium with 1 mg L-1 BAP, 0.1 mg L-1 GA3 and 3% sucrose was used in all treatments. Moreover, antioxidants alone or combined with each other with different concentrations were used in the nutrient media in all treatments except the control. As a result of the research, the lowest browning intensity and the highest survival rate values were shown in the application of 100 mg L-1 ascorbic acid (ASA) alone and in the combination of 60 mg L-1 ascorbic acid (ASA) and 40 mg L-1 citric acid (CA). Furthermore, maximum shoot length (2.8 cm) and maximum leaf number (6.4) in terms of survival rate of the explants, shoot length and number of leaves were determined in MS nutrient medium containing a combination of 60 mg L-1 ascorbic acid (ASA) and 40 mg L-1 citric acid (CA).
      PubDate: Tue, 01 Jun 2021 00:00:00 +030
       
  • Effects of Different Pollinators on Fruit Set and Quality Attributes of
           Texas Almond (Prunus dulcis L.) Cultivar

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      Authors: Mehmet YAMAN; Aydin UZUN
      Abstract: There is a positive relationship between pollination and fruit yield of almonds. Since self-incompatibility is a major problem in almond cultivars, foreign pollinators are generally used in almonds to get high yield and quality. This study was conducted to investigate the effects of different pollinators (inbreed hybrid combinations) on fruit set and pomological characteristics of Texas almond cultivar in 2018 - 2019 growing seasons. Fruit set ratios varied between 3.6% (Texas × A3) and 5.2% (Texas × A4) in the first year of the study and between 8.0% (Texas × A3) and 13.2% (Texas × A2) in the second year. As the average of two years, the lowest fruit length (32.03 ± 2.45 mm) was observed in Texas × A4 combination and the greatest fruit length (35.31 ± 3.05 mm) was observed in Texas × A1 combination, whereas fruit width values varied between 19.37 ± 2.43 mm and 23.79 ± 1.33 mm. Although pollinators influenced fruit mass values, the greatest value (5.73 ± 0.74 g) was observed in Texas × A3 combination. It was concluded based on present findings that use of A2 cultivar as a pollinator in almond orchards established with Texas cultivar may have positive effects on fruit set.
      PubDate: Tue, 01 Jun 2021 00:00:00 +030
       
  • Determination of Morphological and Physiological Changes of Ornamental
           Cabbage (Brassica oleracea var. acephala) against Boron Toxicity in
           Phytoremediation

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      Authors: Şenel Birceyudum EMAN GÖKSEVEN; Sevinç KIRAN, Şeküre Şebnem ELLİALTIOĞLU
      Abstract: Boron toxicity in agricultural lands limits plant breeding as a plant nutrition problem. Some plants are able to tolerate high levels of heavy metals at potentially toxic doses, accumulate them in their bodies and remove them from the soil. In this study, it was aimed to determine the morphological and physiological responses of ornamental cabbage in phytoremediation against boron toxicity. This study was conducted under controlled greenhouse conditions, 4 different boron doses (0, 10, 25, and 50 mg kg-1 B) were applied to 2 different soil structures (acidic (S1) and alkaline (S2) soils). Toxicity symptoms were appeared at 50 mg kg-1 B. At alkaline soil, plant weights and visual properties of plants were found to be low in quality. Results show that as the boron dose increased, shoot-root fresh and dry weight, stomatal conductance, chlorophyll content, relative water content (RWC) were decreased. Boron accumulation in the shoot, root and whole plant was at 50 mg kg-1 B. As a result, it is understood that ornamental cabbage used for decontamination of boron element by phytoremediation method for the first time in this study. We suggest that it has a potential to as hyper-accumulator plant for the remediation of boron-contaminated soil.
      PubDate: Tue, 01 Jun 2021 00:00:00 +030
       
  • Determination of Leaf Area of Some Vegetable Plants Grown under Greenhouse
           Condition by Non-Destructive Methods

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      Authors: Cihan KARACA; Dursun BÜYÜKTAŞ, Süleyman ŞEHİR
      Abstract: The use of a mathematical model approach, which is a non-destructive method to determine the leaf area, has been used safely in recent years. The most important reason for this is that the application is easy and the application cost is very low. The most important disadvantage of this method is that the derived models need calibration according to different crop varieties. In the study, firstly, the width (W) and length (L) measurements of each individual leaf taken from the crops were correlated with the actual area of the leaf and crop-specific models were developed. The actual area (LA) of each leaf used in the sampling was determined by the ImageJ software. In the study, 7 different models were derived for each crop species (1, LA=a+bL2+cL2/W2+dW2+eLW; 2, LA=a+bL2+cW2+dLW; 3, LA=a+bL2+cW2; 4, LA=aL2+bW2; 5, LA=aLb+cWd+e; 6, LA=a+bLW; 7, LA=aLW). The coefficients in the models were determined separately for each crop species. In order to evaluate the performance of the models, some performance criteria such as determination coefficient (R2) and root mean square error (RMSE), relative error (RE), mean bias error (MBE) and Willmott index (d) were used. In this study, leaf areas were estimated with high accuracy (R2=0.96 for tomato; R2=0.99 for pepper, eggplant and cucumber) with these models without using expensive measuring devices.
      PubDate: Tue, 01 Jun 2021 00:00:00 +030
       
  • Effects of Calcium Treatment on Physical and Biochemical Changes of
           Cold-Stored Sweet Cherry Fruit

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      Authors: Derya ERBAŞ; Mehmet Ali KOYUNCU
      Abstract: In the present study, sweet cherry fruit (Prunus avium cv. 0900 Ziraat) were dipped into calcium (Ca) gluconate (calcium concentration of 1.5%) and distilled water (as control). The treated fruit were stored at 1 ± 0.5°C and 90% relative humidity for 4 weeks in two different packages. At weekly intervals, weight loss, fruit firmness, colour changes, soluble solids content, titratable acidity, sensory analysis, total phenolic and anthocyanin content of fruit and total chlorophyll content of stem were evaluated. As a result, Ca treatment positively affected sweet cherry fruits by maintaining firmness and decreasing respiration rate of sweet cherry fruit. Moreover, Ca treatment generally delayed the skin browning, and maintained fruit quality. Stem chlorophyll decomposition was retarded with Ca throughout cold the storage. Considering the sensory analysis, storage life of fruit could be prolonged at least up to 1 week by Ca1 (treated Ca-Glu and stored in plastic box with lid) treatment compared to other treatments.
      PubDate: Tue, 01 Jun 2021 00:00:00 +030
       
  • Asymbiotic Germination and Seedling Development of Terrestrial Orchid
           Bletilla striata Using in vitro and ex vitro Cultures

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      Authors: Mehmet Uğur KAHRAMAN; Francis John CULLUM
      Abstract: Procedures for asymbiotic germination and seedling development under in vitro and ex vitro conditions were investigated for Bletilla striata. Five different asymbiotic germination media (½ P6668 ¬Phytamax Orchid Maintenance Media, ½ P6668 ¬Phytamax Orchid Maintenance Media with coconut water, P723 PhytoTechnology Orchid Seed Sowing Media, P723 PhytoTechnology Orchid Seed Sowing Media with coconut water, and ½ MS media) for in vitro culture and sphagnum moss for ex vitro culture were examined for their effectiveness for 8 weeks on seed germination and seedling development of B. striata. Germination occurred in all media, however, the best germination rate was obtained in P723 medium with coconut water while the lowest frequency was obtained in sphagnum moss. Moreover, the highest leaf parameters of the seedlings of B. striata developed in ½ MS medium when the seedlings in sphagnum moss showed the lowest results. Furthermore, all germinated protocorms showed rhizoid formation in all media.
      PubDate: Tue, 01 Jun 2021 00:00:00 +030
       
 
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