51 results about "Cauliflower mosaic virus" patented technology

The invention discloses a plant expression vector Ppzp-35S-STOP1 of Tanba black soybean C2H2 zinc finger protein gene STOP1 and an application thereof for improving plant aluminum toxicity stress resistance. The vector is the plant expression vector containing constitutive promoter (35S) of cauliflower mosaic virus and C2H2 zinc finger protein gene STOP1 induced by the Tanba black soybean aluminum, the STOP1 gene is amplified from tanba black soybean roots, and the over-expression of the STOP1 gene in tobacco is controlled by utilizing the constitutive promoter, so that the aluminum toxicity resistance of the tobacco can be improved. The STOP1 transgene tobacco forcedly grows in solution containing 30microliters aluminum trioxide (AlCl3) for 24hours, the malic acid and the citric acid secreted from roots of the transgene tobacco as well as the aluminum resistance can be remarkably higher than that of a wild contrast plant, and the aluminum content on the root of the tobacco is remarkably lower than that of the wild plant.

The invention discloses application of a maize transcription factor VP1 in regulating crop plant height and grain starch content. The maize transcription factor VP1 is inserted into a plant expression carrier carrying a plant selection gene, a target gene is started by a maize combined type Ubiquitin promoter, a selectable marking gene hptII is started by a 35S promoter from cauliflower mosaic virus; through genetic transformation of maize embryo callus mediated by agrobacteria, transgenic plants are obtained in batch. According to the maize transcription factor VP1 in regulating the crop plant height and grain starch content, the plant height and grain characters of homozygous strains of a transgenic offspring are authenticated, as is shown, compared with a wild type plant, the plant height of an overexpression VP1 gene plant is reduced by about 35%, and the starch content of seeds is increased by around 3%. A new path is opened up for increasing the height of plants of graminaceous crops like maize, sorghum, rice, and wheat, and increasing the content of grain starch of the graminaceous crops.

The invention discloses a method for cultivating transgenic nitrogen-fixing plants. The method comprises the following steps: constructing recombinant expression vectors by using nucleotide sequences shown in SEQ ID NO: 3 and vectors with tobacco cauliflower mosaic virus 35S promoters; then importing the recombinant expression vectors into target plants so as to obtain transgenic plants with enhanced nitrogen-fixing capacity as compared with normal plants. In the method disclosed by the invention, based on the new functions of gma-miR172c found by the applicant, the gma-miR172c is overexpressed in target plants by using the genetic engineering method, thereby obtaining the transgenic plants with enhanced nitrogen-fixing capacity as compared with normal plants.

The invention pertains to a test technology of transgenic ingredients in food and feed, and especifically relates to a kit and a method for testing Roundup Ready transgenic Soybean and processed products thereof by using a loop-mediated isothermal amplification method. The kit comprises a loop-mediated isothermal amplification reaction solution A, a loop-mediated isothermal amplification reaction solution B, a Bst DNA polymerase C, a colour developing reagent D, and a positive control DNA E; the reaction solution A contains a reaction buffer, dNTP, magnesium sulfate, betaine, an upstream inner primer A: 5'-AGGTGGCACCTACAAATGCCATCGGCAGAGGCATCTTGAAC-3', a downstream inner primer A: 5'-TAGCTGGGCAATGGAATCCGAGGTCTCAGAAGACCAAAGGGC-3', an upstream outer primer A: 5'-TCCATCTTTGGGACCACTGT-3' and a downstream outer primer A: 5'-CGACACTCTCGTCTACTCCA-3'; and the reaction solution B contains a reaction buffer, dNTP, magnesium sulfate, betaine, an upstream inner primer B: 5'-AATCGAGCGGCGCCTCAGGCCGTAAGGAAGGCGACACC-3', a downstream inner primer B: 5'-AATGCCGCCACGGGCTCGTCGCCGATGAAGGTG-3', an upstream outer primer B: 5'-CCATGGGCGCCAGGAT-3' and a downstream outer primer B: 5'-ATCGGGCGCTTTGTGAG-3'. The method for testing the Roundup Ready transgenic Soybean and processed products thereof comprises the steps of the extraction of sample DNA, the loop-mediated isothermal amplification of cauliflower mosaic virus (CaMV) 35S promoter and Roundup Ready CP4-EPSPS gene and colour development test. The invention has the advantages of rapidness, strong specificity, high sensitivity, simple and convenient operation, good repeatability and low cost.

The invention discloses an infectious clone expression vector of watermelon mosaic virus, wherein the infectious clone expression vector is prepared by cloning whole genome of the watermelon mosaic virus, in a homologous recombination manner, to a binary vector, pCambia 0390, which contains the 35S promoter of cauliflower mosaic virus. The nucleotide sequence of the infectious clone expression vector of the watermelon mosaic virus is represented as the SEQ ID No.9. In the invention, for the first time, the infectious clone of the watermelon mosaic virus, which can be inoculated in a manner ofagrobacteria infiltration and stably and high-effectively infect muskmelons, Cucurbita pepo and the like host plants, can be obtained; the infectious clone also can high-effectively express a heterologous protein.

There is provided a novel Campanula flavonoid 3′,5′-hydroxylase gene, and a plasmid comprising the gene under the control of the cauliflower mosaic virus 35S promoter.

The present invention is directed to a method of Acacia mangium regeneration through organogenesis and a method of genetic transformation of Acacia mangium. The method of regeneration comprises inducing callus from different parts of seedlings and vegetatively micropropagated plantlets as explants; adventitious bud induction followed by pinnate leaf and bud elongation and eventually, elongated shoots were induced to root. Based on the regeneration system, a marker gene GUS under cauliflower mosaic virus promoter was introduced to Acacia mangium via Agrobacterium infection. GUS staining in the regenerated plants and Southern blot hybridization prove the incorporation of the foreign gene into the host genome and expression of the foreign gene.

The invention discloses a potato leaf roll virus infectious clone and a construction method thereof. The potato leaf roll virus infectious clone is obtained by cloning a whole genome of a potato leafroll virus into a pCB301 binary vector containing a cauliflower mosaic virus double 35S promoter in a homologous recombination mode. The potato leaf roll virus infectious clone which can be inoculatedby an agrobacterium infiltration method and stably and efficiently infects host plants such as nicotiana benthamiana and potatoes is prepared for the first time, and the potato leaf roll virus infectious clone has important significance for preventing and treating potato leaf roll virus diseases.

A nest polymerase chain reaction (PCR) detecting method of a transgenic crop cauliflower mosaic virus relates to the field of molecular biology. The method designs two specificity outer primers and adopts a CaMV35S promoter published by an announcement NO. 953-6-2007 of a ministry of agriculture to detect a primer serving as an inner primer according to a conserved sequence of a cauliflower mosaic virus CaMV35S promoter, and the group of primers can detect the cauliflower mosaic virus CaMV35S promoter in different transgenic crops and has the characteristic of a broad spectrum. The detecting method has the advantages of being efficient, sensitive, accurate and the like, can avoid a 'false negative' result, and can effectively solve the technical problem of detecting transgenic crops. The nest PCR detecting method can provide technical support for agricultural transgenic organism safety management directly, can conduct effective monitoring on research, production and sales of transgenic crop products, and has important meaning on guaranteeing health of people, environment safety and biodiversity.

The invention pertains to a test technology of transgenic ingredients in food and feed, and specifically relates to a primer pair used for testing a common promoter used for transgenic plants in food and feed, namely, cauliflower mosaic virus (CaMV) 35S promoter. The invention designs a pair of specific primers, aiming at the cauliflower mosaic virus (CaMV) 35S promoter and according to the genetic conserved sequence thereof. The primer pair is used and a loop-mediated isothermal amplification technology is adopted for rapidly, sensitively and specifically testing the CaMV 35S promoter, thus screening whether the products contain transgenic plant ingredients. The primer can also be provided in kit and together with other reagents and used for nucleic acid amplification. The method has simple and convenient operation and good repeatability.

The present invention discloses a gene combination expressing and producing betacyanin in rice, and an application thereof. The gene combination comprises a melo gene, a BvDODA1 gene and a BvCYP76AD1gene. Based on codon preferences of rice, the melo gene is optimized as a meloS gene and a nucleotide sequence is shown as SEQ ID NO.1; the BvDODA1 gene is optimized as a BvDODA1S gene and a nucleotide sequence is shown as SEQ ID NO.2; the BvCYP76AD1 gene is optimized to a BvCYP76AD1S gene and a nucleotide sequence is shown as SEQ ID NO.3; the three genes are respectively fused with a 35S promoterof a cauliflower mosaic virus and a NOS terminator of agrobacterium rhizogenes, corresponding gene expression cassettes are respectively constructed, then the gene expression cassettes are ligated into plant expression vectors to obtain polygenic plant transforming vectors containing the three gene expression cassettes, and the vectors are transformed into rice to obtain betacyanin-enriched transgenic rice which has a betacyanin content about 2.0-2.6 mg/g FW.

The present invention discloses an alfalfa aluminum induced malic acid channel protein gene plant expression vector pK2-35S-MsALMT1, which is a plant expression vector containing a constitutive promoter (35S) of cauliflower mosaic virus and alfalfa aluminum induced malic acid channel protein gene MsALMT1. According to the present invention, MsALMT1 gene is amplified from alfalfa, and a constitutive promoter is adopted to control overexpression of the MsALMT1 gene in tobacco so as to improve aluminum toxicity resistance of the tobacco; and experiment results show that: after the trans-MsALMT1 gene tobacco is subjected to stress growth for 24 h in a solution containing 30 muM of AlCl3, malic acid secreted by root tip and aluminum resistance of the trans-MsALMT1 gene tobacco are significantly higher than malic acid secreted by root tip and aluminum resistance of the wild-type control plant, and aluminum content in root tip of the trans-MsALMT1 gene tobacco is significantly lower than aluminum content in root tip of the wild-type plant.

The invention relates to plant function genomics, in particular to the application of a barley HvHKTI gene in building transgenic plants, wherein after the separation and cloning of a HvHKT1gene coding sequence (coding sequence), the coding sequence is connected with a promotor of a mosaic virus of a cauliflower, and then arabidopsis is converted; and finally evaluation is conducted for salt endurance of the transgenic arabidopsis and the wild type Arabidopsis. According to the invention, the salt endurance of the transgenic plants is improved, and the barley HvHKT1 gene has a nucleotide sequence shown by SEQ ID NO:1.

The invention belongs to the field of plant gene engineering, and specifically involves the separation and clone, function identification and application of DNA fragment (gene) for regulating rice gibberellin synthesis. The said gene OsHOX4 relates to the rice gibberellin synthesis. The invention includes: combining the complete coding sequence of the said gene with Cauliflower mosaic virus promoter CaMV35S, transferring into rice directly, the transgenic plants are obviously shorter than wild control plants, the transgenic plants can recover to normal height under the effect of exogenous gibberellin (GA3), it is found by further analysis that the expression of gibberellin oxidase (OsGA3ox2) in transgenic plants is inhibited, showing that OsHOX4 can regulate the expression of OsGA3ox2 and control the synthesis of gibberellin.

The invention discloses construction of a pest-resistant gene T-DNA vector and application thereof. A compound promoter is used for promoting expression of a pest-resistant gene; the compound promotercontains a cauliflower mosaic virus (CaMV) 35S promoter and an intron sequence of rice actin Actin1; the pest-resistant is formed by connecting Cry1Ab and Vip3A through a connecting peptide. After being built, a recombinant vector is transferred into corn, so that the expression volume of pest-resistant protein in transgenic maize is obviously increased. The recombinant vector disclosed by the invention can be used for preparing cells of a pest-resistant plant; the pest-resistant plant comprises maize, rice and the like. A transgenic plant transformed from the recombinant vector disclosed bythe invention can efficiently kill main lepidoptera pests such as armyworm, prodenia litura, european corn borer, cotton bollworm and beet armyworm.

The invention relates to an application of grape VlKNOX gene for promoting cytokinin synthesis and regulating fruit setting, and belongs to the technical field of plant genetic engineering. In the invention, a transgenic technology of a strong promoter (cauliflower mosaic virus 35S promoter) driving principle is utilized to transfer an excess-expression vector of a VlKNOX gene into Arabidopsis thaliana so as to obtain a transgenic Arabidopsis thaliana plant. Experiments prove that: compared with an Arabidopsis thaliana transformed with an empty vector, excessive expression of the VlKNOX gene leads to large accumulation of cytokinins in the transgenic Arabidopsis thaliana, and the fruit setting rate of fruits is obviously improved. Therefore, the grape VlKNOX gene and the recombinant expression vector thereof can be used for breeding high-yield plant variety.

The invention discloses a plant green tissue-specific expression promoter pGreen. A nucleotide sequence of the promoter is shown as SEQ ID NO:1. The plant green tissue-specific expression promoter pGreen comprises an enhancer sequence of a 35S promoter of a Cauliflower mosaic virus of tobacco and a promoter sequence which is separated from a maize PD450 gene. The invention also discloses application of the plant green tissue-specific expression promoter pGreen to the preparation of transgenic plants with insect resistance, and application of the plant green tissue-specific expression promoter pGreen to the improvement on the anti-insect activity of plants.

A fluorescence PCR qualitative determination for transgene crop probe sequence containing cauliflower mosaic virus 35S promoter gene and reagent kit thereof, the probe sequence includes, the probe sequence formed in the region by the extension of the sequence tgcctctgccgacagtggtcccaa upstream by 5 bases and downstream by 5 bases. The reagent kit comprises nucleic acid extraction reagent, and nucleic acid amplification reagent, the nucleic acid amplification reagent comprises 35sPCR reaction solution, 18s-rRNAPCR reaction solution, Taq enzyme (5U/ul), UNG (1U/ul), and comparison article. The detecting sensibility of the reagent kit to the transgene crops to the cauliflower mosaic virus 35s promoter gene can reach 0.1%, and has good sensibility and specificity, As the plant endogenous gene 18S-rRNA is used as an internal standard in the reagent kit, false negative can be prevented, and as the result of real time monitoring to the PCR product, testing time is saved substantially, manpower and expenditure consumption is also reduced.

The present invention provides the primar sequences for nucleic acid amplification of the transgenic crop containing caulimovirus 35s promotor, they are contained in the extended regional range of four pairs of optimal primer sequences, and the extended regional range of every pair of primer sequence is: the primer pair is formed from upstream primer and downstream primer, in the upstream primer position of said primer pair 10 bases are forward extended and 10 bases are backward extended, and in the downstream primer position 10 bases are forward extended and 10 bases are backward extended, in the regional range of upstream and downstream extended positions of said primer pair the primer sequence can be obtained.

The invention relates to a recombinant plasmid for detecting components in a transgenic plant, the plasmid comprises a vector and a gene fragment, and the plasmid is characterized in that the gene fragment is formed by fusion of the specific sequence of chloroplast RBCL genes, the specific sequence of a cauliflower mosaic virus 35S (CaMV35S) promoter and the specific sequence of an agrobacterium tumefaciens (NOS: nopaline synthase) terminator, wherein the specific sequence of the chloroplast RBCL genes is as shown in SEQ ID No. 1 (sequence identity number 1); the specific sequence of the CaMV35S promoter is as shown in SEQ ID No. 2; and the specific sequence of the NOS terminator is as shown in SEQ ID No. 3. The recombinant plasmid and a multiplex PCR (polymerase chain reaction) kit matched with the recombinant plasmid can be used for multi-target-point qualitative detection of the transgenic plants and products thereof and have the advantages of being convenient and fast.

The invention relates to a grape VyLhcb4 gene as well as an encoding protein and application thereof in breeding a stress-resistant variety and belongs to the technical field of plant gene engineering. By adopting a transgenic technology of a strong promoter (cauliflower mosaic virus promoter 35S), an over-expression vector of a Yanshan grape VyLhcb4 gene is transferred into arabidopsis thaliana,so that a transgenic arabidopsis thaliana plant is obtained. Experiments show that compared with an arabidopsis thaliana plant with a transferred empty vector, the transgenic arabidopsis thaliana plant has improved stress resistance since related stress-resistant substances are accumulated and a related stress-resistant gene is expressed in transgenic arabidopsis thaliana since the VyLhcb4 gene isover-expressed. Therefore, the grape VyLhcb4 gene and a recombinant expression vector thereof can be applied to breeding of stress-resistant plant varieties.

The invention, which belongs to the technical field of plant genetic engineering, relates to a grape VyCYP89A2 gene and encoding protein thereof as well as application of the grape VyCYP89A2 gene in drought-resistant variety breeding. According to the invention, an overexpression vector of the Yanshan grape VyCYP89A2 gene is transferred into arabidopsis thaliana by using the transgenic technologyof a strong promoter (cauliflower mosaic virus 35S promoter) driving principle, so that a transgenic arabidopsis thaliana plant is obtained; the experiment proves that compared with an arabidopsis thaliana plant with a transformed empty vector, accumulation of related stress resistance substances in transgenic arabidopsis thaliana and expression of drought resistance related genes are caused by overexpression of the VyCYP89A2 gene, so that the drought resistance of the transgenic plant is enhanced. The grape VyCYP89A2 gene and the recombinant expression vector of the grape VyCYP89A2 gene can be used for breeding drought-resistant varieties of plants.