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ÇİNKO VE KADMİYUM METAL İYONLARININ PHASEOLUS VULGARISL. (FABACEAE) KÖK UCU HÜCRELERİ ÜZERİNE SİTOTOKSİK ETKİLERİ

THE CYTOTOXIC EFFECTS OF ZINC AND CADMIUM METAL IONS ON ROOT TIP CELLS OF PHASEOLUS VULGARIS L. (FABACEAE)

Journal Name:

  • Süleyman Demirel Üniversitesi Fen Dergisi

Publication Year:

  • 2009

Key Words:

Keywords (Original Language):

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
The present study was designed to evaluate the cytotoxic effects of different concentrations of zinc (Zn) and cadmium (Cd) heavy metal ions on root tip cells of Phaseolus vulgaris L. For this aim, we used the germination percentage, root lenght, weight gain and micronucleus (MN) frequency as indicators of cytotoxicity, and supported these data with statistical analysis. Additionally to the cytogenetic analysis, DNA analyses were performed from root tip meristem of P. vulgaris seeds treated with Zn and Cd. The test material was used the seeds of P. vulgaris.The seeds were divided into three groups: control, Zn and Cd treatment groups. They were treated with two dose levels (30 and 70 ppm) of Zn and Cd during 7 days. The initial and final weights of all seeds were measured by sensitive balance in order to investigate the effect of heavy metal ions on the weight gain of seeds. The results indicated that there was an alteration in the germination percentage, root lenght, weight gain and MN frequency depending on dose in seeds exposed to Zn and Cd ions when compared with control. Both doses of Zn and Cd ions significantly decreased the germination percentage, root lenght and weight gain in seeds all treatment groups. However, MN rate showed an increase. Besides, the investigated all these paremeters (except MN frequency) was higher in seeds exposed to Zn than seeds treated with Cd. In other words, Cd was more a toxic metal than Zn. In conclusion, Zn and Cd metal ions had important cytotoxic effects on P. vulgaris root tip cells and the parameters such as germination percentage, root lenght, weight gain and MN frequency can be used for biomonitoring of these effects.
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Abstract (Original Language): 
Bu çalışma Phaseolus vulgaris L. kök ucu hücreleri üzerine çinko (Zn) ve kadmiyum (Cd) ağır metal iyonlarının farklı konsantrasyonlarının sitotoksik etkilerini değerlendirmek için tasarlandı. Bu amaçla, çimlenme yüzdesi, kök uzunluğu, ağırlık kazanımı ve mikronukleus (MN) sıklığını sitotoksikitenin indikatörleri (belirteçleri) olarak kullanıldık ve bu verileri istatistiksel analizler ile gruba ayrıldı. 7 gün süresince Zn ve Cd'nin iki dozu ile muamele edildiler (30 ve 70 ppm). Tohumların ağırlık kazanımları üzerine ağır metal iyonlarının etkilerini araştırmak amacıyla, hassas terazi tarafından tüm tohumların başlangıç ve son ağırlıkları ölçüldü. Sonuçlar gösterdiki, kontrol grubu ile karşılaştırıldığında Zn ve Cd iyonlarına maruz kalan tohumlarda doza bağlı olarak çimlenme yüzdesi, kök uzunluğu, ağırlık kazanımı ve MN sıklığında bir değişim vardı. KULTİGİN Sayfa 2 25.05.2009Zn ve Cd'un her iki dozunda, tüm uygulama grubu tohumlarda çimlenme yüzdesi, kök uzunluğu ve ağırlık kazanımı önemli oranda azaldı. Fakat MN oranı ise bir artış gösterdi. Ayrıca, araştırılan tüm bu parametreler (MN sıklığı hariç) Cd ile muamele edilen tohumlarda Zn ile muamele edilen tohumlara göre daha yüksekti. Diğer bir ifadeyle, kadmiyum (Cd) çinkoya (Zn) göre daha toksik bir metaldi. Sonuç olarak, Zn ve Cd metal iyonları P. vulgaris kök ucu hücrelerinde önemli sitotoksik etkilere sahipti ve çimlenme yüzdesi, kök uzunluğu, ağırlık kazanımı ve MN sıklığı gibi parametreler bu etkilerin izlenmesi için kullanılabilirdi.destekledik. Sitolojik analizlere ilaveten, Zn ve Cd ile muamele edilen P. vulgaris tohumlarının kök ucu meristemlerinden DNA analizleri de gerçekleştirildi. Test materyali olarak P. vulgaris tohumları kullanıldı.. Tohumlar kontrol, Zn ve Cd uygulama grubu olmak üzere üç
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