81 results about "Phytophthora nicotianae" patented technology

The invention discloses bacillus amyloliquefaciens and the microbial inoculum and application thereof. Bacillus amyloliquefaciens is a Latin name, the strain number is HC200, and the accession number in the China General Microbiological Culture Collection Center is CGMCC No.10371. The bacillus amyloliquefaciens has a selective antagonism effect on biocontrol bacteria and pathogenic bacteria and has a strong inhibiting effect on fusarium oxysporum, fusarium solani, phytophthora nicotianae and ralstonia solanacearum, and has a good synergetic antagonism effect on pathogenic bacteria by being matched with trichoderma viride H06.

The invention belongs to the technical field of plant protection, and discloses a method of inducing phytophthora nicotianae breda de haan bacteria to generate sporangiums and release zoospores. The method comprises the following steps: activating the phytophthora nicotianae breda de haan bacteria, preparing the induction liquid generating sporangiums and inducing to generate sporangiums and release zoospores. According to the invention, the used induction liquid is the Bache wild vegetable composite fruit and vegetable juice with the volume concentration of 15-25 percent and the compound fertilizer solution with the mass concentration of 0.05-0.20 percent, and when the phytophthora nicotianae breda de haan is induced to generate the sporangiums, the continuous illumination culture is performed under the white fluorescent lamp. The method provided by the invention is simple, convenient, rapid and pollution-free, and can be used for the researches on virulence determination of the phytophthora nicotianae breda de haan bacteria, the biological activity assay of the phytophthora nicotianae breda de haan bacteria by the sterilizing agent, the evaluation of disease resistance of an epidemic disease by the luffa varieties and the like.

The invention discloses a Phytophthora nicotianae molecule detection primer and a detection method thereof, specially used for the specific molecule detection of Phytophthora nicotianae. A pair of specific primers of the Phytophthora nicotianae (comprising an upstream primer YhF:5'-GACATGATATCAACTGTTCTGCAG-3' and a downstream primer YhR:5'-CCTTGGATCTTCTCTCGATAAG-3') are mainly designed, and an amplified product having a fragment length of 342bp can be specially amplified on the pure DNA and bacteria bearing pathogenic tissues of the Phytophthora nicotianae through PCR amplification and agarose gel electrophoresis. The primer and the method can be used for the rapid, sensitive and specific detection of the Phytophthora nicotianae in Phytophthora nicotianae infected plant tissues in the production practices, can be used for the early stage diagnosis of field diseases and the monitoring and identification of pathogens, and provide reliable technologic and theoretic bases for the control of diseases caused by the Phytophthora nicotianae.

The invention relates to an LAMP detection kit for dendrobium officinale-phytophthora nicotianae, which comprises a primer, a reaction buffer solution, a Bst DNA polymerase and a nucleic acid dye. The invention also relates to an LAMP detection method for dendrobium officinale-phytophthora nicotianae. After the kit disclosed by the invention is adopted for carrying out LAMP detection, the high-specificity, rapid, efficient, high-sensitivity and simple molecular detection on dendrobium officinale-phytophthora nicotianae can be realized.

The invention belongs to a method for genetic transformation and regeneration of a eucalyptus, and particularly relates to the method for genetic transformation and regeneration by taking hypocotyledonary axis of an aseptic seedling of a eucalyptus urophylla as an explant. The hypocotyledonary axis of the seedling of the eucalyptus urophylla is taken as the explant, calluses are pre-cultured and induced, co-culture transformation is performed with agrobacterium tumefactions carrying exogenous genes, kanamycin is used for selection, and adventitious bud induction, bud proliferation, adventitious bud growth, rootage and transplantation are performed for getting a plant to be transformed. PCR (polymerase chain reaction) detection and RT-PCR (reverse transcription-polymerase chain reaction) detection prove that, as for the obtained plant of the eucalyptus urophylla to be transformed, the exogenous genes are introduced into a genome of the eucalyptus urophylla and expressed; the transformed plant having better resistance to phytophthora nicotianae is found in the anti-disease detection of in vitro blades of the eucalyptus urophylla of a reverse radish-anti-fungal protein (RS-AFP2); and the relevant enzyme activity determination result of the resistance shows that, after inoculation of the transformed plant, the activities of L-phenylalanin ammo-nialyase (PAL), peroxidase (POD) and polyphenol oxidase (PPO) are enhanced.

The invention relates to a recombinant nucleotide sequence as shown in SEQ ID NO. 3 and used for encoding Omega-3 desaturase from Phytophthora nicotianae, a vector containing the Omega-3 desaturase, and a recombinant microorganism containing the vector, in particular recombinant Saccharomyces cerevisiae and also relates to a construction method of the recombinant Saccharomyces cerevisiae as well as application of the Saccharomyces cerevisiae containing the desaturase in the biological synthesis of polyunsaturated fatty acids. The Saccharomyces cerevisiae can catalyze C20:4<Delta5,8,11,14> into C20:5<Delta5,8,11,14,17> at normal temperature, with catalytic efficiency up to 65%.

The invention discloses a method for phytophthora nicotianae inoculation of tobacco. The method for the phytophthora nicotianae inoculation of tobacco includes steps that (1) preparing for tobacco seed plantlets; (2) preparing phytophthora nicotianae zoospore suspension; (3) irrigating the roots to inoculate; (4) counting the morbidity situation, and evaluating the disease resistant result. The zoospore inoculated to the roots of the seed plantlets can be quantified rigidly, the resistant difference between the same variety due to excessive inoculation amount is avoided, and the resistance identification is more precise and effective; in the actual operation, the inoculation can be performed in quantities, the space usage is small, the labor cost is saved, and the experiment period is shortened. The method for the phytophthora nicotianae inoculation of tobacco is suitable for popularization.

The invention discloses an isoquinoline tricyclic alkaloid compound as well as a preparation method and application thereof. The compound is obtained by taking a whole plant of Thalictrum glandulosissimum as a raw material and by steps of extraction with ethyl acetate, silica gel column chromatography and high-pressure liquid chromatography separation and purification. The structural formula of the compound is C16H15NO2, and the compound has the following structural formula shown in the specification. The compound is named as 1-(2,2-dimethyl-2H-pyrano[2,3-g]isoquinolin-6-yl)ethanone. The inhibitory effect of the compound on Phytophthora nicotianae is remarkably superior to that of agricultural streptomycin, and the control effect on tobacco black shank reaches (71.5 +/- 3.2)%. The raw material is widely distributed, high in biological yield and high in alkaloid content. The compound preparation process is simple, the production cost is low and the compound is prone to industrial application.

The invention provides a strain of paenibacillus kribbensis and a preparation and application thereof and belongs to the technical field of agricultural production and biocontrol microbial technology.The preservation number of the paenibacillus kribbensis is CGMCC No.17248. The provided paenibacillus kribbensis has a remarkable bacteriostatic activity on phytophthora nicotianae and fusarium, andthe bacteriostatic rates on phytophthora nicotianae and fusarium both exceed 70%. By applying the provided paenibacillus kribbensis to planting of tobacco, the growth of tobacco plants can be significantly promoted, and the yield and output value of the tobacco are increased.

The invention provides a PCR (Polymerase Chain Reaction) detection primer for phytophthora capsici leonian. The primer comprises Enl4s and Enl1a (as shown in Seq ID No.1 and 2). Four pairs of specific primers capable of quickly detecting phytophthora capsici leonian germs can be obtained based on the sequence difference between the Enl and Ypt genes of the phytophthora capsici leonian and other phytophthora nicotianaes: Enl2s/Enl3a, Enl4s/Enl1a, Ypt2s/Ypt3a and Ypt2s/Ypt5a, wherein the sensitivity of Enl4s/Enl1a is the highest. A PCR detection system is established on the basis, which is capable of quickly and accurately detecting the phytophthora capsici leonian from complex pathogenic bacteria environments in the tissues of plants having diseases and soil. A detection kit established according to the method is simple and convenient for operation, good in specificity and high in sensitivity; and the detection kit is capable of detecting the propagules in various forms of the phytophthora capsici leonian, such as hypha, oospore, zoospore and the like, thereby having great significance in the aspects of early warning on the epidemic situation of the phytophthora capsici leonian, pathogen supervision on the epidemic area and the like.

The invention relates to a microbial fungicide and a preparation method and an application thereof. The method comprises the following steps: extracting a mushroom broth by an extractant, concentrating the material to a paste, and the paste and an auxiliary agent are used according to the mass volume ratio of 1g: 5mL to prepare the product. The mushroom broth extract fungicide contains natural antibacterial active metabolite, has wide-spectrum antibacterial and antifungal activities, can be used for inhibiting escherichia coli, pseudomonas solanacearum, tritirachium album, tobacco alternaria alternate and tobacco phytophthora, and can be used for preparing a food antiseptic or a biological pesticide. The preparation method is efficient, the obtained fungicide is the microbial source fungicide, and has the advantages of low toxicity and low residue.

The invention relates to bacillus subtilis MC4-2 and application thereof, belongs to the technical field of agricultural microorganisms, and provides bacillus subtilis with the strain number of MC4-2and the preservation number of CGMCC (No.15975, and the bacillus subtilis MC42 is named as bacillus subtilis in a classified manner. The bacillus subtilis MC4-2 fermentation broth MC4-2 has a good inhibition effect on Phytophthora nicotianae, can be used as a living microbial agent and a metabolite dosage form for processing and development, is used for prevention and control of Phytophthora nicotianae, and is good in effect and low in cost.

The invention discloses a method of utilizing biomass charcoal to inhibit phytophthora nicotianae. The method includes the following steps: firstly, configuring and adding a biomass charcoal medium; secondly, adjusting pH with the added biomass charcoal medium to be original pH of the medium; and thirdly, configuring bacteria soil. The method is simple, is convenient to use, and has a great effect to inhibit phytophthora nicotianae. Two types of biomass charcoal different in proportion are added separately or added together to an oat medium, the influence of biomass charcoal on phytophthora nicotianae is determined through determination of relevant indexes, and relevant experiments are designed to conduct mechanism verification on the basis of the property of biomass charcoal. Brown soil is selected and rice husk charcoal with different proportions is added in a potted condition to verify an effect of biomass charcoal on phytophthora nicotianae prevention. Therefore, theoretical bases are provided for reasonable applications of biomass charcoal and related research and comprehensive control and treatment of phytophthora nicotianae.

The invention discloses a real-time observation method for phytophthora nicotianae infection process. The real-time observation method for the phytophthora nicotianae infection process includes that preparing for tobacco seed plantlet, preparing phytophthora nicotianae zoospore suspension, irrigating the root to inoculate, dyeing and observing. According to the real-time observation method for the phytophthora nicotianae infection process, phytophthora nicotianae inoculation can be performed in a manual climatic box or a culture room by means of culture dish sponge and filter paper for preserving moisture, and the dyed and discolored seed plantlet radicle can be directly observed under a microscope. The real-time observation method for the phytophthora nicotianae infection process is convenient and easy to operate and suitable for observing the phytophthora nicotianae infection process of tobacco and detecting the resistance of different varieties.

The invention relates to a test method for inhibiting Phytophthora nicotianae. A plate dilution coating method is adopted to separate rhizosphere soil microorganisms of healthy tobacco plants in the tobacco field with the tobacco black shank disease, and two antagonistic bacteria and three Trichoderma spp. are screened out from Phytophthora nicotianae by a plate confrontation test; and the numberof two antagonistic bacteria is B1 and B2 respectively, and the single-bacterium bacteriostatic rates of both of the bacteria are more than 80 percent, wherein the inhibition rate of the B1 to Phytophthora nicotianae is more than 90 percent, and both of the bacteria are identified to be paenibacillus polymyxa; the number of the three Trichoderma strains are YCS-Tr1, YCS-Tr2 and YCS-Tr3 respectively, the single-bacterium bacteriostatic rates of the strains are more that 94%, and the three strains are identified as green Trichoderma spp., Trichoderma paraviridescens and Trichoderma koningiopsisrespectively. The test data analysis obtains the strain combination mode with the optimal bacteriostatic rate, is beneficial to more accurately implementing the prevention and treatment work of inhibiting the Phytophthora nicotianae in the later field application, and provides a reference test method for acquiring a composition for efficiently and stably inhibiting the Phytophthora nicotianae.

The invention belongs to the technical field of biological fermentation engineering, and specifically relates to a high-yield paenibacillus polymyxa strain and an application thereof. Paenibacillus polymyxa YSD7 is preserved at China General Microbiological Culture Collection Center on December 5, 2019, and a preservation number is CGMCC 19087. The paenibacillus polymyxa YSD7 can prevent and treaterwinia carotovora, taro soft rot bacteria, phytophthora nicotianae, flower root rot bacteria, bipolaris sorokiniana, cercospora personata, or polygonatum root rot bacteria. The inventors finally obtain the paenibacillus polymyxa strain YSD7 with relatively good growth vigor through the combination application of ultraviolet mutagenesis and diethyl sulfate mutagenesis technology, and qualitativescreening breeding based on the existing strain. Preliminary experimental results show that the highest fermentation activity of the YSD7 strain can reach 9.5 billion/mL, the YSD7 strain shows relatively good growth effects, and a good technical foundation for the preparation of paenibacillus polymyxa microbial preparation products can be laid.

The invention discloses bacillus subtilis GUMT323, which is collected in the China Center for Type Culture Collection, with the collection number of CCTCC NO: M 2018873. The invention further discloses application of the bacillus subtilis GUMT323 to control of tobacco black shank. The bacillus subtilis GUMT323 has an obvious ability of antagonizing both phytophthora nicotianae and the ability of antagonizing pepper anthracnose.

The invention relates to the technical field of fruits and vegetables seedling, and in particular relates to a strawberry seedling cultivating method capable of resisting a continuous cropping obstacle. The method comprises the steps of soaking strawberry seeds in a saturated salt water solution for soaking in a vacuum environment, soaking the strawberry seeds in scale mucus, sowing the strawberry seeds in garden soil of continuously cropping strawberry, and irrigating with a nitrobacteria solution; successively inoculating strawberry blonde monospora, fusarium oxysporum, phytophthora nicotianae, bacillus anthraci, sphaerotheca fuligine and botryis cinerea into young stems and leaves of the strawberry by stages, inoculating the fungi or viruses and timely spraying 5%-10% calamine water suspension, an allium caelureum extract liquid, a sweet pomegranate rind extract liquid, a lantern plant calyx extract liquid, 5% sodium sulfate solution and 0.05% hydrogen bromide water solution separately; and reserving the finally healthy strawberry seedlings. The treated strawberry seedlings are extremely high in disease resistance and can show relatively high disease resistance and high yield when planted into a continuous cropping field.

The invention relates to Bacillus tequilensis D5-8 and application thereof, and belongs to the technical field of agricultural microorganisms. The strain number of the Bacillus tequilensis is D5-8, the preservation number is CGMCC No. 15973, and the Bacillus tequilensis is classified and named as Bacillus tequilensis. The Bacillus tequilensis D5-8 fermentation liquor D5-8 has a good inhibiting effect on Phytophthora nicotianae, can be used as a dosage form of a living microbial agent and a metabolite for processing and development, is used for preventing and controlling the Phytophthora nicotianae, and is good in effect and low in cost.

The invention discloses bacillus subtilis GUMT332 collected in CCTCC (China Center for Type Culture Collection), with the collection number of CCTCC NO:M 2018874. The invention also discloses an application of the bacillus subtilis GUMT332 in control of phytophthora nicotianae. The bacillus subtilis GUMT332 has obvious capacity for antagonizing the phytophthora nicotianae and chili anthracnose.

The invention discloses a method for determining pathogenicity of phytophthora nicotianae through pumpkin chips. The method comprises the following steps of 1, preparation of phytophthora nicotianae hypha blocks; 2, preparation of pumpkin chips; 3, inoculation; 4, pathogenicity determination and evaluation. The method is simple, convenient to use and easy to implement; pathogenic bacteria are stable in pathogenicity expression, repeatability is good, the result is reliable, and the pathogenicity and pathogenic strength of phytophthora nicotianae can be accurately reflected; during actual operation, batch operation can be conducted, the method has the advantages that the occupied space is small, labor cost is reduced, and the experimental period is shortened, and therefore the method is suitable for application and popularization.