“…Tissue formed on the light was usually green colour, which obviously resulted from the chlorophyll synthesized under such conditions. Induction of callus from various grass pea explants and further tissue growth was carried out on the light (Barik and Kar, 2005;Roy et al, 1991Roy et al, , 1992Roy et al, , 1993Sinha et al, 1983) or in the dark for 2 to 7 days, and then on the light Maheshwari, 1980, 1983;Zambre et al, ). Just as the callus induction, its proliferation proceeded without major problems.…”