Bone marrow stromal cells of 30 days old SD rats were collected,the cells were cultivated in DMEN/F12 medium with 20% calf serum and 5% CO2 at 37 ℃.After 3 times of passage,the cells were induced to differentiate in mediums that contained 4×10-7,4×10-6,4×10-5,4×10-4 g/ml Eucommia ulmoides resp.The effects of E.ulmoides concentration.on proliferation and differentiation of bone marrow stromal cells of SD rats were studied.The results showed that except the treatment with 4×10-7 and 4×10-6g/ml E.ulmoides,othe...