Summary
A simple and efficient gene transfer system of trifoliate orange (Poncirus trifoliata Raf.) was developed using epicotyl segments. The segments were infected with Agrobacterium harboring the binary vector pBI121 or pBI101-O12-p1. Both vectors contained the neomycin phosphotransferase II (NPTII) and the β-glucuronidase (GUS) genes. In the plasmid pBI101-O12-p1, the GUS gene was directed to the promoter region of ORF12 (rolC) of the Ri plasmid. On a selection medium containing 100 or 200 μg/ml kanamycin, adventitious shoots were formed from 21.7–44.6% of the segments. Histochemical GUS assay showed that 55.4–87.7% of the shoots expressed the GUS gene. The stable integration of this gene was also confirmed by polymerase chain reaction (PCR) analysis and by Southern blot analysis. When the pBI101-O12-p1 plasmid was used, the GUS activity was found to be located in phloem cells of leaf, stem and root. More than 100 transformed plants were obtained using this method within 2–3 months.
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Communicated by K. Shimamoto
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Kaneyoshi (Hiramatsu), J., Kobayashi, S., Nakamura, Y. et al. A simple and efficient gene transfer system of trifoliate orange (Poncirus trifoliata Raf.). Plant Cell Reports 13, 541–545 (1994). https://doi.org/10.1007/BF00234507
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DOI: https://doi.org/10.1007/BF00234507