Abstract
An efficient procedure is described for transformation of calli of the monocotyledonous plant Alstroemeria by Agrobacterium rhizogenes. Calli were co-cultivated with A. rhizogenes strain A13 that harbored both a wild-type Ri-plasmid and the binary vector plasmid pIG121Hm, which included a gene for neomycin phosphotransferase II (NPTII) under the control of the nopaline synthase (NOS) promoter, a gene for hygromycin phosphotransferase (HPT) under the control of the cauliflower mosaic virus (CaMV) 35S promoter, and a gene for β-glucuronidase (GUS) with an intron fused to the CaMV 35S promoter. Inoculated calli were plated on medium that contained cefotaxime to eliminate bacteria. Four weeks later, transformed cells were selected on medium that contained 20 mg L–1 hygromycin. A histochemical assay for GUS activity revealed that selection by hygromycin was complete after eight weeks. The integration of the T-DNA of the Ri-plasmid and pIG121Hm into the plant genome was confirmed by PCR. Plants derived from transformed calli were produced on half-strength MS medium supplemented with 0.1 mg L–1 GA3 after about 5 months of culture. The presence of the gusA, nptII, and rol genes in the genomic DNA of regenerated plants was detected by PCR and Southern hybridization, and the expression of these transgenes was verified by RT-PCR.
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Akutsu, M., Ishizaki, T. & Sato, H. Transformation of the monocot Alstroemeria by Agrobacterium rhizogenes . Molecular Breeding 13, 69–78 (2004). https://doi.org/10.1023/B:MOLB.0000012860.29731.9c
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DOI: https://doi.org/10.1023/B:MOLB.0000012860.29731.9c