Plant TMK1 gene and application thereof in sclerotinia sclerotiorum resistance
A sclerotinia and gene technology, applied in the field of plant disease resistance of the plant receptor transmembrane protein TMK1 gene and its encoded protein, can solve the problems affecting the national economy and people's livelihood such as food security, crop disasters, and agricultural production losses
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Embodiment 1
[0036] Example 1 After inoculating mycelia of S. sclerotiorum oxalic acid deletion mutant (S. sclerotiorum A2), tmk1 Tolerance phenotype analysis of mutant (SALK_016360).
[0037] Detached Arabidopsis leaves grown for about 4 weeks were inoculated with S. sclerotiorum A2 hyphae. 36 hours after inoculation, the phenotype observation of leaf disease and the statistical analysis of leaf plaque area were carried out. Taking leaf diseased spots as the object of investigation, tmk1 The overall disease state of the mutant is weaker than that of the wild type, and this phenotype can be complemented by TMK1, which is consistent with the results of trypan blue staining ( figure 1 ).
[0038] tmk1 The area of dead cells in the mutant infected by S. sclerotiorum was significantly smaller than that of the wild type. The statistical results of leaf damage area also show that, tmk1 Mutants had enhanced resistance to the fungus S. sclerotiorum A2 ( figure 2 ).
Embodiment 2
[0039] Example 2 Construction of pTMK1:TMK1 vector
[0040] For further verification tmk1 The phenotype of the mutant's resistance to Sclerotinia thaliana, we cloned the TMK1 gene (shown in SEQ ID NO.1) from the wild-type Arabidopsis genome, including its upstream 3000bp promoter sequence (see image 3 ); and the amplified gene sequence was connected to the expression vector pCAMBIA1300 containing the FLAG tag, and sequenced for final detection and verification, and finally the pTMK1:TMK1-FLAG vector was constructed.
[0041] The primer sequences used are:
[0042] Upstream primer F: 5-CTTATTTTTTGCTTTTTGATTGTTT-3 (SEQ ID NO.3),
[0043] Downstream primer R: 5-TCGTCCATCTACTGAAGTGAATG-3 (SEQ ID NO.4).
Embodiment 3
[0044] Example 3 Construction and detection of transgenic plants
[0045] Contain in embodiment 2 gTMK1-FLAG The pCAMBIA1300 vector of the gene was transformed into Agrobacterium GV3101, and then transformed by Arabidopsis flower dipping method tmk1 Homozygous mutants, obtained by resistance selection tmk1 Complementary lines of mutants. The specific method is: inoculate the Agrobacterium containing the target vector in 80 mL of LB liquid medium (containing 50 ug / mL Kan, 50 ug / mL Rif), shake and cultivate overnight at 28 ° C, and wait until the OD 600 When it is about 1.6, centrifuge at 5000rpm for 10min; remove the supernatant, add 30mL 5wt.% sucrose to suspend the cells, and add 10uL Silwet to mix well to obtain the transformation liquid. Soak the Arabidopsis flower buds in the transformation solution for 1 min, take them out and put them in a black fresh-keeping bag and place them in a dark place for 12 hours; remove the fresh-keeping bags the next day, and put the pl...
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