Gizem ÖZKOKU, Sertan ÇEVİK, Serpil ÜNYANAR

Dışsal sentetik inositol türevi (Allo-İnositol) uygulamasının Capsicum chinense bitkisinin tuz (NaCl) toleransı üzerine etkisi

Bu çalışmada tuz stresine maruz bırakılan Capsicum chinense (biber) bitkisinde, dışsal olarak yapraklardan uygulanan sentetik siklitol türevi allo-inositol’ün tuz tolerans mekanizmasında oynadığı rollerin fizyolojik ve biyokimyasal yöntemlerle araştırılması amaçlanmıştır. Bu kapsamda tuz stresine maruz bırakılan bitkiler (150 µM NaCl) gerek kontrol bitkileri gerekse siklitol uygulanmış stres gruplarıyla kıyaslanarak; yaprak su potansiyelleri, antioksidan enzim aktiviteleri, lipid peroksidasyonları (MDA), hidrojen peroksit (H2O2), prolin ve kalsiyum miktarları belirlenmiştir. Bulgularımıza göre stres gruplarında allo-inositol uygulaması yaprak su potansiyelini, prolin miktarını, kalsiyum içeriğini ve antioksidan enzim aktivitelerini arttırırken, MDA ve H2O2 içeriğini ise azaltmıştır. Bu sonuçlara göre; dışsal olarak uygulanan sentetik allo-inositol’ün biber bitkisinde tuz stresinin olumsuz etkilerini hafifletebildiği söylenebilir.

The effect of exogenous application of Synthetic inositol derivative (Allo-Inositol) on salt tolerance of Capsicum chinense

In this study, it is aimed to investigate the role of synthetic cyclitol derivative allo-inositol on salt tolerance mechanism in the Capsicum chinense (pepper) which is exposed to salt stress by physiological and biochemical methods. Plants thatexposed to salt stress (150 µM NaCl) compared to both control plants and cyclitol applied stress groups; leaf water potentials, antioxidant enzyme activities, lipid peroxidation (MDA), hydrogen peroxide (H2O2), proline and calcium levels were determined. According to our findings, application of allo-inositol in stressed groups increased leaf water potential, proline amount, calcium content, and antioxidant enzyme activities while decreasing MDA and H2O2 content. According to these results; it can be said that the synthetic allo-inositol which exogenously applied to pepper plant may alleviate the negative effects of salt stress.

Keywords:

Allo-inositol, Pepper, Salt stress,

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