Fig. (2) Effect of dihydrodiconiferyl alcohol (1) and lariciresinol (2) dissolved in DMSO on pigments content in leaves of lettuce after 14 days of MS medium culture, supplemented with (▧ ) or without sucrose ( ▇). Lignans 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).