CEMİL İŞLEK, Bengü TÜRKYILMAZ ÜNAL, Sinan AYDIN

Effects of Zinc Sulphate Used as an Elicitor on Superoxide Dismutase, Peroxidase and Total Phenolic Compounds of Pepper Calluses

The amount of secondary metabolites can be increased with different elicitor applications in vitro. It has been determined that zinc sulphate significantly increases the amount of capsaicin in the cell culture of red hot pepper. It is important to determine how the metal applied as elicitor will have an effect on plant metabolism. In the study, it was aimed to determine the effects of zinc sulphate (ZnSO4) applied to the cell suspension cultures of pepper seeds at different concentrations (0.1 M, 0.2 M, 0.4 M) and for periods (24, 48, 72 hours) on the total protein and phenolic substance amounts, and superoxide dismutase-peroxidase enzyme activities of pepper calluses. It was observed that the amount of protein increased, superoxide dismutase and peroxidase enzyme activities decreased, and the total amount of phenolic substance increased especially in 72 hours of treatment where zinc was applied as elicitor. These results show that ZnSO4 can be used as an abiotic elicitor in plant cell culture media.

Elisitör Olarak Kullanılan Çinko Sülfatın Biber Kalluslarının Süperoksit Dismutaz, Peroksidaz ve Toplam Fenolik Bileşikleri Üzerine Etkileri

In vitro koşullarda farklı elisitör uygulamalarıyla sekonder metabolit miktarı arttırılabilmektedir. Kırmızı acı biber hücre kültüründe çinko sülfat’ın kapsaisin miktarını önemli derecede arttırdığı tespit edilmiştir. Elisitör olarak uygulanan metalin bitki metabolizması üzerinde nasıl bir etki göstereceğinin belirlenmesi önemlidir. Çalışmada biber tohumlarına ait hücre süspansiyon kültürlerine değişik konsantrasyonlarda (0,1 M; 0,2 M ve 0,4 M) ve sürelerde (24, 48 ve 72 saat) uygulanan çinko sülfat (ZnSO4)’ın biber kalluslarının toplam protein ve fenolik madde miktarları ve peroksidaz-süperoksit dismutaz enzim aktiviteleri üzerine etkilerinin belirlenmesi amaçlanmıştır. Elisitör olarak çinko uyguladığımız gruplarda konsantrasyon artışıyla orantılı şekilde protein miktarının arttığı, süperoksit dismutaz-peroksidaz enzim aktivitelerinin azaldığı, toplam fenolik madde miktarının ise özellikle 72 saat uygulamasında arttığı görülmüştür. Bu sonuçlar ZnSO4’ün bitki hücresi kültür ortamında abiyotik bir elisitör olarak kullanılabileceğini göstermektedir.

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