The effects of different cadmium ion concentrations on callus induction,growth and plantlet regeneration of creeping bentgrass were studied.When cadmium ion concentration in medium was below 2.50 mg/L,the induction frequency was higher than that of control.The induction frequency reached up to 83.3%when cadmium ion concentration in medium was 2.50 mg/L,indicating that low cadmium ion concentration may have stimulating effect on callus formation.As cadmium ion concentration increased,the induction frequency ...