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Legume root tissue-specific promoter and its application

A technology of leguminous plants and promoters, which is applied in the field of specific promoters and its applications, and can solve the problems of lack of efficient transformation vectors, etc.

Active Publication Date: 2017-12-08
CAS CENT FOR EXCELLENCE IN MOLECULAR PLANT SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the construction of transgenic plasmids is one of the bottlenecks of this technology. The main reason is the lack of effective transgenic vectors that can be directed to constitutive expression in legumes or perform tissue-specific expression; and the lack of efficient transformation vectors

Method used

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  • Legume root tissue-specific promoter and its application
  • Legume root tissue-specific promoter and its application
  • Legume root tissue-specific promoter and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] Example 1. Cloning of root-specific promoters in soybean

[0085] The soybean Williams82 genomic DNA extracted by conventional methods is used as a template, and the following primer pairs (SEQ ID NO.: 2-3; with SEQ ID NO: 4-5) and KOD high-fidelity enzyme are used to amplify the promoter by conventional PCR method, And purify; Wherein, primer pair SEQ ID NO:4-5 clones the promoter P1 (SEQ ID NO:1) of the present invention, and primer pair SEQ ID NO:2-3 does not clone the specific promoter sequence .

[0086] Forward primer: GGGGTACCGGTCACCCAGATATCATTTGCTGAAA (SEQ ID NO: 2);

[0087] Reverse primer: TCCCCCGGGGCCACAGCCATAGCCATGCTTTC (SEQ ID NO: 3);

[0088] Forward primer: GGGGTACCGTGTTGAGCCACAACCATAGCCA (SEQ ID NO: 4);

[0089] Reverse primer: GGAATTCGTAAAGTGTTATTATGTCGCAAGTAATATTGCTA (SEQ ID NO: 5);

[0090] The PCR amplification conditions are:

[0091] 94℃, 2min;

[0092] 98℃,10sec;

[0093] 60℃,30sec;

[0094] 68℃, 1min;

[0095] 68℃, 7min;

[0096] 35 cyc...

Embodiment 2

[0098] Example 2. Construction of GUS expression vector

[0099] The promoter sequence that embodiment 1 obtains and commercially available vector p1301.POG (Liu Wei etc., the effect of the small G protein RO of Medicago truncatula in symbiotic process: 2.MtROP5 regulates the functional analysis of root hair growth and development, Chinese Agricultural Sciences, 2010 ,43(8)), transformed into Escherichia coli DH5α strain (Shanghai Jiemei Gene Pharmaceutical Technology Co., Ltd., Shanghai) for preservation. After being verified by sequencing, Agrobacterium tumefaciens EHA105 (Beijing Baierdi Biotechnology Company, Beijing) was transformed. The specific steps are as follows:

[0100]1. Enzyme digestion of PCR product and p1301.POG vector

[0101] The PCR product and the p1301.POG vector were double-digested with endonuclease Hind III / Sal1, wherein the digestion reaction conditions of the PCR product were as follows:

[0102] PCR product: 1ug

[0103] 10*fast digest buffer: 5...

Embodiment 3

[0132] Embodiment 3. Obtaining of transgenic plants

[0133] The Agrobacterium tumefaciens obtained in Example 2 were used for whole plant transformation of leguminous plants. The leguminous japonicus japonicus was selected to verify the function of the tissue-specific expression vector. Agrobacterium tumefaciens EHA105 containing a tissue-specific expression promoter vector is transfected into plant calli and cultured in a greenhouse to obtain transgenic plants. figure 2 and image 3 The photographs of the transgenic callus and the normal growing japonicus were shown respectively.

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Abstract

The invention relates to a specific promoter in root tissue of leguminous plants and its application. The promoter is particularly suitable for driving the specific expression of the exogenous gene in the root tissue of the legume plant, while the expression level in other tissues of the legume plant is extremely low or not expressed. The expression specificity and specificity of the promoter are very high. The present invention also provides constructs, expression cassettes, vectors and the like having the promoter. The transgenic legume plant containing the promoter of the present invention can specifically improve the agronomic traits of the legume plant, effectively avoid the impact of foreign gene introduction on other tissues of the legume plant, and can also specifically express the foreign gene in the root tissue, Thereby obtaining various related products.

Description

technical field [0001] The invention belongs to the field of biotechnology. Specifically, the present invention relates to a specific promoter in leguminous plant tissue and its application. Background technique [0002] Legumes are of great economic importance. Among them, soybean is the main source of vegetable protein and edible oil, and it is also the oil crop with the largest output in the world. Soybean is the most nutritious and easily digestible food among legumes, and it is the richest and cheapest source of protein. In many parts of the world today is the staple food of people and animals. For my country, leguminous plants, especially soybeans, are an important economic crop and food crop. [0003] Conventional breeding methods play an important role in quality improvement and breeding of new varieties, but there are also disadvantages such as long breeding period, difficulty in breaking trait linkage, low probability of polygenic recombination, and difficulty ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12N15/113C12N15/82C12N5/10A01H5/00
Inventor 李轩余曜戴小密罗利
Owner CAS CENT FOR EXCELLENCE IN MOLECULAR PLANT SCI
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