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A tobacco nicotine content regulation gene IAA27 and a cloning method and application thereof

A technique of regulating genes and cloning methods, which is applied in the field of genetic engineering, can solve problems affecting nicotine content, etc., and achieve the effect of huge economic benefit potential and broad application prospects

Inactive Publication Date: 2019-01-15
YUNNAN ACAD OF TOBACCO AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Regulating nicotine synthesis genes through chloride channels to affect nicotine content has not been reported

Method used

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  • A tobacco nicotine content regulation gene IAA27 and a cloning method and application thereof
  • A tobacco nicotine content regulation gene IAA27 and a cloning method and application thereof
  • A tobacco nicotine content regulation gene IAA27 and a cloning method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] clone IAA27 Gene

[0050] Tobacco leaf cDNA was used as a template, and primers were designed according to the tobacco genome database information, and the IAA27 PCR amplification of the gene to obtain the PCR amplification product. Design primers as follows:

[0051] Forward primer: 5'-ATGTCTATACCATTAGAACATG -3';

[0052] Reverse primer: 5'-TCAGTTGTACATACACTCAAC-3'.

[0053] The PCR reaction system and amplification conditions are shown in Table 1.

[0054] Table 1 PCR reaction system and conditions

[0055]

[0056] The amplified PCR product was electrophoresed on a 0.8% agarose gel, and the gel electrophoresis results were as follows: figure 1 shown. After electrophoresis, the PCR product purification kit from Qiagen was used to recover and purify the PCR product according to the product instructions, and sent to Invitrogen for sequencing to verify the sequence results.

Embodiment 2

[0058] Construction of Plant RNAi Vectors

[0059] In Example 1 IAA27 The full-length fragment is used as a template, and the primers containing the gateway adapter sequence are used for PCR amplification. After the PCR product is purified, the amplified product is inserted into the pdonr-zeo vector of Invitrogen Company through BP reaction ( figure 2 )middle. The constructed BP reaction carrier will be converted to IAA27 Fragment replacement into pHellsgate12 RNAi interference vector ( image 3 )middle.

[0060] (1) The gateway reaction primer sequence is as follows:

[0061] IAA27 _F: 5'-GGGGACAAGTTTGTACAAAAAAGCAGGCTGCATGTCTATACCATTAGAACATGATTATATAG-3';

[0062] IAA27 _R: 5'-GGGGACCACTTTGTACAAGAAAGCTGGGTCGCAATTAATGGACAAATCCCATTTTCCAG-3'.

[0063] (2) PCR reactions were performed using Phusion high-fidelity polymerase for PCR cloning.

[0064] The PCR reaction system and conditions were the same as in Example 1.

[0065] (3) BP response:

[0066] (a) Prepare 8...

Embodiment 3

[0081] Agrobacterium-mediated transformation of tobacco and identification of transgenic plants

[0082] (1) Transformation of Agrobacterium by freeze-thaw method

[0083] Add 1 μg (200 ng / μL) pHellsgate12 recombinant vector to 100 μL competent Agrobacterium LBA4404, mix well, let stand on ice for 5 min, freeze in liquid nitrogen for 5 min, and then take it out from the liquid nitrogen. Place in a water bath at 37°C for 5 min, then let stand on ice for 5 min, then add 500 μL LB solution, resume cultivation at 28°C for 4 h under sufficient shaking conditions, and finally spread the bacterial solution evenly on the selective plate culture medium at 28°C for 48 h.

[0084] (2) Tobacco variety K326 was transformed by leaf disk method.

[0085] The specific method is as follows:

[0086] (a) Under aseptic conditions, put the tobacco K326 seeds into the EP tube and wash them with sterile water for 2-3 times;

[0087] (b) Soak in 75% alcohol for 30-60 s;

[0088] (c) Treat with ...

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Abstract

The invention discloses a tobacco nicotine content regulation gene IAA27 and a cloning method and application thereof. The nucleotide sequence of the tobacco nicotine content regulation gene IAA27 isshown in SEQ ID NO: 1; The amino acid sequence of the encoding protein is shown in SEQ ID NO: 2. The cloning method comprises synthesizing tobacco leaf cDNA, extracting total RNA from tobacco leaf, and reversing transcribing to obtain first strand cDNA; performing PCR amplification of IAA27 gene; designing primers according to the IAA27 gene sequence, with the tobacco leaf cDNA being adopted as atemplate; performing PCR amplification; recovering and purifying a PCR amplification product; and sequencing the product. The tobacco nicotine content regulating gene IAA27 is used for obtaining transgenic tobacco plants with high nicotine content. Inhibition of the expression of IAA27 gene in tobacco plants can obviously improve the nicotine content in tobacco leaves, and has wide application prospect in actual production.

Description

technical field [0001] The invention belongs to the technical field of genetic engineering, and in particular relates to a tobacco nicotine content regulation gene IAA27 and its cloning method and application. Background technique [0002] It is very meaningful to study the metabolic regulation of tobacco nicotine. Through gene regulation, tobacco varieties with different nicotine content can be provided, which can provide raw materials for the commercial production of personalized nicotine tobacco products. Nicotine has a strong physiological stimulating effect on the human body and is the material basis for the commercial use of tobacco. Many of the world's top tobacco companies such as Philip Morris, Imperial Tobacco, Japan Tobacco, British American Tobacco and other companies have invested heavily in research on the metabolic pathways and regulatory mechanisms of tobacco nicotine. [0003] Nicotine is a pyridine alkaloid, mainly found in Solanaceae Nicotiana ( Nicotian...

Claims

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Application Information

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IPC IPC(8): C12N15/29C07K14/415C12N15/10C12N15/82A01H5/00A01H6/82
CPCC07K14/415C12N15/1096C12N15/8218C12N15/8243
Inventor 白戈逄涛谢贺李勇杨大海姚恒张谊寒肖炳光李永平
Owner YUNNAN ACAD OF TOBACCO AGRI SCI
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