Techniques for obtaining callus of Laminaria digitata have been descri
bed. Effect of plant hormone, auxins (NAA, naphtalene acetic acid, IAA
, indole acetic acid, 2,4-D, dichlorophenoxy acetic acid) and cytokini
n (kinetine) has been tested without success. Brownish or colorless ca
llus were formed from the stipofrondal meristematic tissue but more ge
nerally on the five first centimeters. Callus induction was inhibited
by blue light which enhances growth but wasn't by red, green or white
light.