不同质量浓度铅离子对小扁豆种子萌发的影响

Effect of Pb^(2+) on seed germination of Lens culinaris

测定不同质量浓度(0、5、10、20、35、50、80 mg/L)的Pb2+处理对小扁豆种子萌发的影响,结果表明:Pb2+处理对小扁豆种子萌发具有低浓度下的促进效应和高浓度下的抑制效应.随着Pb2+处理浓度的提高,小扁豆种子相对含水量(RWC)逐渐降低,丙二醛(MDA)含量、脯氨酸(Pro)含量逐渐增加,可溶性糖含量和过氧化物酶(POD)活性则呈先增加后降低的趋势.

The effect of different concentration（0,5,10,20,35,50,80 mg/L） of Pb2＋ on the seed germination of Lens culinaris was studied in this paper.The results showed that Pb2＋ is capable of stimulating budding radio at lower,but reducing budding radio at higher concentrations.With the increase of the concentration of Pb2＋,the seed water content of L.culinaris was decreased gradually,but the content of MDA,the content of proline was increased gradually,the content of soluble sugar and the POD activity first increased and then decreased.