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Plant polygene expression carrier, transforming factor containing said carrier and its application

An expression vector and multi-gene technology, applied in the field of plant genetic engineering, can solve problems such as the influence of transgenic plant traits, physiological function interference, etc., and achieve the effects of good glyphosate resistance and good insect resistance.

Inactive Publication Date: 2004-03-03
SUN YAT SEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these Bt gene products are generally in the cytoplasm, and the high-level expression and accumulation of foreign proteins in the cells will inevitably interfere with the physiological functions of the cells themselves, and affect some traits of transgenic plants.

Method used

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  • Plant polygene expression carrier, transforming factor containing said carrier and its application
  • Plant polygene expression carrier, transforming factor containing said carrier and its application
  • Plant polygene expression carrier, transforming factor containing said carrier and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The construction of embodiment 1 plant polyvalent expression vector

[0023] According to the double enzyme digestion reaction and electrophoresis system shown in Table 1.1, the plasmid pBtS1m (plasmid containing the BtS1m gene, Chinese patent application CN1393561A) and pCR2.1 plasmid containing the 2E-35S+Ω fragment were cut with HindIII+BamHI, and agarose gel After gel electrophoresis, use E.Z.N.A  Gel Extraction kit (Omega, the same below) recovered the two bands at about 0.8kb and 3.9kb respectively to obtain the 2E-35S+Ω fragment and the pCR2.1 plasmid with a gap, and then used T4DNA ligase to convert the recovered 0.8kb Ligated with the two-part DNA fragment of 3.9kb (see Table 1.2 for the ligation reaction system), the pCR2.1.2Ep plasmid containing the 2E-35S+Ω fragment was obtained (see figure 1 ); cut the pCR2.1 aroAM12 and pCR2.1.2Ep plasmids containing the aroAM12 gene fragment with BamHI+XbaI respectively, obtain the pCR2.1.2Ep plasmid containing the aroA...

Embodiment 2

[0038] The acquisition of embodiment 2 escherichia coli transformants

[0039] Preparation of E.coli XL-1-blue competent cells: ①Put a single colony of XL1-blue into 5mL LB liquid medium (see Table 2.1) without antibiotics, shake overnight at 37°C; ②Press 1% The amount of (v / v) was transferred to fresh LB liquid medium and shaken to OD at 37°C 600 =0.3; ③Add 50-100mL LB liquid culture medium (see Table 2.1 for LB preparation) into two sterile centrifuge tubes, place on ice for 30 minutes; ④Centrifuge at 4°C, 4000rpm (rev / min) for 10 minutes , remove the supernatant, and add 10 mL of pre-cooled 0.1% CaCl to each centrifuge tube 2 Resuspend the cells in the solution, and put them in an ice bath for 30 minutes. ⑤ Centrifuge at 4°C and 4000rpm for 10 minutes, remove the supernatant, and suspend the cells in 2 mL of pre-cooled 0.1% CaCl 2 Add 300 μL of sterile glycerol to the solution, mix well, add 100 μL of XL1-blue competent cells to each sterile centrifuge tube, and store at ...

Embodiment 3

[0048] The transformation of embodiment 3 Agrobacterium tumefaciens

[0049] Preparation of Agrobacterium tumefaciens LBA4404 competent cells: ① Pick LBA4404 colonies from the YEB solid medium (see Table 3.1) plate containing streptomycin (str) and rifampicin (Rif), inoculate into 5ml containing the corresponding antibiotic In the YEB liquid medium (according to Table 3.1, without adding agar), shake overnight at 200 rpm at 28°C. ② Dilute to 50ml with YEB liquid medium, then culture at 28°C and 200rpm for 6-12 hours until OD 600 The value is around 0.6. ③ Place on ice for 5 minutes, then centrifuge at 4°C, 2000rpm for 7 minutes. ④Take 1ml of ice-cold CaCl with a concentration of 20mmol / L 2 Resuspend the precipitate in the solution and mix well. ⑤ Divide into 10 portions, 100 μl each, and store in a -70°C refrigerator for later use.

[0050] Add 5 μl of the plasmid extracted in Example 2 to 100 μl of Bacillus LBA4404 competent cells stored in a -70°C refrigerator, bathe in...

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Abstract

An efficient plant polygenic expression carrier pBtslm / aroM12 prepared from basic carrier pCAMBIA contains the antibiotic resistance gene NPTII, the glyphosate resistant gene aroAM12 and pest-resistant gene BtSlm. Said expression carrier can be used to transform colibacillus to obtain its colibacillus transformant, or to transform Agrobacterium to obtain its Agrobacterium transformant. Said transformat can be used to transform plant, obtaining the plant resisting glyphosate and pests.

Description

technical field [0001] The invention belongs to the technical field of plant genetic engineering, and specifically relates to a high-efficiency plant multi-gene expression vector, a transformant containing the vector and application thereof. Background technique [0002] Glyphosate is a systemic broad-spectrum herbicide, which can non-selectively inhibit the activity of shikimate hydroxyethylene transferase (EPSPS) in all plants, block the synthesis of aromatic amino acids, and thus block the growth of plants. EPSPS catalyzes the synthesis of shikimate-3-phosphate (S3P) and phosphoenolpyruvate (PEP) in the aromatic amino acid synthesis pathway to form 5-enolpyruvylshikimate-3-phosphate (EPSP). There have been more than 15 years of research on the application of genetic engineering to cultivate herbicide-tolerant crops abroad, and a variety of herbicide-resistant transgenic crops have been developed. In the past, the main strategy of glyphosate-resistant genetic engineering w...

Claims

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Application Information

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IPC IPC(8): A01H1/00A01H5/00A01N57/18C07H21/00C12N5/10C12N15/70C12N15/74C12N15/82
Inventor 谢龙旭徐培林田颖川刘正德
Owner SUN YAT SEN UNIV
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