Figure 4: Increase in callus formation / regenaeration frequency after irradiation with different doses of gamma radiation.A: Callus growth in controlled cultures; B: Callus growth in irradiated cultures.C: Induction of shoots in controlled cultures.;D: Induction of shoots in irradiated cultures; E: Induction of multiple shoots in controlled cultures; F: Induction of multiple shoots in irradiated cultures.