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    Determination of Morphological and Biochemical Responses of Some Cherry Rootstocks to Calcium Stress under In Vitro Conditions
    (2023) İpek, Muzaffer; Arıkan, Şeyma; Pırlak, Lütfi; Eşitken, Ahmet; Şahin, Murat
    High calcium content in the soil is an important abiotic stress factor that limits the yield and survival of plants. While calcareous soils cover more than 30% of the land worldwide, the soils in almost all regions of our country, except for the Black Sea region, have a high calcium content. Fruit species, including cherries, are generally highly sensitive to high calcium content. In this context, the presence of rootstocks that provide tolerance to high calcium content in fruit cultivation and the determination of the tolerance of existing rootstocks to calcium are of great importance. Therefore, this study aims to determine the morphological and biochemical responses of Mazzard, Mahaleb, MaxMa 14, CAP- 6P, and PHL-C rootstocks, which were propagated under in vitro conditions, to different levels of calcium (Control, 1.0%, 3.0%, and 5.0% CaCO3). Under stress conditions, in addition to morphological characteristics such as plant height, root development, leaf area, plant fresh and dry weight, leaf relative water content, and membrane permeability, biochemical characteristics such as catalase, peroxidase, superoxide dismutase, hydrogen peroxide, proline, and protein content, as well as iron activities (iron content in plants, active iron content, iron chelate reductase activity in plants, and iron chelate activity in roots) were determined in stressed plants. In the experiment, it was determined that as the CaCO3 level increased in the medium, the tolerance of the rootstocks decreased. However, measurements taken on the 15th day of the experiment revealed that the MaxMa-14 cherry rootstock showed better growth compared to other cherry rootstocks.
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    Öğe
    Effect of Bacterial Inoculation on Morphological and Pomological Characteristics of Three Strawberry (Fragaria x ananassa Duch.) Cultivars Under Cadmium Toxicity
    (2022) Şahin, Murat; Pırlak, Lütfi
    Cadmium (Cd) is one of the main elements that cause heavy metal pollution, which is one of the important types of environmental pollution. There is a constant quest to reduce or eliminate the effects of Cd pollution. Plant growth-promoting rhizobacteria (PGPR) is one of these possible solutions. PGPRs not only increase plant growth but also protect plants against organic and inorganic stresses. In this study, the effects of three different Pseudomonas strains (MS-7, MS-12, and MS-13) on morphological and pomological characteristics of three different strawberry cultivars (Rubygem, Kabarla, and YFL) exposed to three different Cd doses (0, 100 and 300 mg kg-1) were investigated to determine the effectiveness of PGPR against Cd toxicity in strawberry. To this end, root collar diameter (RCD), root length (RL), root fresh weight (RFW), root dry weight (RDW), shot fresh weight (SFW), shot dry weight (SDW), leaf area (LA), mean fruit weight (MFW), mean fruit length (MFL), and mean fruit diameter (MFD) were examined. It was observed that the effects of different Pseudomonas strains were cultivar-specific and affected some parameters more. Rubygem MS-7 bacterial strain preserved SDW (3.21 g) and MS-12 bacterial strain preserved RFW (13.01 g) at 300 mg kg-1 Cd dose significantly better against Cd toxicity than other bacterial strains. In Kabarla MS-7 bacterial strain preserved RDW (3.72 g) at 300 mg kg-1 Cd dose and MS-12 bacterial strain preserved SFW (15.27 g) at 100 mg kg-1 Cd dose significantly better against Cd toxicity than other bacterial strains. Likewise, in YFL, MS-13 bacterial strains preserved MFW (7.509 g) and RL (30.00 cm) at 300 mg kg-1 Cd dose, and MS-7 bacterial strain preserved LA (57.87 cm2) at 100 mg kg-1 Cd dose significantly better against Cd toxicity than other bacterial strains. The results of the study showed that formulations containing Pseudomonas sp. can be used as an agricultural improver in areas with heavy metal pollution. As a result of the study, it was observed that PGPR applications were effective in preserving the morphological and pomological characteristics that decreased with the increase in Cd dose.
  • Küçük Resim
    Öğe
    Öğretmen adaylarının girişimcilik düzeylerinin incelenmesi
    (Eğitim ve Öğretim Araştırmaları Dergisi, 2017) Memduhoğlu, Hasan Basri; Şahin, Murat
    Gelişen ve ihtiyaçları farklılaşan bir dünyada her alanda girişimci bireylere ihtiyaç duyulmaktadır. Girişimci bireyler toplumsal kalkınmanın sağlanmasında, istihdam sorunun çözülmesinde, toplumsal refahın artırılması ve rekabetin geliştirilmesinde önemli bir role sahiptirler. Geleceğin neslini yetiştiren öğretmenler ve öğretmenleri yetiştiren eğitim fakültelerinin girişimci bireyleri destekleme çalışmaları bu noktada büyük önem arz etmektedir. Eğitim Fakültelerinde öğrenim görmekte olan öğretmen adayı öğrencilerin girişimcilik düzeylerini etkileyen değişkenlerin tespit edilmesi ve bu yönde adımların atılması, daha girişimci öğretmenlerin topluma kazandırılmasına katkı sağlayacaktır. Bu bağlamda eğitim fakültesi öğrencilerinin girişimcilik düzeylerinin çeşitli değişkenler açısından belirlenmesi bu araştırmanın amacını oluşturmaktadır. Araştırmanın örneklem grubunu 2015-2016 eğitim-öğretim yılında Eğitim Fakültesinde öğrenim görmekte olan 415 öğretmen adayı oluşturmaktadır. Genel tarama modelindeki araştırmada veriler Yılmaz ve Sünbül (2009) tarafından geliştirilen “Üniversite Öğrencilerine Yönelik Girişimcilik Ölçeği” ile toplanmıştır. Araştırma sonunda yapılan analizlere göre öğretmen adaylarının yüksek girişimcilik düzeyinde oldukları görülmüştür. Öğretmen adaylarının girişimcilik düzeylerinin; cinsiyet, öğrenim görülen bölüm ve sınıf değişkenlerine göre farklılık göstermediği tespit edilmiştir.
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    Öğe
    The Effect of Mycorrhiza Applications on Growth and Yield in Some Strawberry Cultivars under Calcareous Soil Conditions
    (2023) Arıkan, Şeyma; İpek, Muzaffer; Pırlak, Lütfi; Eşitken, Ahmet; Şahin, Murat
    This study was conducted in the research and practices of greenhouses at the University of Selçuk, Faculty of Agriculture and Horticulture Department. The effects of three different mycorrhiza species and combinations of strawberry plants on plant growth and nutrition were investigated in three different strawberries cultivars. According to the results, it was determined that Glomus chlorodum mycorrhiza alone and in combination increased stem fresh and root fresh weights, leaf relative water content, number of stems, and number of leaves compared to control plants. However, no significant changes could be obtained with mycorrhizal applications on membrane permeability and chlorophyll values in all strawberry varieties used. Nutrient analysis of nitrogen, magnesium, iron, manganese, and boron in the leaves of the application of mycorrhiza with significant increases has been achieved. Glomus etunicatum + Glomus chlorodum and Glomus deserticola + Glomus etunicatum applications had the best results. As a result of this study, it can be suggested that Glomus etunicatum and Glomus chlorodum can be used to promote plant growth in strawberry calcareous soil conditions.