Abstract
Genetically transformed plants of Cymbidium were regenerated after cocultivating protocorm-like bodies (PLB) with Agrobacterium tumefaciens strain EHA101 (pIG121Hm) that harbored genes for β-glucuronidase (gus), hygromycin phosphotransferase (hpt) and neomycin phosphotransferase II (nptII). PLB of three genotypes maintained in liquid new Dogashima medium (NDM), were subjected to transformation experiments. The PLB inoculated with Agrobacterium produced secondary PLB, 4 weeks after transfer onto 2.5 g L−1 gellan gum-solidified NDM containing 10 g L−1 sucrose, 20 mg L−1 hygromycin and 40 mg L−1 meropenem. Transformation efficiency was affected by genotype and the presence of acetosyringone during cocultivation. The highest transformation efficiency was obtained when PLB from the genotype L4 were infected and cocultivated with Agrobacterium on medium containing 100 μM acetosyringone. Transformation of the hygromycin-resistant plantlets regenerated from different sites of inoculated PLB was confirmed by histochemical GUS assay, PCR analysis and Southern blot hybridization.
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Abbreviations
- AS:
-
Acetosyringone
- GUS:
-
β-Glucuronidase
- Hm:
-
Hygromycin
- Km:
-
Kanamycin
- ND:
-
New Dogashima
- PLB:
-
Protocorm-like body
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Acknowledgements
We Thank Hitaka Orchid Co., Ltd. for providing Cymbidium seeds and Mukoyama Orchids Co., Ltd. for providing PLB of RY.
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Communicated by K. K. Kamo
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Chin, D.P., Mishiba, Ki. & Mii, M. Agrobacterium-mediated transformation of protocorm-like bodies in Cymbidium . Plant Cell Rep 26, 735–743 (2007). https://doi.org/10.1007/s00299-006-0284-5
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DOI: https://doi.org/10.1007/s00299-006-0284-5