6 results about "Xanthomonas oryzae" patented technology

The present application belongs to the field of biotechnology, and particularly relates to a preparation method and application of five compounds (1-5) extracted from liquid fermentation of Chaetomium sp. Specifically, the present application discloses five compounds, wherein compound 1 is a new compound. The Chaetomium sp. metabolite has good antibacterial activity on three tested pathogenic bacteria (Pseudomonas syringae pv. actinidiae, Xanthomonas oryzae pv. oryzae and Xanthomonas oryzae pv. oryzicola), and has important significance for development of a new type of microbial source antibacterial agent.

The application discloses corn phosphatidyl phospholipase C4, a coding gene thereof and application of the corn phosphatidyl phospholipase C4 in enhancing disease resistance. The corn phosphatidyl phospholipase C4 can endow transgenic rice with wide resistance without affecting the yield of the rice. The amino acid sequence of the corn phosphatidyl phospholipase C4 is SEQ ID No.2. The sequence of the coding gene is SEQ ID No.1. Research shows that the corn phosphatidyl phospholipase C4 gene is located in the cell membrane, overexpression of the corn phosphatidyl phospholipase C4 gene in rice can improve the resistance of the rice to rice blast caused by Magnaporthe oryzae and rice bacterial leaf blight caused by Xanthomonas oryzae, and meanwhile, the agronomic characters of the rice are evaluated, and it is found that the gene does not affect the ear length, grain length, 1000-grain weight and yield per plant of the rice.

The application discloses a Paraconiothyrium cyclothyrioides PF432 and a preparation method and application of metabolites thereof. The strain is preserved in the China Center for Type Culture Collection, and the preservation number is CCTCC M 20252943. Through liquid fermentation and chromatographic separation, 32 compounds, i.e. compounds 1-21, 22-29 and 30-32, are obtained from fermentation products of ME culture medium, PD culture medium and Gao's No. 1 culture medium of the strain, and the structures are identified through NMR, MS and single crystal X-ray diffraction analysis. Active tests show that the compounds have significant inhibiting effects on Xanthomonas oryzae pv. oryzae and Xanthomonas campestris pv. oryzae, wherein the in-vivo prevention and treatment effects of compounds 10, 15 and 16 on Xanthomonas oryzae pv. oryzae at a concentration of 500 ng / mL are better than that of positive control milbemycins. The application provides new candidate compounds for green prevention and control of plant bacterial diseases.

This invention discloses the application of a kojic acid derivative containing a thioether structure in the preparation of a fungicide for controlling plant bacterial diseases. The compound has the following general structural formula: R is a substituted phenyl group, and the substituent is fluorine, chlorine, bromine, methyl, methoxy, amino, or nitro. The focus of this invention is that this type of compound exhibits excellent biological activity in controlling plant bacterial diseases, especially against rice bacterial blight (… Xanthomonas oryzae pv. oryzae It exhibits significant inhibitory effects, with some compounds showing superior activity compared to commercial agents such as thiabendazole and tebuconazole. The preparation process is simple and suitable for widespread application.