镉胁迫对甜高粱种子萌发的影响

Effects of Cadmium Stress on Seed Germination of Different Sweet Sorghum Varieties

本试验用浓度分别为0,2,4,8,16,32 mg/L的镉溶液对3个甜高粱品种(上海甜高粱、意大利甜高粱和兴佳甜高粱)的种子进行胁迫处理,测定了镉胁迫对种子发芽势、发芽率、发芽指数、活力指数、苗长和根长等发芽指标的影响。结果表明,在镉胁迫条件下,3个品种的发芽指标大都随着镉浓度的增加先升高后降低,4 mg/L的镉可以促进甜高粱种子的萌发。在3个参试品种中,上海甜高粱的耐镉性最好。

Three representative sweet sorghums were used in this experiment. The germination tendency, germination percentage, germination index, vigor index and the length of root and bud were tested to determine the effects of cadmium stress at the concentration 0,2,4,8,16 and 32 mg/L. The results indicated that, under the cadmium stress, most of the data firstly rose and then dropped with the increasing of cadmium concentration. At 4 mg/L, the germination was accelerated. The cadmium tolerant of Shanghai sweet sorghum was the best among the three trialed varieties.