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Gene AtPIP2;7 capable of improving plant disease resistance and application thereof

A disease resistance, plant technology, applied in the field of plant molecular biology and plant genetic engineering, can solve problems such as unpredictability of functions, and achieve the effect of improving disease resistance and promoting plant growth

Active Publication Date: 2019-12-13
SHANDONG AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complexity of the types and structures of plant aquaporins, their functions are diverse and unpredictable, and whether the PIP2 subfamily is related to plant disease resistance has not been reported yet.

Method used

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  • Gene AtPIP2;7 capable of improving plant disease resistance and application thereof
  • Gene AtPIP2;7 capable of improving plant disease resistance and application thereof
  • Gene AtPIP2;7 capable of improving plant disease resistance and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Embodiment 1: AtPIP2; Construction of 7 overexpression vector

[0068] Extract Arabidopsis thaliana Col-0 ecotype RNA, and reverse transcribe it into cDNA. Use PrimerSTAR Max DNA polymerase (Takara), use the cDNA obtained above as a template, and use the sequences in Table 1 as primers to amplify Kpn I and Xba I two restriction sites of AtPIP2; 7 gene. The amplification program was as follows: 98°C, 5 minutes; 98°C, 30 seconds, 60°C, 30 seconds, 72°C, 30 seconds, 30 cycles; 72°C, 10 minutes. The amplified 6 tubes of DNA products (respectively numbered 1-6) were detected by gel electrophoresis ( figure 1 B).

[0069] The amplified product was purified and digested with two restriction endonucleases Kpn I and Xba I, and then purified again to obtain a gene fragment with cohesive ends at both ends. At the same time, the vector pCAMBIA1300 used for plant overexpression was prepared, and after being digested with two restriction enzymes Kpn I and Xba I, the linearized vec...

Embodiment 2

[0072] Embodiment 2: pCAMBIA1300::AtPIP2; Transgenic operation and overexpression strain screening of 7

[0073] With pCAMBIA1300::AtPIP2; 7 plasmids (prepared in Example 1) are transformed into Agrobacterium EHA105 competent, and positive clones are taken in 20 mL of YEB liquid medium containing 50 μg / ml rifampicin and 50 μg / ml kanamycin, 28 Cultivate overnight at 220 rpm. Take 5 mL of the culture, transfer it to 100 mL of new liquid YEB medium containing 50 μg / ml rifampicin and 50 μg / ml kanamycin, and incubate at 28°C and 220 rpm for 12 hours. Collect the cells by centrifugation at 10000xg for 5 minutes at 4°C. Use 1 / 2 MS to wash the cells, and collect the cells by centrifugation at 10000xg for 5 minutes at 4°C. Use 1 / 2MS to resuspend the bacteria and adjust the OD of the bacteria suspension 600 to 0.8, add 3 / 10,000 surfactant Silwet L-77, and place the obtained bacterial suspension on ice for use.

[0074] After Arabidopsis bolting, Agrobacterium-mediated transgenesis was...

Embodiment 3

[0076] Example 3: Analysis of the expression level of the overexpression strain AtPIP2; 7

[0077] The wild type and AtPIP2;7 overexpressed Arabidopsis thaliana grown under short-day conditions for 4 weeks were selected, the aerial part was quickly cut and placed in liquid nitrogen, and the Arabidopsis tissue was ground into powder in liquid nitrogen, and the powder was placed in the into a 2.0 ml eppendorf tube containing 1 ml Trizol (purchased from Invitrogen). After the plant tissue was completely crushed, the plant tissue RNA was extracted by phenol-chloroform extraction. After reverse transcription into cDNA, it was stored in a -20°C refrigerator until use.

[0078] Using the above cDNA as a template, the primers in Table 2 and ChamQ Universal SYBR qPCR MasterMix (purchased by Novizyme) were used to carry out a fluorescent quantitative PCR test. The fluorescent quantitative PCR program is as follows: 95°C, 30 seconds; 95°C, 3 seconds; 60°C, 10 seconds; a total of 40 cyc...

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Abstract

The invention discloses a gene AtPIP2;7 capable of improving plant disease resistance and application thereof. The invention clones an arabidopsis thaliana water channel protein AtPIP2;7 gene from cruciferous plant arabidopsis thaliana, and based on the gene, constructs an AtPIP2;7 overexpression vector which can be used in the arabidopsis thaliana, tobacco, rice and other plants. After the gene AtPIP2;7, or protein, a recombinant expression vector or a transformant encoded thereby is introduced into the arabidopsis thaliana, a variety having significant disease resistance and / or capable of promoting plant growth can be obtained. The gene AtPIP2;7 can be applied to improvement of disease resistance in crop breeding, and is expected to improve the disease resistance of plants, thereby achieving the purposes of increasing yield and reducing pesticide.

Description

technical field [0001] The invention relates to the technical fields of plant molecular biology and plant genetic engineering, in particular to a gene AtPIP2;7 for improving plant disease resistance and its application. Background technique [0002] During the growth and development of plants, they are often attacked by various pathogens, such as fungi, bacteria, viruses and nematodes. Plant yields decrease. Therefore, improving plant disease resistance is of great significance to effectively control the occurrence of crop diseases. [0003] Plant aquaporins (aquaporin, AQP) are widely distributed. Different types of aquaporins have been identified in Arabidopsis, rice and other plants. The molecular weight of this type of protein is between 26-32KDa, and it belongs to the transmembrane channel protein MIP. (major intrinsic protein) superfamily, which can efficiently mediate the passive transmembrane transport of free water in both directions (Maurel et al., 2008). [000...

Claims

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Application Information

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IPC IPC(8): C12N15/29C12N15/82A01H5/00A01H6/20A01H6/82A01H6/46
CPCC07K14/415C12N15/8261C12N15/8281
Inventor 董汉松陈蕾徐德坤徐玉恒王浩张丽媛王延玲
Owner SHANDONG AGRICULTURAL UNIVERSITY
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