Figure 1.

Effects of hematin or hemin on the induction of adventitious root formation. The primary root system was removed from hypocotyls of 5-d-old germinated cucumbers. Explants without any pretreatment were incubated with water, hematin, or hemin at the indicated concentrations. Adventitious root number and length were determined after 5 d of treatment. Mean and se values were calculated from at least three independent experiments (n = 20). Bars with asterisks were significantly different in comparison with water treatment at P < 0.05 and P < 0.01 (t test).