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首页> 外文期刊>Russian Journal of Plant Physiology >Nitric Oxide Alleviates Zinc Oxide Nanoparticles-Induced Phytotoxicity in Brassica juncea
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Nitric Oxide Alleviates Zinc Oxide Nanoparticles-Induced Phytotoxicity in Brassica juncea

机译：Nitric Oxide Alleviates Zinc Oxide Nanoparticles-Induced Phytotoxicity in Brassica juncea

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Nitric oxide (NO) plays a vital role in plant defense against various environmental stresses. However, the study on the defensive effect of NO on the phytotoxicity induced by zinc oxide nanoparticles (ZnO-NPs) remains scarce. In the present study, sodium nitroprusside (SNP, a NO donor) was used to investigate the mechanism of NO in ameliorating the ZnO-NPs toxicity in mustard (Brassica juncea (L.) Czern.) plants. The plants were treated with the different concentrations of SNP (100 mu M) and ZnO-NPs (1000 and 2000 mu M) either alone or in combination at 25 days after sowing (DAS) for five days consecutively. The results of our study shows that 100 mu M of SNP proved highly effective in mitigating the toxicity induced by ZnO-NP. SNP significantly improve chlorophyll content that partially improve photosynthesis in ZnO-NPs stressed plants. Moreover, the defensive role of SNP in relieving the oxidative damage induced by ZnO-NPs is intimately linked to NO-induced antioxidative defense system. The spray of SNP increased the growth biomarkers as well as proline content in control as well as in ZnO-NPs-treated plants. Additionally, microscopic studies further reveal an increase in the size of stomatal aperture on SNP exposure in ZnO-NPs treated plants. Overall, this study provides the first evidence indicating the functions of SNP in alleviating the ZnO-NPs toxicity in mustard plants.

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