Cerium oxide nanoparticles promoted lateral root formation in Arabidopsis by modulating reactive oxygen species and Ca2+ level

文献类型： 外文期刊

第一作者： Li, Guangjing

作者： Li, Guangjing;Gao, Quanlong;Nyande, Ashadu;Dong, Zihao;Khan, Ehtisham Hassan;Han, Yuqian;Wu, Honghong;Li, Guangjing;Gao, Quanlong;Nyande, Ashadu;Dong, Zihao;Khan, Ehtisham Hassan;Han, Yuqian;Wu, Honghong;Wu, Honghong;Wu, Honghong

作者机构：

关键词： Ca2+; histochemical staining; laser confocal microscopy; lateral root formation; nanoceria; qPCR; ROS; transmission electron microscopy

期刊名称：FUNCTIONAL PLANT BIOLOGY （ 影响因子：2.7； 五年影响因子：3.0 ）

ISSN： 1445-4408

年卷期： 2024 年 51 卷 10 期

页码：

收录情况： SCI

摘要： Roots play an important role in plant growth, including providing essential mechanical support, water uptake, and nutrient absorption. Nanomaterials play a positive role in improving plant root development, but there is limited knowledge of how nanomaterials affect lateral root (LR) formation. Poly (acrylic) acid coated nanoceria (cerium oxide nanoparticles, PNC) are commonly used to improve plant stress tolerance due to their ability to scavenge reactive oxygen species (ROS). However, its impact on LR formation remains unclear. In this study, we investigated the effects of PNC on LR formation in Arabidopsis thaliana by monitoring ROS levels and Ca2+ distribution in roots. Our results demonstrate that PNC significantly promote LR formation, increasing LR numbers by 26.2%. Compared to controls, PNC-treated Arabidopsis seedlings exhibited reduced H2O2 levels by 18.9% in primary roots (PRs) and 40.6% in LRs, as well as decreased O-2(-) levels by 47.7% in PRs and 88.5% in LRs. When compared with control plants, Ca2+ levels were reduced by 35.7% in PRs and 22.7% in LRs of PNC-treated plants. Overall, these results indicate that PNC could enhance LR development by modulating ROS and Ca2+ levels in roots.

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