The effect of ascorbate and gibberellin foliar application on pigment content and biomarkers in Sage (Salvia officinalis L.) under salinity stress conditions
Subject Areas : Crop Production Research
1 - Agricultural expert
Keywords: Ascorbate, Gibberellin, Pigment content, Sage (Salvia officinalis L.), Salinity ,
Abstract :
To investigate the effect of ascorbate and gibberellin on some physiological characteristics of the Salvia medicinal plant under salt stress conditions, an experiment was done at municipal greenhouse No¬¬ 15 in March 2013. The experiment was as factorial based on completely randomized design (CRD) with four replications. Experimental factors including salinity levels in 4 levels (0, 25, 50 and 75 mM Nacl), ascorbate in 2 levels (0 and 4 mM) and gibberellin in two levels (0 and 2 mM). The mean Comparison simple effect of salinity stress showed that this factor caused a significant decrease in chlorophylls amount an increase in degradation biomarkers, although in D-tyrosine content, the salinities 50 and 75 mM were located in the same statistical group. Foliar application of 4 mM ascorbate and 2 mM gibberellin decrease of all biomarkers and increase of photosynthetic pigments. The significant mean comparing interaction effects showed that in the case of non salinity stress, use of ascorbate did not lead to an increase in carotenoids, but in moderate (50 mM) and severe (75 mM) salinities, its application increased carotenoids.