A pot experiment was conducted in the greenhouse of the National Research
Centre. Dokki. Cairo, Egypt during the winter season of 200012001 to evaluate the
effect of 6-benzyl adenine under different salinity levels on growth, yield and the
concentration of different endogenous hormones in barley plants r:v. Giza 124. Plant
height, number of tillers and leaves/plant, dry weight of shoots No. and length of
spices and straw, grains and lotal yield/plant were decreased as the salt concentration
increased in water used for irrigation of barley plants. BA (6-benzyl adenine) treatment
were slightly affected growth and yield characters. 1M, GA and Cytokinins decreased
but ABA concentration was reversely responded by salt stress. Spraying BA at 50
mgJI raised the endogenous concentration of GA, 1M and Cytokinins by 13.76, 12.97
and 22.77 % and lowered the concentration of ABA by 20.97 %, SA treatment
contracts the effect of salt stress on the different estimated hormones.