通过设置缺硫(S)处理,研究了镉(Cd)胁迫下水稻生长情况、幼苗Cd和非蛋白巯基含量以及谷胱甘肽硫转移酶(GST)活性的动态变化.结果表明:Cd胁迫明显抑制了水稻生长,显著诱导了巯基物质[非蛋白巯基(NPT)、谷胱甘肽(GSH)、植物螯合肽(PC)]的合成,GST活性表现出先升后降的趋势.缺S处理下,尽管水稻根部对Cd的吸收和向地上部的转运都有所增加,但Cd胁迫程度并未明显增强,巯基物质含量明显降低,根部GST活性提高.表明巯基物质和GST在水稻抗Cd胁迫过程中互为补充,在一定程度上减轻了Cd的毒性效应. The effects of cadmium stress on the growth of rice, Cd and non-protein sulfhydryl content and the activity of glutathione S-transferase (GST) in seedlings under Cd stress were studied by setting sulfur deficiency (S) Inhibited the growth of rice, and significantly induced the synthesis of sulfhydryl (NPT, GSH, PC). The GST activity showed a trend of first increasing and then decreasing. Under Cd stress, however, Cd uptake did not increase obviously, but the content of sulfhydryl group decreased significantly and the GST activity increased in roots, indicating that the accumulation of thiol and GST in rice against Cd stress Complement each other in the process, to a certain extent, reduce the toxic effects of Cd.