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GbRPS1 gene for resisting plant fusarium wilt and verticillium wilt and application thereof

A plant resistance technology, applied in the field of broad-spectrum disease resistance protein, can solve the problem of no significant resistance to Fusarium wilt and Verticillium wilt

Inactive Publication Date: 2012-01-18
左开井 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese scientists have transformed genes such as chitinase and peroxidase into susceptible varieties of cotton, which have a certain effect on improving the resistance of cotton to Fusarium wilt and Verticillium wilt, but the above genes are not effective for Fusarium wilt and Verticillium wilt No significant resistance

Method used

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  • GbRPS1 gene for resisting plant fusarium wilt and verticillium wilt and application thereof
  • GbRPS1 gene for resisting plant fusarium wilt and verticillium wilt and application thereof
  • GbRPS1 gene for resisting plant fusarium wilt and verticillium wilt and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Example 1 Cloning of GbRPS1 gene against Fusarium wilt

[0071] (1) Construction of the cDNA library of the sea island cotton root

[0072] The library construction method is implemented using Stratagene's cDNA library construction kit. The specific steps of the method are as follows.

[0073] The sea island cotton variety Pima-90 can be used to extract total RNA from cotton after being treated with Verticillium dahliae (Verticillium dahliae) for 2 hours. Weigh 0.5 g of sea island cotton young roots, grind them into fine powder with liquid nitrogen, and divide them into two 1.5 ml eppendorf tubes. Add 1ml TRIZOL to each tube and shake vigorously to make the mixture uniform, and leave it at room temperature for 5 minutes. After centrifugation at 4°C and 12,000 g for 10 min, the supernatant was sucked into a clean 1.5 ml eppendorf tube. Add 0.2ml chloroform to each tube, shake vigorously for 15s, and leave it at room temperature for 2 to 3 minutes. Then centrifuge for 15 min...

Embodiment 2

[0084] Example 2 Artificial synthesis of GbRPS1 protein gene resistant to Fusarium wilt

[0085] According to the completed nucleotide sequence containing the 2712bp coding region, firstly, it is divided into 8 segments to synthesize a single-stranded oligonucleotide fragment with a length of about 150-200bp and a sticky end according to the sequence of the plus strand and the side strand respectively. The 8 complementary single-stranded oligonucleotide fragments corresponding to each of the positive strand and the secondary strand are annealed separately to form 8 double-stranded oligonucleotide fragments with sticky ends. Mixed double-stranded oligonucleotide fragment, after T 4 DNA ligase catalyzes the assembly into a complete GbRPS1 gene. The synthetic DNA fragment contains the nucleotide sequence at positions 202-2916 in SEQ ID NO:1, and the synthetic gene contains XbaI and SacI sites at both ends.

[0086] The artificially synthesized 5'and 3'end restriction sites are XbaI a...

Embodiment 3

[0087] Example 3 Construction of plant expression vector for broad-spectrum resistance GbRPS1 gene

[0088] The specific method for constructing the plant expression vector of the broad-spectrum resistance GbRPS1 gene is as follows:

[0089] A. pBI121 and pCAMBIA2301 were digested with HindIII and EcoRI, and the fragment of pBI121 with p35S-GUS-Nos-ter was connected to pCAMBIA2301 to form the intermediate vector p35S-2301-GUS;

[0090] B. Double cut p35S-2301-GUS and the synthetic GbRPS1 gene with XbaI and SacI, and replace GUS at the corresponding restriction site of p35S-2301-GUS with GbRPS1 to obtain the GbRPS1 gene plant expression vector ( figure 1 ). Then it was transformed into the Agrobacterium line LBA4404 for transformation of cotton.

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Abstract

The invention provides a GbRPS1 gene which can improve the resistance of plants to fusarium wilt and verticillium wilt, GbRPS1 protein polypeptides coded by the GbRPS1 gene, and a method for producing the GbRPS1 protein by recombination technology. The invention also discloses the functions and applications of the GbRPS1 gene in broad-spectrum disease resistance in the resistance to fusarium wiltand verticillium wilt.

Description

Technical field [0001] The invention relates to a broad-spectrum disease-resistant protein isolated from a constructed sea island cotton cDNA library that can resist cotton fusarium wilt and verticillium dahliae. Background technique [0002] There are many plant pathogenic microorganisms in the natural environment, and the outbreak of diseases caused by them will lead to a substantial reduction in crop yields, or even no harvest. Therefore, improving plant disease resistance to ensure crop yield is an important direction for crop genetic improvement. [0003] In the long-term evolutionary process, plants have gradually formed a series of complex and effective protection mechanisms: (1) The cell wall of plants is an effective barrier for plants to effectively prevent the invasion of pathogens; (2) When pathogens pass through the plant cell wall, plants pass through and interact with pathogens. The biological elicitor recognizes each other and produces a pathogen-related resistance...

Claims

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Application Information

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IPC IPC(8): C07K14/415C12N15/29C12N15/63C12N5/10C12N1/15C12N1/19C12N1/21C12P21/02A01H5/00
Inventor 左开井王劲陈继军黄逸群
Owner 左开井
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