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应用蚕豆初生根尖细胞微核技术研究Ｌａ３＋、Ｓｍ３＋、Ｙ３＋、Ｇｄ３＋等稀土金属离子的诱变性，发现稀土金属离子在达到一定剂量时均可引起蚕豆根尖细胞微核率的升高，与对照组相比差异显著（Ｐ＜０．０５，Ｐ＜０．０１）。在早期生长试验中，应用７ｄ生长的蚕豆幼苗干重表征蚕豆的早期生长情况，比较蚕豆的发芽率及幼苗干重，反映稀土金属离子对蚕豆早期生长发育的毒性。结果表明，稀土金属离子在高浓度时对蚕豆的发芽率有一定影响，其中以Ｓｍ３＋、Ｙ３＋、Ｇｄ３＋更为明显；从蚕豆幼苗干重可以看出，稀土离子在低浓度时对蚕豆早期生长具有刺激作用，并具最适浓度，在高浓度时均具有抑制作用，且随着浓度的升高，抑制作用增强。
The mutagenicity of rare earth metal ions such as La3 +, Sm3 +, Y3 +, Gd3 + and other rare earth metal ions was studied by using micronucleus test of primary root tip cells of Vicia faba. It was found that the micronucleus rate of Vicia faba root tip cells could be increased when reaching a certain dose. The difference between the two groups was significant (P <0.05, P <0.01). In the early growth experiment, the early growth of Vicia faba L. seedlings was characterized by dry weight of seedlings grown for 7 days. The germination rate and seedling dry weight of Vicia faba were compared to reflect the toxicity of rare earth metal ions to Vicia faba early growth and development. The results showed that rare earth metal ions had a certain effect on the germination rate of Vicia faba at high concentration, of which Sm3 +, Y3 + and Gd3 + were more obvious. From the dry weight of Vicia faba seedlings, Stimulating effect, and with the optimal concentration, both at high concentrations have inhibitory effect, and with the increase in concentration, inhibition enhanced.