The physiological responses of peanut seedlings exposed to low (5 µM) or high (200 µM) cadmium (Cd) concentration and the ability of sodium nitroprusside (SNP, a donor of NO) to reverse the harmful effects of Cd on peanut (Arachis hypogaea L.) were studied. Changes in plant growth parameters, chlorophyll content, antioxidant system, nutrient contents and Cd accumulation were investigated. The results showed that SNP and 5 µM Cd improved plant growth and chlorophyll content. Furthermore, antioxidative system was up-regulated, and as a result, the production rate of superoxide radical (O₂^•−) was reduced. Moreover, the absorption of nutrient elements was not impacted, and Cd toxicity was not observed. However, 200 µM Cd had negative effects on the above measured parameters and dramatically increased the accumulation of Cd in all the plant organs. In the 200 µM Cd treatment, addition of 250 µM SNP stimulated plant growth and increased chlorophyll content. It also enhanced the regulation of antioxidative system and reduced the production rate of O₂^•− and malondialdehyde (MDA) content. Besides, SNP supply enhanced the absorption of nutrient elements and restrained the absorption and transport of Cd.

暴露于低（5 µM）或高（200 µM）镉（Cd）浓度的花生幼苗的生理响应以及硝普钠（SNP，NO的供体）能够逆转Cd对花生的危害（花生） L.）进行了研究。研究了植物生长参数，叶绿素含量，抗氧化剂系统，养分含量和镉积累的变化。结果表明，SNP和5 µM Cd改善了植物的生长和叶绿素含量。此外，抗氧化系统被上调，其结果是超氧自由基（O ₂ ^•-）减少了。而且，营养元素的吸收没有受到影响，并且没有观察到镉的毒性。但是，200 µM Cd对上述测量参数具有负面影响，并大大增加了Cd在所有植物器官中的积累。在200 µM Cd处理中，添加250 µM SNP可以刺激植物生长并增加叶绿素含量。它还增强了抗氧化系统的调节作用，降低了O ₂ ^•-和丙二醛（MDA）含量的产生速率。此外，单核苷酸多态性（SNP）的供应增加了营养元素的吸收，并限制了镉的吸收和运输。