大豆种子萌发和幼苗生长对锑胁迫的响应

为研究锑（Sb）对大豆种子萌发及幼苗生长的影响，采用水培方法，进行了锑胁迫大豆种子发芽和根伸长观察实验，并对大豆2周幼苗的根部和茎叶部的锑含量用电感耦合等离子体质谱（ICP-MS）分别进行了测定。结果表明：0~200 mg/L浓度范围内，Sb对大豆发芽势和发芽指数的作用呈现为整体促进、低强高弱的趋势，即各实验浓度组发芽势均高于空白组，在15 mg/L浓度时达到最大值；对发芽率无影响；对根伸长有抑制作用，且随锑浓度的增大而增大；15 mg/L时，其对大豆的活力指数的促进作用最为明显；15~50 mg/L浓度范围内茎叶部测得Sb含量较高，测定最高值出现在50 mg/L组为2.45 mg/kg，各组根部均未检出。

THE RESPONSE OF ANTIMONY STRESS ON SOYBEAN SEED GERMINATION AND SEEDING GROWTH

he contamination of antimony in the soil is increasingly severe. Antimony is non-essential to plants, but can be readily taken up by plants to enter the food chain. The effects of antimony solution in different concentrations on soybean germination potentiality, germination rate, germination index ,vigor index, root length and the content of Sb in soybean seeds was studied in this paper. The results showed that the antimony solution under 200 mg/L conducted positive effect on soybean germination while checked the root length. All the seeds under different concentration germinated. The germination index and vigor index increased along with increasing concentration of antimony, and the strongest role in promoting was 15 mg/L. The determination result of soybean seedling by ICP-MS showed that the capability to uptake antimony for shoot was higher than root. The antimony content of shoot was highest rang from 15 mg/L to 50 mg/L.