Seed Priming with Ascorbic Acid to Ameliorate the Effects of Salinity Stress on Germination and Growth Traits of Rapeseed (Brassica napus L.)

Authors : Sevda TAŞAN

Pages : 239-251

Doi:10.24180/ijaws.1264452

View : 81 | Download : 87

Publication Date : 2023-08-21

Article Type : Research Paper

Abstract :This study was conducted to determine the effects of seed priming with ascorbic acid insert ignore into journalissuearticles values(AsA); on germination and seedling characteristics of rapeseed insert ignore into journalissuearticles values(Brassica napus L.); under different salinity levels. To this end, the study examined five salinity levels insert ignore into journalissuearticles values(0.20, 5.0, 10.0, 15.0, and 20.0 dS m-1 NaCl); and four priming doses insert ignore into journalissuearticles values(control, 0.5, 1.0, and 2.0 mM ascorbic acid);. Salt stress negatively affected germination and some plant growth traits, such as radicle length insert ignore into journalissuearticles values(RL);, plumule length insert ignore into journalissuearticles values(PL);, radicle fresh weight insert ignore into journalissuearticles values(RFW); and plumule fresh weight insert ignore into journalissuearticles values(PFW);, finally germination percentage insert ignore into journalissuearticles values(FGP);, germination index insert ignore into journalissuearticles values(GI);, mean germination time insert ignore into journalissuearticles values(MGT); and seedling vigor index insert ignore into journalissuearticles values(SVI);. On the other hand, priming with AsA positively affected all parameters except FGP, PFW and salt tolerance index insert ignore into journalissuearticles values(STI);. According to the interaction of salinity stress and priming, the highest values for GI insert ignore into journalissuearticles values(125.3);, MGT insert ignore into journalissuearticles values(1.63 days);, PFW insert ignore into journalissuearticles values(0.35 g);, and STI insert ignore into journalissuearticles values(139.3%); were obtained at 5.0 dS m-1 salinity stress and 1.0 mM AsA dose. However, the highest value was obtained for RL insert ignore into journalissuearticles values(10.6 cm); and SVI insert ignore into journalissuearticles values(1170.7); at the control treatment and 0.5 mM AsA dose, whereas the highest value was obtained for PL insert ignore into journalissuearticles values(1.7 cm); at the control treatment and 1.0 mM AsA dose. Ascorbic acid at low doses insert ignore into journalissuearticles values(0.5 and 1.0 mM); had a positive effect on seedling germination and growth traits, while higher concentrations had a toxic effect on germination. Thus, it was concluded that priming rapeseed seeds with an AsA dose of 0.5 mM could reduce the restrictive impact of salinity stress on seed germination and seedling improvement. Further studies on the yield and growth parameters of rapeseed under salt stress by AsA application are recommended.
Keywords : Askorbik asit, çimlenme özellikleri, kolza, tuzluluk