Cold induced promoter p-LTT1 for rice and application thereof
A technology of promoters and DNA molecules, applied in the field of rice cold-inducible promoter p-LTT1, can solve problems such as genetic bottlenecks, and achieve broad application and market prospects
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[0029] Example 1. Discovery of rice cold-induced promoter p-LTT1
[0030] 1. Discovery of cold-induced genes
[0031] First, the cold-tolerant rice line IL112 and the control parent Guichao No. 2 rice were used as materials for the chip (the chip is the rice whole genome chip from Affimetrix ( Rice Genome Array), item number: 900599) hybridization, and on the basis of chip data analysis, combined with comparative genomics analysis, screening cold tolerance related genes, after genome comparison, cold tolerance correlation analysis, and finally the cold tolerance gene LTT1. Under cold treatment conditions, the expression of this gene in rice cold-tolerant line IL112 increased significantly (see figure 1 ) Is a cold-induced gene.
[0032] 2. The discovery of cold-induced promoter p-LTT1
[0033] Use primer3 primer design software to design primers T1GUSF and T1GUSR, and introduce restriction endonuclease SalI and HindIII recognition sites and protective bases at both ends of the primer...
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[0040] Example 2. Functional verification of p-LTT1
[0041] 1. Construction of plant expression vector
[0042] 1. Using the genomic DNA of cold-tolerant line IL112 rice as a template, PCR amplification was performed with a primer pair composed of T1GUSF and T1GUSR to obtain PCR amplification products.
[0043] PCR reaction conditions: first 94℃5min; then 94℃30sec, 58℃45sec, 72℃2min, total 30 cycles; finally 72℃10min.
[0044] 2. Double digest the PCR amplified product obtained in step 1 with restriction enzymes SalI and HindIII, and recover the digested product.
[0045] 3. Double-cut the plant expression vector pCambia1381 with restriction enzymes SalI and HindIII, and recover the vector backbone (about 10650bp).
[0046] 4. Connect the digested product of step 2 and the vector backbone of step 3 to obtain the recombinant plasmid pCambia1381-pLTT1. According to the sequencing results, the structure of the recombinant plasmid pCambia1381-pLTT1 is described as follows: the DNA fragment...
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