Effects of pre-application with gibberellic acid on germination of soybean under salt stress

This study was conducted to determine the effect of GA3 applied on soybean seeds before germination in Sinop University Department of Biology Laboratory. Soybean seeds were treated with different doses of GA3 (50, 100 and 150 ppm) for three different application times (6, 12 and 24 hours). After this, soybean seeds pretreated GA3 irrigated with different doses of pure water and NaCl (50, 100 and 150 mM). Germination rate and germination time at room temperature, radicle and hypocotyl lenght, wet and dry weight of radicle, hypocotyl and cotyledon values were examined. Study, the highest germination rate was by (42.83% and 41%) and 6 hours in GA3 pre and NaCl application (pure water) group, the highest germination time (6.80 and 6.81 days) at 6 hours with control (pure water) and at 50 ppm GA3 pre and 150 mM NaCl. The highest radicle and hypocotyl length were obtained from 12 hours pre-application control (pure water) and 100 ppm GA3 dose. As a result; it has been observed that as the salt ratio increases, all the parameters decrease significantly and the soybean seed is very sensitive to salt, especially 6 hours control (pure water) and 50 ppm GA3 pretreatment provides salinity resistance.