Shaanxi Key Laboratory of Catalysis, School of Chemical & Environment Science, Shaanxi University of Technology, Hanzhong, Shaanxi, 723001, People's Republic of China.
State Key Laboratory of Qinba Bio-Resource and Ecological Environment, Shaanxi University of Technology, Hanzhong, Shaanxi, 723001, People's Republic of China.
Environ Sci Pollut Res Int. 2023 Aug;30(37):87016-87027. doi: 10.1007/s11356-023-28534-5. Epub 2023 Jul 7.
Bordeaux mixture is commonly used in agricultural production due to its certain antibacterial activity. However, it has been observed to promote plant growth at a slow pace. Therefore, it is crucial to explore an effective antibacterial agent that can enhance the antibacterial activity and promote plant growth in commercially available Bordeaux mixture, which can significantly contribute to the development of the agricultural economy. The investigation into inorganic agents with both bacteriostatic and plant-promoting properties has a broad application potential in agriculture. FeO/ZnO (FZ) composites were synthesized from FeCl, ZnCl, and NaAc in a "one-pot approach" and analyzed using transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and a vibrating sample magnetometer (VSM). To investigate the antibacterial activity and mechanism of FZ nanocomposites, Gram-negative Escherichia coli (E. coli) and Gram-positive Staphylococcus aureus (S. aureus) were used as model bacteria, and human mammary epithelial cells and model plant mung bean were used as targets to study the effects of FZ on human and plant growth. The results revealed that at 300 µg/mL for 80 min, the antibacterial efficacy of FZ composites was 99.8% against E. coli, which was 20% greater than that of Bordeaux liquid (FC), and 99.9% against S. aureus, which was 28.6% higher than that of FC. The inhibitory mechanism demonstrated that the substance could efficiently damage the bacterial cell wall of a concentration of 300 µg/mL. The IC of the material to human mammary epithelial cells was 49.518 µg/mL, and it also increased mung bean germination, root growth, and chlorophyll content, indicating that the application performance was 1.5 times better than that of FC. Its exceptional performance can be used to treat agricultural diseases.
波尔多混合物由于其一定的抗菌活性，在农业生产中被广泛使用。然而，它被观察到在促进植物生长方面进展缓慢。因此，探索一种有效的抗菌剂来提高市售波尔多混合物的抗菌活性和促进植物生长是至关重要的，这将极大地促进农业经济的发展。研究具有抑菌和促进植物生长特性的无机剂在农业中有广泛的应用潜力。通过在“一锅法”中使用 FeCl、ZnCl 和 NaAc，合成了 FeO/ZnO（FZ）复合材料，并通过透射电子显微镜（TEM）、X 射线衍射（XRD）、X 射线光电子能谱（XPS）和振动样品磁强计（VSM）进行了分析。为了研究 FZ 纳米复合材料的抗菌活性和机制，使用革兰氏阴性大肠杆菌（E. coli）和革兰氏阳性金黄色葡萄球菌（S. aureus）作为模型细菌，以及人乳腺上皮细胞和模式植物绿豆作为靶标，研究 FZ 对人和植物生长的影响。结果表明，在 300µg/mL 下作用 80min，FZ 复合材料对 E. coli 的抗菌效果为 99.8%，比波尔多液（FC）高 20%，对 S. aureus 的抗菌效果为 99.9%，比 FC 高 28.6%。抑制机制表明，该物质能有效地破坏浓度为 300µg/mL 的细菌细胞壁。该材料对人乳腺上皮细胞的 IC 为 49.518µg/mL，同时也增加了绿豆的发芽、根生长和叶绿素含量，表明其应用性能比 FC 好 1.5 倍。其卓越的性能可用于治疗农业病害。
