EAR1 protein related to plant drought resistance and coding gene thereof, and applications of EAR1 protein and coding gene
A drought-resistance and protein technology, applied in the field of genetic engineering, can solve the problem of not finding genes with PP2C protein phosphatase activity, and achieve the effects of small genome, simple genetic operation and short growth cycle
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[0030] Example 1 Construction, identification and phenotype analysis of CRISPR / Cas9 gene editing mutants
[0031] (1) Construction of CRISPR / Cas9 gene editing vector
[0032] To study the molecular mechanism of plant drought resistance, the present invention uses CRISPR / Cas9 technology to mutate the EAR1 gene from the Arabidopsis genome. First log on to the website http: / / www.genome.arizona.edu / crispr / CRISPRsearch.html to screen the target. In order to improve the efficiency of gene editing, dual-target editing is used. The sequence is as follows: the underlined area is the gene reading frame, and the italicized font is the target.
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[0055] Example 2 Obtaining and phenotypic analysis of ear1 mutant by EMS mutagenesis
[0056] (1) Acquisition and identification of ear1 mutants induced by EMS
[0057] The Colombian ecotype Arabidopsis seeds were subjected to EMS mutagenesis, the method is as follows: use ddH 2 O soak the seeds overnight and remove the unsaturated seeds. In 40mL of 100mM HPO 4 2- , H 2 PO 4 - Add 160μL of methyl methanesulfonate (EMS) to the potassium buffer solution, mix well, pour it into a tube with seeds, mutagenize for 8 hours, wash with sodium thiosulfate 5 times to inactivate EMS, and then use ddH 2 O Rinse the seeds 20 times. The mutagenized seeds were screened, and finally ear1 mutants with point mutations were obtained. The DNA was extracted and sequenced, and it was found that a C to T mutation occurred at the 163th nucleotide, which caused the premature termination of translation. ( figure 2 A).
[0058] Except for the 163th nucleotide, mutations in other sites of the EAR1 gene may a...
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