65 results about "Xanthomonas axonopodis" patented technology

The invention disclose a pyridine salt compound containing 1,3,4-oxadiazolyl (thiadiazolyl) and a preparation method and application thereof. The compound is of the structure shown in the general formula (I). Based on the 1,3,4- oxadiazole (thiadiazole) thioether (sulfoxide or sulfone) compound, a pyridine base capable of improving the biological activity of the target compound is introduced into the system, and a series of 1,3,4- oxadiazole (thiadiazole) oxygen ether, thioether, sulfoxide or sulfone amphipathic molecules containing pyridine salt are synthesized. It is found that the compound has the good restraining effect on pathogenic bacteria and fungi such as Xanthomonas oryzae pv. oryzae, Ralstonia solanacearum, Xanthomonas axonopodis pv. citri, Gibberella zeae, Phytophythora infestans, Rhizoctonia solani, Borrytis cinerea, Fusarium oxysporum and Phytophythora infestans, and provides an important scientific foundation for new pesticide research, development and creation.

The invention discloses a myricetin derivative containing amide thioether thiadiazole, of which a general formula is represented as follows, wherein R is hydrocarbyl groups, phenyl groups, substituted phenyl groups, heteroaromatic ring groups or substituted heteroaromatic ring groups. The compound has high treatment and prevention effect against tobacco mosaic virus (TMV), has high anti-plant virus activity and can be used for preparing anti-plant virus pesticides. The compound has high inhibition activity on Xanthomonas axonopodis and Xanthomonas oryzae and can be used for preparing agricultural bactericides.

The invention provides an application of amaranthus in plant disease prevention and treatment, wherein amaranthus leaves are taken as the raw material and extracted by an organic solvent to obtain an extract, acidovorax avenae subsp.citrulli, xanthomonas axonopodis pv. Citri and rhizoctonia solani are selected as sites of action, and research on indoor bacteriostasis effect and in-vitro and pot culture control effects is performed to find that the amaranthus leaf extract has an inhibition effect on acidovorax avenae subsp.citrulli, xanthomonas axonopodis pv. Citri and rhizoctonia solani; and the in-vitro and pot culture tests also indicate that the amaranthus leaf extract has certain prevention and treatment effects on acidovorax avenae subsp.citrulli, xanthomonas axonopodis pv. Citri and rhizoctonia solani; and all the facts show that the amaranthus has prevention and treatment effects on the plant diseases in addition to edible and medical values. The research discovers and expands the functions of the vegetable, and simultaneously provides a new train of thought and a new way for studying and developing biopesticide for preventing and treating the plant diseases.

The invention relates to a 1,3,4-oxadiazole thioether compound as well as a preparation method and application thereof. The compound has a structure shown as a general formula (I) in the description.The compound has a good inhibition effect on pathogenic bacteria and fungi. By aiming at xanthomonas oryzae pv.oryzae, ralstonia solanacearum, cucumber xanthomonas oryzae, konjac xanthomonas oryzae, xanthomonas axonopodis pv.citri, botryosphaeria dothidea, bacterial canker and wilt of tomato, pseudomonas syringae pv.actinidae, Leucostoma cincta(Fr.:Fr.)Hohn, B.cinerea, F.oxysporum, S.sclerotiorum,G.zeae, P.infestans, P.cinnamomi and the like, good inhibition effects are achieved.

The invention discloses a phage flocculant and application of the phage flocculant in a fermentation post-treatment technology and belongs to the field of a microbial post-treatment technology. The phage flocculant is characterized in that the phage flocculant is a cationic flocculant, and a working concentration of the phage flocculant is 0.1-5% generally. The flocculant is applied in the fermentation post-treatment technology of a vibrio parahaemolyticus phage, a coliphage, a salmonella phage, a xanthomonas axonopodis phage, a ralstonia solanacearum phage, a staphylococcus aureus phage, a streptococcus agalactiae phage, a streptococcus iniae phage or a pseudomonas aeruginosa phage. The phage flocculant can play a role of rapid subsidence of bacteria, be convenient and quick to operate, reduce centrifugal equipment investment and manpower and material resource loss and meet requirements of industrial mass production of the phage, and is safe, nontoxic and harmless to animals and plants.

The invention relates to glycyrrhetinic acid-piperazine compounds containing an isopropanolamine substructure as well as a preparation method and application thereof. The compounds have structures asshown in a general formula (I) shown in the specification. On the basis of an 18beta-glycyrrhetinic acid compound, a nitrogen-containing fragment is introduced, and a series of 18beta-glycyrrhetinic acid-30-piperazine compounds containing isopropanolamine substructures are synthesized. The compounds have a good inhibition effect on plant pathogenic bacteria such as Xanthomonas oryzae pv.oryzae,Xooand Xanthomonas axonopodis pv.citri,Xac.

The invention belongs to the technical field of xanthomonas axonopodis, and specifically relates to application of the xanthomonas axonopodis. The xanthomonas axonopodis is xanthomonas axonopodis phage YHC5 which is preserved under the preservation number of No. CCTCC NO: M 2018579. 1 strain of the xanthomonas axonopodis phage YHC5 demonstrates no toxicity on normal microbial flora; and the DNA ofthe strain is unable to encode virulence genes. Moreover, the strain is good in stability, and can maintain good stability especially in environment with relatively strong acidity and basicity so that an excellent bacterial strain source is provided for development of new antibacterial agents; and thus, the strain has good application and development prospects.

The invention discloses a sucrose hydrolase mutant and belongs to the fields of gene engineering and enzyme engineering. The glucoside conversion activity of a monomutant enzyme obtained by modifyingsucrose hydrolase derived from Xanthomonas axonopodis pv.glycines, Janthinobacterium agaricidamnosum NBRC 102515 and Caulobacter crescentus NA1000 CB15 and respectively carrying out site-directed mutagenesis on serine residues on the 271st or 279th or 281st positions of the sucrose hydrolase is improved as comparison with that of a mild-type sucrose hydrolase. The sucrose hydrolase mutant is beneficial to the research on the glucoside conversion and hydrolysis mechanism of a glucoside hydrolase and can also be applied to industrial production of polysaccharide from the glucoside hydrolase.

The invention provides Bacillus for antagonizing blight and application thereof, wherein the strain has a scientific name of Bacillus siamensis FJAT-47582. The Bacillus siamensis FJAT-47582 is preserved in the China General Microbiological Culture Collection Center (CGMCC), with the preservation number of CGMCC NO. 15947. The Bacillus of the invention can not only inhibit fusarium oxysporum, xanthomonas axonopodis and other plant pathogenic bacteria, but also improve the vitality of plant seeds. The bacillus can be used for preventing and treating blight, and is a biocontrol bacterium being environment-friendly, economic and effective in terms of disease prevention and control.

The invention belongs to the technical field of biopesticides, and in particular relates to an antagonistic bacteria-Pseudomonas aeruginosa SU8. The Pseudomonas aeruginosa SU8 is preserved in China Center for Type Culture Collection in May 7th, 2013, the preservation number is CCTCC NO:M2013178. Ethyl acetate extract of Pseudomonas aeruginosa SU8 fermentation broth is compounded with validamycin to achieve the synergism on preventing and controlling rice sheath blight disease, and the ethyl acetate extract has an inhibiting effect on Xanthomonas oryzae pv. Oryzicola and Xanthomonas axonopodis pv. Citri.

The invention discloses a 1,2,4-triazole compound containing oxime carboxylate, and a preparation method and application thereof. The general formula (I) of the compound is described in the specification. In the formula (I), R is selected from a group consisting of a phenyl group, a 4-fluorophenyl group, a 4-chlorophenyl group, a 4-trifluoromethylphenyl group, a 4-nitrophenyl group, a 4-methoxyphenyl group, a 3,4-dimethyoxyphenyl group and a 3,4,5-trimethoxyphenyl group; R1 is a methyl group or ethyl group; and R2 is a methyl group. The compound provided by the invention has good biological activity in inhibition of Xanthomonas axonopodis pv.citri, Ralstonia solanacearum and Xanthomonas oryzae pv.oryzae.

The invention discloses a preparation method and a bacteriostatic activity of plant pathogen prevention and treatment compounds quinazolinone compounds containing a 1,2,4-triazolethione Schiff base, and concretely relates to compounds represented by general formula (I), and a preparation method thereof. The quinazolinone target compounds containing the 1,2,4-triazolethione Schiff base are synthesized from methyl ortho-aminobenzoate, methanamide, ethyl bromoacetate, hydrazine hydrate, carbon disulfide, potassium hydroxide and aromatic aldehyde through the steps of ring closure, alkylation, hydrazinolysis, salt formation, ring closure and a Schiff base reaction. Compounds F11 and F19 have better Xanthomonas oryzae and Xanthomonas axonopodis pv. citri inhibition activity than a contrast medicate bismerthiazol under 200mg / mL or 100mg / mL; and the synthesized compounds have medium to excellent Sclerotinia scleotiorum inhibition activity, and compounds F4, F5, F6, F8, F9, F17 and F25 have broad-spectrum inhibition activity on six test fungi.

The invention relates to a carbazole isopropanol diamine compound containing 1, 2, 3-triazole as well as a preparation method and application of the carbazole isopropanol diamine compound. The compound has a structure as shown in a general formula (I) which is described in the specification. Carbazole is used as a basis, and a nitrogen-containing fragment is introduced into the system to synthesize a series of isopropanolamine-containing substructures and 1, 2, 3-triazole carbazole compounds; the compound has an excellent inhibition effect on plant pathogenic bacteria such as xanthomonas oryzae pv. Oryzae, xanthomonas axonopodis pv. Citri and Pseudomonas syringae pv.

The invention relates to an acetoxyl ursolic acid piperazine compound containing an isopropanolamine substructure, and a preparation method and application of the acetoxyl ursolic acid piperazine compound. The compound has a structure disclosed in a following general formula (I): an ursolic acid compound is taken as a basis, a nitrogen-containing fragment is introduced into the system to synthesize one series of 3[beta]-acetoxyl ursolic acid-28-piperazine compound containing the isopropanolamine substructure, and the compound has a good inhibition effect on plant pathogenic bacteria, includingxanthomonas oryzaepv. oryzae, xanthomonas axonopodis pv. Citri and the like.

The invention relates to a pterostilbene amine compound containing an isopropanol aromatic ether structure as well as a preparation method and application of the pterostilbene amine compound. The compound has a structure as shown in a general formula (I) which is described in the description. On the basis of a pterostilbene compound, fragments containing various aromatic amines and heterocyclic amines are introduced into the system to synthesize a series of isopropyl alcohol aromatic ether pterostilbene compounds containing various amine structures, and the compounds have a good inhibition effect on plant pathogenic microorganisms, and especially has a good inhibition effect on plant pathogenic bacteria such as xanthomonas oryzae pv. oryzae, xanthomonas axonopodis pv. citri, pseudomonas syringae pv. actinidiae, and plant pathogenic fungi such as botryosphaeria dothidea, rhizoctonia solani and anthracnose of pitaya.

The invention discloses a biocontrol bacterial strain CH01 for efficiently preventing and treating citrus canker and an application of the biocontrol bacterial strain CH01. The biocontrol bacterial strain CH01 is bacillus cereus, and is assigned with the preservation number CGMCC NO.11677. It is shown from a flat inhibition test result the bacillus cereus CH01 can obviously inhibit growth of xanthomonas axonopodis pv. citri, and has an obvious inhibition effect on multiple pathogenic fungi. Further, the bacillus cereus CH01 shows great hydrolase activity in vitro. It is shown from a greenhousetest result that the bacillus cereus CH01 can effectively prevent development of citrus canker, and it is shown from a field trial result that the bacillus cereus CH01 has 65.46% of prevention effecton citrus canker. Therefore, the biocontrol bacterial strain CH01 can be used as a biocontrol preparation and efficiently prevent citrus canker.

The invention relates to an imidazole compound of 1,3,4-oxadiazolyl (thiadiazolyl) and a preparation method and application of the compound. The compound has a structure shown as a general formula (I)and a good inhibition effect on plant pathogenic bacteria such as xanthomonas oryzae pv.oryzae, xanthomonas axonopodis pv.citri and pseudomonas syringae pv.actinidiae.

The present invention relates to the use of dithiine-tetracarboximides of formula (I) for controlling selected bacterial harmful organisms in useful plants, wherein the bacterial harmful organisms are selected from the group consisting of Acidovorax avenae, Burkholderia spec., Burkholderia glumae, Candidatus Liberibacter spec., Candidatus Liberibacter asiaticus, Corynebacterium, Erwinia spec. (Dickeya, Pectobacterium carotovorum, Erwinia amylovora), Pseudomonas syringae, Pseudomonas syringae pv. actinidae, Pseudomonas syringae pv. glycinea, Pseudomonas syringae pv. tomato, Pseudomonas syringae pv. lachrymans, Pseudomonas tumefaciens (=Agrobacterium tumefaciens), Streptomyces spp., Xanthomonas spp., Xanthomonas ampelina, Xanthomonas axonopodis, Xanthomonas axonopodis pv. citri, Xanthomonas axonopodis pv. glycines, Xanthomonas campestris, Xanthomonas campestris pv. musacearum, Xanthomonas campestris pv. pruni, Xanthomonas campestris pv. Viticola, Xanthomonas fragariae and Xanthomonas transluscens or Xylella fastidiosa. The present invention also relates to a method for controlling the selected bacterial harmful organisms in useful plants by treatment with a dithiine-tetracarboximides of formula (I).

The invention discloses a method for inhibiting bacterial pustule of soybean. An inhibitor composition adopted in the method has an obvious inhibition effect on a pathogenic bacterium -Xanthomonas axonopodis pv. glycines of the bacterial pustule of soybean and consists of NiCl2, NaCl and ZnCl2 which have specific concentrations.

The present invention provides methods for development of a virulent bacteriophage-based treatment for the control of plant diseases caused by Xylella fastidiosa. The invention further provides methods of isolating and propagating bacteriophage virulent to X. fastidiosa in a Xanthomonas bacterial host and for treating or reducing symptoms of X. fastidiosa infection in a plant. The invention further provides methods of isolating and propagating bacteriophage virulent to Xanthomonas axonopodis pv. citri and for treating or reducing symptoms of Xanthomonas axonopodis pv. citri infection in a plant.

The invention discloses application of a micromolecular compound generated from bacteria as a synergist of a chemical pesticidal bactericide. The synergist is 3-oxydodecamoyl homoserine lactone (AHL)produced from PA (pseudomonas aeruginosa) and can be extracted from fermentation broth of the PA or artificially chemically synthesized. A trace amount of the micromolecular compound (AHL) is mixed with various chemical pesticidal bactericides to achieve an obvious synergistic effect on Xac (xanthomonas axonopodis pv.citri) killing. According to the invention, antibacterial effects of various chemical pesticidal bactericides can be remarkably improved, the using amount and residues of chemical pesticides are greatly reduced, the cost can be reduced, the environment can be protected, the problem of increasingly serious chemical resistance of pathogenic bacteria is effectively alleviated and achievement of a chemical reduction index and green development of agriculture are facilitated.

The invention relates to the field of microorganisms, and particularly discloses a cross-species cleavable xanthomonas phage as well as a composition, kit and application thereof. The xanthomonas axonopodis phage is xanthomonas phage GJ19P1 (Xanthomonas phage GJ19P1), and the preservation number is CCTCC NO: M 2020805. The phage has relatively high tolerance to ultraviolet and acid environments, and can achieve a relatively good control effect in different prevention and treatment environments. The composition contains at leasta strain of xanthomonas phage GJ19P1. The kit contains the xanthomonas phage GJ19P1 or the composition of the xanthomonas phage GJ19P1. The composition of the xanthomonas phage GJ19P1 is used for, but not limited to, killing xanthomonas.

A serratia marcescens strain T861 resistant to xanthomonas axonopodis pv. citri is preserved in CCTCC (china center for type culture collection) on 10, April, 2015, with the number of CCTCC M2015222. Fermentation liquor of the serratia marcescens strain T861 can suppress Xanthomonas axonopodis pv. citri; measurement by means of needle piercing shows that aseptic fermentation liquor of the serratia marcescens strain T861 has an in-vitro suppression rate for Xanthomonas axonopodis pv. citri being above 86.7%.

The invention relates to a pyridinium salt-containing N-(cinnamoyl)-N'-(substituted) propyl hydrazide compound, a preparation method and application thereof. The compound has a structure shown as general formula (I); the compound has a good inhibition effect on pathogenic bacteria and fungi, and has good inhibition effects on Xanthomonas oryzae pv. oryzae, Ralstonia solanacearum, cucumber bacterial blight bacteria,konjak bacterial blight bacteria, Xanthomonas axonopodis pv. Citri, botryosphaeria dothidea, Clavibacter michiganensis subsp.michiganensis, pseudomonas syringae pv. actinidiae, applecanker bacteria, cucumber botrytis cinerea, fusarium oxysporum, sclerotinia sclerotiorum, gibberella zeae, phytophthora infestans, P. cinnamomi and the like.

The invention relates to a preparation method and application of 6-fluoroquinazoline derivatives containing disulfide structures. The compound has a structure as shown in a general formula (I) which is described in the specification. According to the invention, 6-fluoroquinazoline is taken as a parent structure, disulfanyl (heterocyclic) structures are introduced into a system, so a series of 6-fluoroquinazoline derivatives containing the disulfide structures are synthesized; and the series of compounds have a very good inhibition effect on plant pathogenic bacteria such as rice bacterial leaf blight, ralstonia solanacearum, Pseudomonas syringae pv. actinidiae, Xanthomonas axonopodis pv. citri and the like.

The invention relates to 1, 2, 3, -triazole hydrazide or amide compounds as well as a preparation method and application thereof. The compound has a structure as shown in a general formula (I) which is described in the specification. On the basis of methyl 4-bromomethyl benzoate, a 1, 2, 3-triazole structure is introduced through a substitution reaction and a cycloaddition reaction, and then phenylhydrazine or aniline groups are introduced to the 1, 2, 3-triazole structure to synthesize a series of 1, 2, 3-triazole compounds containing hydrazide or amide groups; the compound has a good inhibition effect on fusarium graminearum, botryosphaeria dothidea, rhizoctonia solani, xanthomonas oryzae pv. Oryzae, xanthomonas axonopodis pv. Citri, xanthomonas axonopodis pv. Actinidia and the like.

The subject matter of the invention is a hydroxyapatite carrier, corresponding to the formula: Ca(10-x)Mx(PO4)(6-y)(CO3)y(OH)2 in which: M is chosen from Cu, Mg, Zn, Pb, Cd, Ba, K, Mn, Mo, Fe, Ag, B, Se or a combination of at least two of such elements; —x is comprised between 0 and 2, preferably between 0 and 1, more preferably between 0 and 0.8, even more preferably between 0.02 and 0.05; —y is comprised between 0 and 2, preferably between 0 and 1, more preferably between 0.002 and 0.030, The hydroxyapatite is a carrier of a bioactive substance chosen among a metal ion selected from Cu, Zn, S, Mn, Mg, K, Fe, B, Mo, Se and / or an extract of vegetal origin. The bioactive substances are active in the treatment of vascular diseases of plants, in particular: grapevine yellows (caused by grapevine phytoplasma), bacterial canker in kiwifruit (caused by Pseudomonas syringae), olive quick decline syndrome (caused by Xylella fastidiosa) and Citrus bacterial canker disease (caused by Xanthomonas axonopodis).

The invention discloses a bisamide compound containing 1, 3, 4-oxiadiazolyl as well as a preparation method and application of the bisamide compound. The compound has a structure as shown in a general formula (I). The compound takes an aryl bisamide compound as a base, introduces 1, 3, 4-oxiadiazolyl capable of improving the biological activity of a target compound into a system, so as to synthesize a series of bisamide compounds containing 1, 3, 4-oxiadiazolyl, the facts that the compound has a good inhibiting effect on infective pathogenic bacteria and viruses and has a good inhibiting effect on both pathogenic bacteria (such as bacteria of rice leaf blight and xanthomonas axonopodis) and plant viruses (such as tobacco mosaic virus) are found, and the compound provides an important scientific foundation for the research, development and creation of novel pesticides.

The invention relates to 1, 3, 4-oxadiazole compounds containing a morpholine group as well as a preparation method and application thereof. The compound has a structure as shown in a general formula (I) which is described in the specification. On the basis of a derivative containing a 1, 3, 4-oxadiazole group, a morpholine group capable of improving the biological activity of a target compound is introduced into the system. The compound has a good inhibition effect on pathogenic fungi and bacteria, such as Xanthomonas oryzae pv. Oryzae, Xanthomonas axonopodis pv. citri, fusarium oxysporum, and blueberry root rot.