Protein for regulating and controlling chloroplast growth and gene and application thereof
A protein and chloroplast technology, applied in the field of genetic engineering
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[0035] Example 1: Cloning of WLP1 gene
[0036] a) Rice material
[0037] Rice (Oryza sativa L) mutant wlp1 (white leaf and panicle 1), the original wild-type material is the japonica rice variety Asominori.
[0038] b) Electron microscope observation
[0039] Using transmission electron microscope (TEM) to observe the chloroplast ultrastructure of the third leaf of wild-type and wlp1 at 23℃, it was found that the wild-type chloroplast contained normal lamellar structure, while wlp1 contained fewer capsules similar to the precursor structure. Bubbly chloroplasts. Observation of young ear chloroplasts at the heading stage showed that the mutants had less lamella accumulation than the wild type ( image 3 ).
[0040] c) Genetic analysis and positioning population
[0041] Use positive and negative hybridization to determine that wlp1 is a recessive mutant, select the mutant and NanJing 11 to cross, F1 generation selfed, single plant harvest and plant F2 population, select 1100 recessive i...
Example Embodiment
[0070] Example 2: Transgenic experiment
[0071] 1) Vector construction
[0072] Design a pair of primers that completely cover the ORF of the entire WLP1 gene, and design restriction sites BamHI and Sal1 on the primers respectively, PCR amplification of wild-type genomic DNA, electrophoresis detection and gel recovery, the recovered product is digested with BamHI and Sal1 , Connected to the pCAMBIA2300 vector that was cleaved with the same restriction enzymes. Sequencing confirmed that there was no base mutation. The constructed vector structure diagram is pCAMBIA-WLP1( Figure 4 ), and transfer the constructed vector into A grobacterium tumefaciens strain by electric shock.
[0073] The primer sequence for amplifying ORF sequence is:
[0074] SJg-BamHI: 5'-TTTGGATCCCAAGCCAGACGGACAAGAC-3' (SEQ ID NO. 10)
[0075] SJg-SalI: 5’-TTTGTCGACTGAGATTGTTGTGTCTTTCTTAGTC-3’ (SEQ ID NO.11)
[0076] 2) Genetic transformation:
[0077] (1) Selection of transforming receptor
[0078] The mature embryos...
Example Embodiment
[0082] Example 3: Chloroplast subcellular localization experiment of WLP1 (SEQ ID NO.2)
[0083] According to the full-length CDS sequence of WLP1 (SEQ ID NO.3), the restriction enzyme recognition site containing BamHI was designed, and the recombinant primer was designed. The sequence is:
[0084] SJGFP-F: CGGTCCCGGGGGATCCATGGCTACGGCCATCGC (SEQ ID NO.12)
[0085] SJGFP-R: TGCTCACCATGGATCCCTTCTCAGACTTCTGTATTCTTTTA (SEQ ID NO.13)
[0086] Using the wild-type cDNA as a template, the CDS sequence of WLP1 gene (SEQ ID NO.3) was amplified with PrimeSTAR high-fidelity enzyme. After the amplified product was sequenced to verify that the sequence was correct, it was connected to PAN580-GFP vector to obtain the fusion expression vector 35S ::WLP1:GFP. The fusion expression vector 35S::WLP1:GFP plasmid and 35S::GFP control plasmid without gene fusion were extracted and constructed, and introduced into rice protoplast cells by PEG-mediated method. The introduced rice protoplast cells were cult...
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