Stimulatory effect of HBR on the germination of barley roots
The effects of HBR on germination of barley roots were presented on Fig. 1; Table 1. About 0.1, 0.5 and 1 lM HBR produced significant effects on root germination in
the first 48 h. However, there was no significant change in the number of roots germinated from one seed. The root length (in primary roots) was almost doubled 1.62 ± 0.6 cm (in control) to 2.49 ± 0.8 cm (in 1 lM HBR treated materials) and obvious enlargements at the root tips were observed. Similarly, an increase was also observed in seminal root lengths (Table 1).