In this paper, the cotyledons of tomato seedlings from 12 to 16 days old, which were obtained from four Chinese cultivars, were induced to produce regenerated plants by the way of organogenesis. By study on the effect of several facfors, including the concentration matching of exogenous hormones, sucrose concentration and culture condition, a stable and optimal tomato tissue culture and regeneration system of tomato was established. Also, the components and contents of the specific-stage proteins occuring i...