Effect of Triazoles and Pentadienoic Acid on Callus Initiation and Growth of Lettuce (Lactuca sativa L.) plant Part one: Effect on stem segment with one node

The effect of six compounds derived from di-phenylmethy 1,2,4-triazol locally prepared on callus initiation, growth and differentiation of lettuce were carried out. The results indicated that the addition of triazole compounds with PDA to ms medium stimulates callus initiation, shoot and root formation depending on the type and concentration of the compound.
It was found that the addition of 10-5 M PDA with compound B at 10-5 M stimulated shoot and root formation to great extent as compared with other compounds used. Moreover the addition of PDA at 10-5 M with compound B at 10-5 M to MS medium showed the best stimulation of callus initiation compared to other triazole derivative compound used in the study.