镉对不同小麦品种种子萌发的影响

用室内生物测定方法，在0.5 mmol/L镉胁迫下，对贵州省主要栽培的30个小麦品种种子的萌发率、发芽指数、活力指数、根长、芽长、鲜重以及综合效应进行了统计。结果表明，Cd对种子发芽率影响较小，对发芽指数、活力指数、根、芽生长的影响显著，且对根的抑制效应大于芽；不同小麦品种种子萌发对Cd的响应差异较大。应用快速聚类方法，根据综合效应可以将参试品种划分为耐受型、中间型和敏感型3种不同的敏感类型，其中耐性品种有丰优5号、早麦16号、丰优9870，不耐品种有安麦5号、川麦10号、丰优2号等，其他为耐盐性中等品种。

Effects of cadmium on seed germination of different wheat varieties

By using the techniques of laboratory bioassay, this paper studied the effects of 0.5 mmol/L of cadmium on the germination rate, germination index, vigor index, root length, shoot height and fresh weight of root and shoot to assess the cadmium-resistant ability of wheat by the synthetical effect with 30 wheat varieties mainly cultivated in the province of Guizhou. The results showed that after treated with 0.5 mmol/L of cadmium, seed germination rate was less affected, but germination index, vigor index, root and shoot growth were restrained evidently. Cadmium had more serious impact on root than on shoot. Different wheat varieties had different germination responses to cadmium. Based on their responses to cadmium, the test 30 varieties were clustered into 3 types, ie, tolerant type, medium type, and sensitive type. Fengyou 5, Zaomai 16 and Fengyou 970 were tolerant to Cd and the sensitive varieties include Anmai 5, Chuanmai 10, Fengyou 2 etc.