A new function of graphene oxide emerges: inactivating phytopathogenic bacterium Xanthomonas oryzae pv. Oryzae
A new function of graphene oxide emerges: inactivating phytopathogenic bacterium Xanthomonas oryzae pv. Oryzae
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氧化石墨烯的新功能出现：灭活植物病原菌米黄单胞菌。
DOI：
10.1007/s11051-013-1658-6
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发表时间：
2013-05-01
影响因子：
2.5
通讯作者：
Han, Heyou
中科院分区：
文献类型：
--
作者：
Chen, Juanni;Wang, Xiuping;Han, Heyou
水稻白叶枯病菌。稻瘟病菌(oryzae，Xoo)是水稻上一种具有代表性的植物病原菌。首次研究了不同分散剂中悬浮的石墨烯对Xoo的抑菌活性。提供了细菌学测试数据、荧光显微镜和透射电子显微镜图像，这些图像有助于深入了解纳米材料的抗菌作用。令人惊讶的是，结果表明，氧化石墨烯(GO)在水中即使在极低的剂量(250g/μ)下也显示出优越的杀菌效果，几乎杀死了94.48%的细胞，而普通杀菌剂双硫噻唑的死亡率仅为13.3%。由于氧化石墨烯锋利的边缘导致细胞膜发生显著变化，并产生活性氧物种，这可能是细菌灭活的致命因素，因此灭活细菌的效率很高。鉴于GO具有良好的抗菌效果，而且GO可以低成本大规模生产，我们期待GO作为一种新的杀菌剂应用于植物病害的防治，这对农业发展具有重要意义。
Xanthomonas oryzae pv. oryzae (Xoo) is one representative phytopathogenic bacterium causing bacteria infections in rice. The antibacterial activity of graphene suspended in different dispersants against Xoo was first investigated. Bacteriological test data, fluorescence microscope and transmission electron microscopy images are provided, which yield insight into the antibacterial action of the nanoscale materials. Surprisingly, the results showed graphene oxide (GO) exhibits superior bactericidal effect even at extremely low dose in water (250 μg/mL), almost killing 94.48 % cells, in comparison to common bactericide bismerthiazol with only 13.3 % mortality. The high efficiency in inactivating the bacteria on account of considerable changes in the cell membranes caused by the extremely sharp edges of graphene oxide and generation of reactive oxygen species, which may be the fatal factor for bacterial inactivation. Given the superior antibacterial effect of GO and the fact that GO can be mass-produced with low cost, we expect a new application could be developed as bactericide for controlling plant disease, which may be a matter of great importance for agricultural development.