Giberellik Asit ve Salisilik Asit Uygulamalarının Tuz Stresi Altında Yetiştirilen Kolzanın (Brassica napus L.) Bazı Fiziksel ve Kimyasal Özellikleri Üzerine Etkileri

Abstract

In agricultural production, one of the limiting factors on plant growth and yield is soil salinity. The plant growth regulators are of considerable importance in alleviating the negative effect of salt stress. The study was carried out to determine the effects of salicylic (SA) and gibberellic acid (GA3) on the growth and some physiological characters in canola (Brassica napus L.) under salinity conditions in greenhouse. For this purpose, a factorial experiment set up as completely randomized design was conducted with three levels of SA (0, 0.5 and 1 mM) and GA3 (0, 50 and 100 mg l-1) and four levels of NaCl (0, 50, 100 and 150 mM) with three replications. In the study, leaf area, plant height, electrolyte leakage, chlorophyll content and the loss of leaf turgor were investigated. Salt treatments reduced significantly all of the considered parameters, compared with the control. Salinity caused a significant reduction of 63 and 67%in plant height and leaf area, respectively, as compared to the control plants. On the contrary, electrolyte leakage was markedly increased (six-fold) with increasing NaCl levels. Gibberellic acid increased significantly plant height and reduced the loss of leaf turgor, without a significant improve in other parameters. The results indicated that application of SA and GA3 to salinity stressed plants did not significantly affect canola vegetative growth. However, GA3 caused a partial decrease in the adverse effect of salinity.

The Effect of Boron Stress on Germination Properties of Pepper, Eggplant and Watermelon Seeds Subjected to Salicylic Acid Pre-application

“…Applications were applied at room temperature (22°C) for 24 hours and treated seeds were dried over drying papers. Control group seeds were placed into distilled water at the same temperature for the same duration (Korkmaz et al, 2020).…”

“…Similar with these findings, Culpan and Arslan (2018) indicated negative effects of high SA and GA3 doses on plant growth. Korkmaz et al (2020) reported that SA slightly improved plant (canola, Brassica napus L.) growth and development under salt stress. In the other combinations, germination energy values varied with the species.…”