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    Determination of factors affecting sensitivity of two strawberry species to iron deficiency
    (WFL Publisher Ltd., 2013) Torun, Ayfer A.; Serce, Sedat; Kacar, Yildiz A.; Erdem, Nazife; Erdem, Halil; Bicen, Belgin; Tolay, Inci
    Iron (Fe) deficiency is an important nutritional problem occurring in plants and humans in the world. It is also common nutritional problem in Turkey and the strawberry is known as a sensitive species to Fe deficiency which results in significant yield and quality losses. The objective of this study was to determine the factors affecting the sensitivity of strawberry to Fe deficiency using BSP 14 (Fragaria chiloensis L.) and LH 30-4 (F. virginiana Miller) genotypes of the cultivated strawberry, F. ×ananassa Duch in hydroponic culture. In the study, the genotypes LH 30-4 and BSP 14 were selected as plant material. F. chiloensis and F. virginiana were determined as tolerant and sensitive to Fe deficiency in a previous screening study. The plants were grown in Fe (-) (0 ?mol Fe) and Fe (+) (100 ?mol Fe) nutrient culture and several variables were measured. The variables evaluated included symptom severity, SPAD values, shoot and root weight, Fe-reductase activity, shoot and root Fe content, Fe concentration and the pH value of the media. The results indicated that the most important factors affecting the Fe deficiency in strawberry species were the Fe uptake and the Fereductase activity.
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    Öğe
    Distribution of heavy metals in plant and media samples from a volcanic region in Hatay, Turkey
    (Parlar Scientific Publications (P S P), 2008) Demirkeser, Turan Hakan; Ozgen, Senay; Torun, Ayfer Alkan; Erdem, Halil; Gunduz, Kazim; Durgac, Coskun; Serce, Sedat
    There is a volcanic area in Hatay, Turkey with currently limited agricultural activities; however, its ecological properties make it a plausible choice for protected fruit and vegetable production. The different soil properties of the area might be useful for plant growing in the future. In this study, we determined selected plant nutrients and heavy metal concentrations of eight soil and rock types from the realon. along with those of ten different species of fruits and vegetables representing the region's flora and agricultural activities. We found significant differences in all the micronutrients and heavy metal concentrations among the media samples. Overall, the highest concentrations were recovered from growing media. For example, one medium had the highest concentrations of Cu, Cd and Zn. Similarly, the plant samples had significant differences in micronutrients and heavy metal concentrations. Almond leaf samples were in the highest mean groups for Mg, Na, Fe, Al and Cr, while cucumber had the highest values for Zn and Ni. The highest Pb levels were recovered from uncultivated olive. Comparisons of our results to those of others in the related literature indicated that only two of our results were above the accepted levels: the almond Fe and holy oak B concentrations. In conclusion, our samples from the volcanic area in Hatay were not dangerously contaminated with heavy metals, and utilization of this area for agricultural purposes poses no apparent threat.