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研究了稀土元素Eu3＋对药用植物大黄愈伤组织生长的影响，结果显示：在MS培养基中附加稀土元素可明显影响愈伤组织的生长；低浓度稀土促进生长，高浓度抑制生长；并对稀土的作用机理做了探讨以及对愈伤组织中的蒽醌类化合物进行了定性、定量分析。
The effect of rare earth Eu3+ on the callus growth of medicinal plant Rhubarb was studied. The results showed that the addition of rare earth elements in MS medium could significantly affect the growth of callus; low concentration of rare earth promoted growth and high concentration inhibited growth; The mechanism of rare earths was discussed as well as the qualitative and quantitative analysis of the terpenoids in callus.