Abstract
Split embryonic axes of 21-day-old immature sunflower (Helianthus annuus L. var. RHA266) embryos were bombarded, vacuum infiltrated, or dehydrated before being infected byAgrobacterium tumefaciens strain EHA 105, bearing a binary vector carrying the selectable markerNPTII and the scorable markeruidA gene. RHA266 was found to be particularly sensitive to in vitro culture and recalcitrant to organogenesis. Of the 3 methods used, only dehydration and rehydration withAgrobacterium gave rise to transient GUS expression in shoot apices and stably transformed plants as confirmed by Southern blotting analysis.
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Abbreviations
- BAP:
-
6-Benzylaminopurine
- MS:
-
Murashige-Skoog
- NAA:
-
naphthaleneacetic acid
- NPTII :
-
neomycin phosphotransferase gene
- OD:
-
optical density
- T-DNA:
-
transferred DNA
- uidA (GUS):
-
β-glucuronidase
- X-Gluc:
-
5-bromo-4-chloro-3-indoyl-β-D-glucuronide
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Hewezi, T., Perrault, A., Alibert, G. et al. Dehydrating immature embryo split apices and rehydrating withAgrobacterium tumefaciens: A new method for genetically transforming recalcitrant sunflower. Plant Mol Biol Rep 20, 335–345 (2002). https://doi.org/10.1007/BF02772121
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DOI: https://doi.org/10.1007/BF02772121