Cobalt oxide nanoparticles: An effective growth promoter of Arabidopsis plants and nano-pesticide against bacterial leaf blight pathogen in rice

文献类型： 外文期刊

第一作者： Ogunyemi, Solabomi Olaitan

作者： Ogunyemi, Solabomi Olaitan;Xu, Xinyan;Abdallah, Yasmine;Lv, Luqiong;Ahmed, Temoor;Li, Bin;Xu, Lihui;Abdallah, Yasmine;Rizwan, Muhammad;Ali, Hayssam M.;Khan, Fahad;Yan, Chengqi;Chen, Jianping

作者机构：

关键词： Cobalt oxide nanoparticles; Xanthomonas oryzae pv; oryzae; Arabidopsis; Chlorophyll fluorescence; Gene expression; Antibacterial activity

期刊名称：ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY （ 影响因子：6.8； 五年影响因子：6.9 ）

ISSN： 0147-6513

年卷期： 2023 年 257 卷

页码：

收录情况： SCI

摘要： Recently, the application of cobalt oxide nanoparticles (Co3O4NPs) has gained popularity owing to its magnetic, catalytic, optical, antimicrobial, and biomedical properties. However, studies on its use as a crop protection agent and its effect on photosynthetic apparatus are yet to be reported. Here, Co3O4NPs were first green syn-thesized using Hibiscus rosa-sinensis flower extract and were characterized using UV-Vis spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction (XRD), transmission/scanning electron microscopy methods. Formation of the Co3O4NPs was attested based on surface plasmon resonance at 210 nm. XRD assay showed that the samples were crystalline having a mean size of 34.9 nm. The Co3O4NPs at 200 mu g/ml inhibited the growth (OD600 = 1.28) and biofilm formation (OD570 = 1.37) of Xanthomonas oryzae pv. oryzae (Xoo) respectively, by 72.87% and 79.65%. Rice plants inoculated with Xoo had disease leaf area percentage (DLA %) of 57.25% which was significantly reduced to 11.09% on infected plants treated with 200 mu g/ml Co3O4NPs. Also, plants treated with 200 mu g/ml Co3O4NPs only had significant increment in shoot length, root length, fresh weight, and dry weight in comparison to plants treated with double distilled water. The application of 200 mu g/ml Co3O4NPs on the Arabidopsis plant significantly increased the photochemical efficacy of PSII (phi PSII) and photochemical quenching (qP) respectively, by 149.10% and 125.00% compared to the control while the non-photochemical energy dissipation (phi NPQ) was significantly lowered in comparison to control. In summary, it can be inferred that Co3O4NPs can be a useful agent in the management of bacterial phytopathogen diseases.

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