Effect Of 24- Epi Brassinolide on Some BiochemicalCharacteristics of Parus and Gaviota Strawberry Cultivars Under Heat Stress Conditions

Abstract

The study was arranged as factorial experiment in a completely randomized design with three applications of cultivar (Parus and Gaviota), 24- Epi brassinolide concentrations (0, 1 and 2 mgl-1) and temperature (normal and stress) as three replications. Some of the measuring characteristics showed that there was a significant difference among the treatments. Under heat stress conditions, foliar application of 24- Epi brassinolide at 1 mgl-1 concentration increased the amount of catalase and superoxide dismutase activity in leaves of Parus cultivar. Both cultivars fruits showed the highest total soluble solid contents in treatment 24- Epi brassinolide spraying at 2 mgl-1 concentrations under normal temperature. The highest total phenolics was in Gaviota cultivar treated with 24- Epi brassinolide spraying at 2 mgl-1 concentrations under normal temperature. Both cultivars had the lowest flavonoid in treatments without 24- Epi brassinolide and with 24- Epi brassinolide at 2 mgl-1 concentrations under heat stress conditions. In Gaviota cultivar, application of high concentration of 24- Epi brassinolide (2 mgl-1) prevented the reduction of total anthocyanin under heat stress conditions.

Keywords

• Anthocyanin,Dismutase,Flavonoid,Phenolics,Superoxide

24-Epi Brassinolidin, Sıcaklık Stresi Koşullarında Parus ve Gaviota Çilek Çeşitlerinin Bazı Biyokimyasal Özellikleri Üzerine Etkisi

Abstract

Çalışma, çeşit (Parus ve Gaviota), 24-Epi brassinolid konsantrasyonları (0, 1 ve 2 mg/l) ve sıcaklık (normal ve stres) olmak üzere üç uygulama 3 tekerrürlü olarak tesadüf parselleri faktöriyel deneme deseninde düzenlenmiştir. Ölçüm özelliklerinden bazıları, uygulamalar arasında önemli bir fark olduğunu göstermiştir. Sıcaklık stresi koşulları altında, 24 mg-Epi brassinolidin 1 mg/l konsantrasyonunda yapraktan uygulanması, Parus çeşidinin yapraklarındaki katalaz ve süperoksit dismutaz aktivitesini arttırmıştır. Her iki çeşidin meyveleri, normal sıcaklık altında 2 mg/l konsantrasyonunda 24-Epi brassinolid uygulamasında en yüksek suda çözünür kuru madde içeriğine sahip olmuştur. En yüksek toplam fenolikler, normal sıcaklık altında 2 mg/l konsantrasyonunda 24-Epi brassinolid uygulanan Gaviota çeşidinde tespit edilmiştir. Her iki çeşit, 24-Epi brassinolid içermeyen ve 24-Epi brassinolid içeren uygulamalarda, sıcaklık stresi koşulları altında 2 mg/l konsantrasyonunda en düşük flavonoid içeriğine sahip olmuştur. Gaviota çeşidinde, yüksek konsantrasyonda 24-Epi brassinolid (2 mg/l) uygulanması, sıcaklık stresi koşulları altında toplam antosiyanin miktarının azalmasını önlemiştir.

Keywords

• Antosiyanin,Dismutaz,Flavonoid,Fenolikler,Süperoksit

References

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