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Lilium regale Wilson WRKY transcription factor gene LrWRKY11 and application thereof

A technology of transcription factors and genes, applied in application, genetic engineering, plant genetic improvement, etc., can solve the problems affecting the yield and quality of lily cut flowers, scale rot and falling off, bulb quality decline, etc., and achieve broad market application prospects and breeding cycle Effect of shortening, reducing usage

Active Publication Date: 2020-02-04
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fusarium infection of lily bulbs causes basal necrosis and scale rot and falls off, resulting in a decline in bulb quality; leaves turn yellow, wilt and droop after plants are infected with Fusarium, and plants wither and die early, seriously affecting the yield and quality of lily cut flowers

Method used

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  • Lilium regale Wilson WRKY transcription factor gene LrWRKY11 and application thereof
  • Lilium regale Wilson WRKY transcription factor gene LrWRKY11 and application thereof
  • Lilium regale Wilson WRKY transcription factor gene LrWRKY11 and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: LrWRKY11 Full-length gene cloning and sequence analysis

[0021] The roots of lily were inoculated with Fusarium oxysporum, total RNA was extracted from the root 24 h after inoculation, the treated root of lily was ground into powder with liquid nitrogen, then transferred into a centrifuge tube, and extracted by guanidine isothiocyanate method Total RNA: Use M-MLV reverse transcriptase (promega) to synthesize the first strand of cDNA using total RNA as a template. The reaction system and operation process are as follows: Take 5 μg Total RNA, add 50 ng oligo (dT), 2 μL dNTP Mix in sequence (2.5mM each), make up the reaction volume to 14.5 μL with DEPC water; after mixing, heat denaturation at 70°C for 5 min, then rapidly cool on ice for 5 min, then add 4 μL 5×First-stand buffer, 0.5 μL RNasin (200U), 1 μL M-MLV (200U), mix well and centrifuge briefly, incubate at 42°C for 1.5 h, take it out and heat at 70°C for 10 min to terminate the reaction; store at -20°C...

Embodiment 2

[0024] Embodiment 2: plant overexpression vector construction

[0025] Use the SanPrep column plasmid DNA mini-extraction kit (Shanghai Sangong) to extract the insert LrWRKY11 coli plasmid pGEM-T- LrWRKY11 As well as the plasmid of the plant expression vector pCAMBIA2300S, take 1 μL for agarose gel electrophoresis to detect the integrity and concentration of the extracted plasmid; Bam HI and Xba I respectively against the plasmid pGEM-T- LrWRKY11and pCAMBIA2300S for double enzyme digestion (100 μL system), the reaction system and operation process are as follows: take 20 μL pGEM-T- LrWRKY11 and pCAMBIA2300S plasmid, add 10 μL 10×K buffer, 5 μL Bam HI, 5 μL Xba I. 60 μL ddH 2 O, after mixing, centrifuge for a short time, and place at 37°C for overnight reaction. All digested products were subjected to agarose gel electrophoresis, and then the LrWRKY11 The fragments and the large fragments of the pCAMBIA2300S vector were gel-recovered separately, and 1 μL of the reco...

Embodiment 3

[0028] Example 3: Plant genetic transformation mediated by Agrobacterium and screening of transgenic plants

[0029] The transgenic recipient in this experiment was tobacco ( Nicotiana tabacum ), the tobacco seeds were soaked in 75% alcohol for 30s, washed with sterile water and washed with 0.1% HgCl 2 Soak for 8 minutes, then wash several times with sterile water, sow on 1 / 2 MS medium, culture in dark at 28°C for 5-8d, transfer to light incubator after germination (25°C, 16h / d light), and then Subculture once a month with 1 / 2 MS medium.

[0030] Take out the stored pCAMBIA2300S-containing pCAMBIA2300S- LrWRKY11 Agrobacterium LBA4404 strain of the plasmid was inoculated in 5 mL of LB liquid medium containing 50 mg / L Km and 20 mg / L rifampin in 20 μL, and cultured at 28°C until the medium was turbid. Pipette 1 mL of turbid bacterial solution onto LB solid medium containing 50 mg / L Km, and incubate at 28°C for 48 h; then scrape off an appropriate amount of Agrobacterium on LB...

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Abstract

The invention discloses a Lilium regale Wilson WRKY transcription factor gene LrWRKY11. The Lilium regale Wilson WRKY transcription factor gene LrWRKY11 has a nucleotide sequence shown as SEQ ID NO: 1, and encodes a protein having an amino acid sequences shown as SEQ ID NO: 2. According to the invention, genomic studies have confirmed that the LrWRKY11 gene can improve anti-fungal functions of plants. Being constructed onto a plant expression vector and transferred into tobacco so as to be subjected to overexpression, the anti-fungal LrWRKY11 gene disclosed by the invention is capable of endowing the transgenic tobacco with very strong resistance to fungal pathogens. Experimental results have shown that transgenic tobacco with overexpression of the LrWRKY11 gene has very high level of resistance to infection of Nigrospora oryzae, Fusarium verticillioides, Botryosphaeria dothidea, Fusarium solani and Alternaria panax.

Description

technical field [0001] The invention relates to the field of molecular biology and genetic engineering related technology research, in particular to a Minjiang lily WRKY transcription factor gene LrWRKY11 and applications. Background technique [0002] Under the influence of biotic or abiotic stress factors, plants will undergo a series of morphological, physiological and biochemical pathological changes, which will hinder their normal growth and endanger their economic value. Biological stress factors include fungi, bacteria, etc. The symptoms of plant diseases are mainly discoloration, necrosis, rot, wilting, and deformity, among which necrosis, rot, and wilting are the main types. Plant diseases caused by fungi account for about 70-80%, and the symptoms often manifest as various molds, spots, grains, powders, etc., which seriously affect the growth and production of plants. Since fungal diseases are easy to spread through airflow and water flow, chemical agents are gene...

Claims

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Application Information

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IPC IPC(8): C12N15/29C12N15/82C12N15/65C12N15/66C07K14/415A01H5/00A01H6/82
CPCC07K14/415C12N15/8282C12N15/65C12N15/66
Inventor 刘迪秋赵秦李珊王自娥陈虹均赵锂蕾葛锋
Owner KUNMING UNIV OF SCI & TECH
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