期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 67, 期 27, 页码 7626-7639出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.9b02734
关键词
oxadiazoles; heterocyclic patterns; biological activity; quantitative proteomics
资金
- National Natural Science Foundation of China [21877021, 21662009, 21702037, 31860516]
- Research Project of Ministry of Education of China [20135201110005, 213033A]
- Guizhou Provincial ST Program [[2012]6012, [2017]222, [2017]7259, [2017]5788]
A novel series of simple 1,3,4-oxadiazoles that bear flexible heterocyclic patterns was prepared, and their biological activities in plant pathogenic bacteria, fungi, oomycetes, and Meloidogyne incognita in vitro and in vivo were screened to explore low-cost and versatile antimicrobial agents. Screening results showed that compounds, such as A(0), B-0, and C-4, were bioactive against Xanthomonas oryzae pv oryzae in vitro and in vivo, and such bioactivities were superior to those of commercial agents bismerthiazol and thiodiazole copper. Their antibacterial mechanisms were further investigated by quantitative proteomics and concentration-dependent scanning electron microscopy images. Antifungal results indicated that compound A(0) displayed a selective and better antifungal effect on Botrytis cinerea with inhibition rate of 96.8% at 50 mu g/mL. Nematocidal bioassays suggested that compound D-1 had good in vitro nematocidal activity toward M. incognita at 24, 48, and 72 h, with the corresponding insecticidal efficiency of 48.7%, 64.1%, and 87.2% at 40 mu g/mL. In vivo study further confirmed that compounds D-1 and F-2 showed nematocidal actions at 80 mu g/mL with a disease index of 1.5. Given these advantages, this kind of molecular frameworks could be a suitable platform for exploring highly efficient agrochemicals.
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