氧化铈纳米颗粒对老化烟草种子活力的影响

打开文本图片集

中图分类号：S572.043 文献标志码：A 文章编号：1004-390X（2025）06-0097-09

Abstract： [Purpose] To reveal the effects of cerium oxide nanoparticles （ CeO2NPs ） on the vitality of naturally aged tobacco seeds. [Methods] Using naturally aged tobacco seeds （MSK326 and Yunyan 87，aged for 10-23 years） as research materials， four mass concentrations of treatments （0，10， 20， 40mg/L ） were carried out to determine the effects of CeO2NPs seed priming on seed germination and seedling growth， and its physiological regulatory mechanisms Was explored.[Results] Seed priming with four mass concentrations of CeO2NPs could improve the germination performance of naturally aged tobacco seeds， with the 20mg/L （20 CeO2NPs having the best promotion effects on germination potential and germination index， and also shorten the germination time.Furthermore，the seedling height of naturally aged tobacco seeds after primed with 10mg/L （204号 CeO2NPs was significantly higherthan that of the untreated control （CK），and the root growth of naturally aged Yunyan 87 seedling was also significantly promoted. Compared with the CK， seed priming with 10 and 20mg/L CeO2NPs could significantly increase the activities of peroxidase and catalase， and also help to remove malondialdehyde in naturally aged tobacco seeds. [Conclusion] CeO2NPs with appropriate mass concentrations contributes to the seedling growth of naturally aged tobacco seeds， and its priming treatment can activate the antioxidant system and help to clear the lipid peroxidation products， and thus increase the antioxidant capacity of aged seeds. The results provide a feasible technical solution for the promotion of the vitality of naturally aged tobacco seeds.

Keywords： tobacco; aged seed; cerium oxide nanoparticles （ CeO2NPs ）;antioxidase

种子是植物的繁殖器官，也是农业生产的基础。（剩余11855字）