Abstract
We report a new protocol for the stable transformation of Larix gmelinii. Thirty mature zygotic embryos precultured for 3 days on solid medium supplemented with benzyladenine were bombarded with plasmids pUC-GHG (GUS, HPT, and GFP genes) or pBI221-HPT (HPT and GUS genes). After a 2-month culture on selection medium, hygromycin-resistant calli appeared on the surfaces of the necrotic embryos. The frequencies of embryos with resistant calli were 18.4% and 17.4% in the transformations with pUC-GHG and pBI221-HPT DNA, respectively. More than 20 adventitious shoots formed from each of the transgenic calli. Of 17 elongated shoots selected for culturing on a rooting medium, five shoots rooted after 2 months. Expression of the GFP and GUS genes was detected in the resistant tissues by microscopic observations and by a histological GUS activity assay, respectively. PCR and Southern analysis confirmed the stable insertion of the introduced DNA into the genome.
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Abbreviations
- BA:
-
Benzyladenine
- GFP:
-
Green fluorescent protein
- GUS:
-
β-Glucuronidase
- HPT:
-
Hygromycin phosphotransferase
- IBA:
-
Indole-3-butyric acid
- NAA:
-
α-Naphthaleneacetic acid
- NOSt:
-
Terminator of nopaline synthase gene
- 35Sp:
-
Promoter of 35S RNA of cauliflower mosaic virus
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Acknowledgements
We thank Dr. K. Nakamura (Nagoya University) and Dr. Y. Niwa (University of Shizuoka) for kindly providing us with the pBI101-GUS-HPT and pUC-pCaMV35S-sGFP (S65T)-nos3′ vectors, respectively. This study was supported in part by Grants-in-Aid for the Encouragement of Young Scientists to HT from the Japan Society for the Promotion of Science, by the Program for the Promotion of Basic Research Activities for Innovative Biosciences (PROBRAIN to HT), and by the 21st Century COE program of Pulsed Power Science (H T)
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Communicated by S.A. Merkle
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Lin, X., Zhang, W., Takechi, K. et al. Stable genetic transformation of Larix gmelinii L. by particle bombardment of zygotic embryos. Plant Cell Rep 24, 418–425 (2005). https://doi.org/10.1007/s00299-005-0955-7
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DOI: https://doi.org/10.1007/s00299-005-0955-7