Determination of the Effect of Salt (Nacl) Stress on Germination of Oat (Avena Sativa L.) Seeds Pretreated With Gibberellic Acid

Abstract

The aim of this study was to investigate the effects of gibberellic acid (GA(3)) applications on germination properties and seedling parameters of Faikbey variety of oat (Avena sativa L.) seeds under the stress of salt (NaCl). The study was carried out in 2019 in Van Yuzuncu Yil University, Faculty of Agriculture, Department of Field Crops laboratuary. Four different GA(3) (control (0), 50, 100 and 200 ppm) and four different NaCl levels ( control (0), 100, 200 and 300 mM) were applied in the study. According to the results, the effects of the NaCl doses, GA(3) doses and GA(3) x interactions were significant (p<0.05) on the all germination properties such as the germination power, germination rate, mean germination time, germination index and sensititivity index and had also on the seedling parameters as radicle length, hypocotyl length fresh radicle weight and fresh hypocotyl were significant (p<0.05). The effects of salt and gibberellic acid doses on dry radicle and dry hypocotyl weights were significant (p<0.05), while the effects of salt X gibberellic acid interactions were not significant. In the study, it was observed that germination properties were negatively affected by increasing NaCl concentrations and there was no germination in 300 mM NaCl application. This adverse condition was observed to be controlled with increasing doses of GA(3). On the other hand, it was found that seedling parameters such as radicle and hypocotyl length, which were negatively affected by 67% compared to the control with 100 mM NaCl application, were increased by 2 cm compared to control with 50 ppm GA(3) application.