Fig. (5) Effect of dihydrodiconiferyl alcohol (1) and lariciresinol (2) dissolved in DMSO on protein and amino acid content in lettuce leaves after 14 days of MS medium culture, supplemented with (▧)or without sucrose (▇ ).ignans were added from the day 4 of MS culture. Controls,with and without sucrose, were treated only with DMSO. The values are mean ± SD (n=4).