Effect ofgibberlic acid (GA3) insalinity stress on germination of spring wheat

ABSTRACT:Effect of different concentration of gibberlic acid (GA3) on germination of wheat seeds, Tajan cultivar under salinity stress was investigated as factorial based on completely randomized design with four replicates in laboratory of agronomy and plant breeding of agricultural department, Islamic Azad University, Varamin-Pishva Branch in 2012. The first factor was four levels of GA3 hormone including H0: control, H1:GA3 (100mg/litr)، H2:GA3 (150mg/litr)، H3:GA3 (200mg/litr)) and the second factor was four levels of salinity including S1:3.78, S2: 5.95, S3: 10.25 and S4: 12.87 ds/m. coleoptile and cleorhiza length, cleorhiza number, coleoptile and cleorhiza dry weight, germination percent and number of damaged seeds were measured. Analysis of variance showed significant difference among salinity, hormone and their opposite effect for coleoptile and cleorhiza length, cleorhiza number at 1% of probability level. There were no significant differences for other properties. Following increasing salinity, coleoptile and cleorhiza length, cleorhiza number decreased severely. The results indicated that following increasing salinity, application of hormone had no significant effect on other properties.