稀土元素对卡特兰组培苗生长及生理效应的研究

试验以卡特兰（Cattleya．Labiata）组培苗作为材料．在基本分化培养基（MS＋6-BA6mg/L＋NAA0.2mg/L）中添加稀土溶液。浓度为0mg／L（CK）。5mg／L（A），15mg／L（B）．25mg／L（C），探讨不同浓度稀土溶液对卡特兰组培苗生长及生理效应。试验结果表明。浓度为5mg／L的稀土溶液对卡特兰组培苗分化及生长有较强的促进作用，浓度为15mg／L的稀土溶液对卡特兰组培苗生长和生理指标的促进作用有所减缓，浓度为25mg／L的稀土溶液对卡特兰组培苗已表现出明显的抑制作用。

Study of thulium in the growth and physiological effect of cattleya seedling

This experiment studied the solution of thulium with different concentration in the growth and physiological effect of the seedling of Cattleya.Labiata in the tissue culture.The basic culture medium was MS 6-BA6 mg/L NAA0.2 mg/L and the solution of thulium was added.The concentration was 0 mg/L(CK),5 mg/L(A),15 mg/L(B),25 mg/L(C).The result indicated the concentration of 5 mg/L could accelerate the growth and differentiation of seedling and the concentration of 25 mg/L could restrain the growth of seedling.