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Cloning and application of promoter sequence of corn malate dehydrogenase gene

A technology of malate dehydrogenase and promoter sequence, which is applied in the field of plant bioengineering breeding, and can solve problems such as the cloning and application of gene promoters that have not yet been seen

Inactive Publication Date: 2011-02-23
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Although malate dehydrogenase has important physiological and biochemical functions, so far, there has been no report on the cloning and application of the gene promoter in cereal crops

Method used

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  • Cloning and application of promoter sequence of corn malate dehydrogenase gene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1: Transformation of PZmMDH::TPT1 sense gene to create wheat high-efficiency materials

[0037] The phosphorus transport between plant cytoplasm and chloroplast stroma is mainly responsible for the triose-phosphate / phosphate translocator (TPT), which can transport phosphorus from the cytoplasm to the chloroplast; at the same time, etc. Moles of triosephosphate 3-PGA are transported from the chloroplast stroma into the cytoplasm. However, when the cytoplasmic phosphorus concentration is reduced, the activity of the TPT transporter is inhibited, resulting in the accumulation of metabolites in the chloroplast. The TPT gene used in this example is the maize ZmTPT1 gene.

[0038] 1. Construction of fusion gene and plant expression vector

[0039] Specific primers were used to carry out PCR reaction with maize genomic DNA as a template, and the coding frames and 3' end sequences of PZmMDH and ZmTPT1 were obtained respectively. Electrophoresis analysis of amplificat...

Embodiment 2

[0057] Example 2: Transformation of PZmMDH::Bt toxin gene to create corn insect-resistant inbred lines and its application

[0058] 1. Construction of PZmMDH::Bt toxin fusion gene and plant expression vector

[0059]Fusion gene construction adopts conventional DNA recombination technology. According to the cloned PZmMDH and Bt toxin gene sequence, the PCR method is used to introduce a suitable enzyme cutting site, and the fusion gene is generated by restriction endonuclease digestion and sticky end connection. After the fusion gene was verified to be correctly constructed by sequencing, it was recombined into a plant expression vector and used to transform Agrobacterium to obtain an engineering strain whose Ti plasmid T-DNA region contained a transgenic plant selection marker and a target gene. The latter can be used for genetic transformation of plants.

[0060] 2. Establishment of receptor system

[0061] The main inbred lines used in my country's agricultural production ...

Embodiment 3

[0076] Example 3: Transforming the PZmMDH::CA1 gene to create a high-efficiency maize inbred line and its application

[0077] A large number of studies have concluded that in C3 plants, the C3 cycle is completed in single cells, and CO in the atmosphere 2 Carboxylation catalyzed by Rubisco directly enters the Calvin cycle, while the C4 cycle is completed cooperatively in mesophyll cells and bundle sheath cells. First, in mesophyll cells, CO 2 to HCO 3 - The form of phosphoenolpyruvate carboxylase (PEPCase) catalyzed immobilization to form C4 dicarboxylic acid-oxaloacetic acid (OAA), which was then reduced to malic acid (Mal), and then transferred to In bundle sheath cells, CO is rapidly re-released under the catalysis of decarboxylase 2 , participate in the Calvin cycle to form sugars; secondly, the pyruvate (Pyr) produced while releasing CO2 is transferred to the chloroplast of the mesophyll cell, and is catalyzed by pyruvate orthophosphate dikinase (PPDK) to generate in...

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Abstract

The invention discloses cloning and application of a promoter sequence of a corn malate dehydrogenase gene. In a method, the promoter sequence of the cytoplasmic corn malate dehydrogenase gene is cloned in a corn genome and fused with a target gene coding region or a ribose nucleic acid interfere (RNAi) structure to construct a plant expression structure; recombination genes are imported into plant cells by using transgene technology so as to obtain transgenic plants; the transgenic plants and later generations thereof with obviously improved stress resistance or economic characteristic are selected by detecting transgenic expression or goal characteristic to create a novel germplasm with application prospect in plant breeding.

Description

technical field [0001] The invention belongs to the field of plant bioengineering breeding, and specifically relates to the scheme and application of cloning a high-intensity expression gene promoter of maize and using it to construct a fusion gene, and then changing plant traits through a transgenic approach. Background technique [0002] The development of plant genetic engineering depends on the cloning and application of promoters with different characteristics. At present, the promoters commonly used in plant genetic engineering are generally constitutive promoters, such as the cauliflower mosaic virus (CaMV) 35S promoter and the nopaline synthase gene Nos promoter commonly used in dicotyledonous transgenic plants, which are often used in monocotyledonous transgenic plants The maize Ubi1 promoter and the rice actin gene Act1 promoter. Constitutive promoters have the characteristics of continuous and constant expression of driving genes in various tissues, and can produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N15/113A01H5/00C12N15/82
Inventor 张举仁李朝霞李坤朋张广峰
Owner SHANDONG UNIV
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