addition of 5.0 mg l−1or 10 mg l−1of PPT for the first and second rounds of selection, respectively. The calluses were subcultured every 2 weeks. After 2 rounds of selection, resistant calluses were transferred onto MSH medium supplemented with 0.4 mg l−1kinetin, 200 mg l−1carbenicillin, and 5.0 mg l−1PPT for somatic embryos induction. The embryos of the torpedo shape were transferred to 1/2 MS medium with 1.0 mg l−1PPT for further germination and plant lets formation. The plantlets with well-defined shoots and roots were transplanted to flowerpots with vermiculiteand subsequently to soil.