Eremochloa ophiuroides rooting promoting gene EoSINAT5 as well as plant expression vector and application thereof
A plant expression vector and a technology for promoting rooting, which are applied in the field of EoSINAT5, a rooting-promoting gene, and plant expression vectors thereof, and can solve the problems of weak rooting ability of A.
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Embodiment 1
[0081] Cloning of embodiment 1.EoSINAT5 gene
[0082] Take the genus 'Ganbei' as the material, take 0.15 g of the root, extract the total RNA of the leaves according to the operation method of the Trizol RNA extraction kit (TaKaRa), and reverse according to the M-MLV reverse transcription kit (TaKaRa) According to the sequence information of the gene in the chrysanthemum library, use primer 5 software to design specific primers to amplify EoSINAT5;
[0083] Upstream primer EoSINAT5-F: 5′-ATGGCATCAGTTACTTATAT-3′ (SEQ ID NO.2),
[0084] Downstream primer EoSINAT5-R: 5'-CCGCTCCTTCCAGATCCTCC-3' (SEQ ID NO.3);
[0085] Use the root cDNA as a template to carry out PCR reaction, 50 μL reaction system: 5.0 μL 10×PCR Buffer, 1.0 μL each of EoSINAT5-F and EoSINAT5-R primers (20 μmol L -1 ), dNTP mix 4.0μL (2.5mmol·L -1 ), TaqDNA Polymerase 0.2μL, cDNA template 1μL, ddH 2 O 37.8 μL; reaction program: pre-denaturation at 95°C for 5 min, then melting at 94°C for 45 sec, annealing at 55...
Embodiment 2
[0086] Embodiment 2. Construction of plant expression vector pCAMBIA1305.1-EoSINAT5
[0087] Design primers according to the full-length gene sequence of EoSINAT5 to carry out PCR reaction, use the positive plasmid in the above-mentioned embodiment 1 as a template, introduce homologous recombination arms respectively at the upstream and downstream of the EoSINAT5 gene,
[0088] Upstream primer 1305-EoSINAT5-F:
[0089] 5'-ggtacccggggatcctctagaATGGCATCAGTTACTTATATTGATGATAGC-3' (SEQ ID NO.4), downstream primer 1305-EoSINAT5-R: 5'-tgcctgcaggtcgactctagaCCGCTCCTTCCAGATCCTCC-3' (SEQ ID NO.5);
[0090] With high-fidelity enzyme (PrimeSTAR TM HS DNA Polymerase, TaKaRa) for PCR reaction, 50 μL reaction system: 10×HS PCR Buffer 5.0 μL, 1305-EoSINAT5-F, 1305-EoSINAT5-R primers 1.0 μL each (20 μmol L -1 ), dNTP mix 4.0μL (2.5mmol·L -1 ), PrimeSTAR TM HS DNA Polymerase 0.4 μL, cDNA template 1 μL, ddH 2 O 37.6 μL; reaction program: pre-denaturation at 95°C for 5 min, then melting at ...
Embodiment 3
[0092] Example 3. Transformation of Arabidopsis thaliana by Agrobacterium EHA105-mediated pollen tube infection
[0093] Pick a single colony of EHA105 from a YEB (50 μg / mL rifampicin) plate, inoculate it in 50 mL of YEB liquid medium containing 50 μg / mL rifampicin, cultivate it at 200 rpm, 28°C until the OD value is 0.5, and then bathe the bacteria in ice 30min, centrifuge to collect the bacteria, suspend in 2mL pre-cooled 100mM CaCl 2 (20% glycerol) solution, 200 μL / tube aliquoted for use. Take 10 μL of the pCAMBIA1305.1-EoSINAT5 vector plasmid, add 200 μL of competent cells, bathe in ice for 30 minutes, freeze in liquid nitrogen for 5 minutes, and add 800 μL of YEB liquid medium for 5 minutes at 37°C, pre-culture for 4 hours at 28°C and 200 rpm, and spread the bacterial solution on YEB (50 μg / mL rifampicin + 50 μg / mL kanamycin) solid medium, cultured in the dark at 28°C for 2 days, picked a single clone for detection, and selected positive clones to transform Arabidopsis ...
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