Summary
Agrobacterium-mediated gene transformation of Populus tremuloides Michx was accomplished by co-cultivation of leaf disks excised from greenhouse plants with Agrobacterium tumefaciens containing a binary Ti-plasmid vector harboring chimeric neomycin phosphotransferase (NPT II) and ß-glucuronidase (GUS) genes. Shoot regeneration in the presence of kanamycin was achieved when thidiazuron (TDZ) was used as a plant growth regulator. Transformation was verified by amplification of NPT II and GUS gene fragments from genomic DNA of transgenic plants with polymerase chain reaction (PCR) and integration of these genes into nuclear genome of transgenic plants was confirmed by genomic Southern hybridization analysis. Histochemical assay revealed the expression of GUS gene in leaf, stem and root tissues of transgenic plants, further confirming the integration and expression of T-DNA in these plants. This protocol allows effective transformation and regeneration of quaking aspen using greenhouse-grown materials as an explant source. Whole plant regeneration from cuttings of fieldgrown mature quaking aspen and hybrid poplar (P. alba x P. grandidentata) was also readily achieved by using this protocol, which represents a potential system for producing transgenic quaking aspen and hybrid poplar of valuable genotypes.
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Abbreviations
- AMV RNA4:
-
Alfalfa mosaic virus RNA4
- BA:
-
6-benzyladenine
- CaMV:
-
cauliflower mosaic virus
- 2,4-D:
-
2,4-dichlorophenoxyacetic acid
- EDTA:
-
ethylenediaminetetraacetic acid
- FAA:
-
formalin-acetic acid-alcohol
- GUS:
-
ß-glucuronidase
- NAA:
-
1-naphthylacetic acid
- NPT II:
-
neomycin phosphotransferase II
- PCR:
-
polymerase chain reaction
- SDS:
-
sodium dodecyl sulphate
- TE:
-
Tris-Cl/EDTA
- TDZ:
-
N-phenyl-N′-1,2,3-thiadiazol-5-yl-urea (thidiazuron)
- WPM:
-
woody plant medium (Lloyd and McCown 1980)
- X-GLUC:
-
5-bromo-4-chloro-3-indolyl-ß-glucuronic acid
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Communicated by J. Widholm
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Tsai, CJ., Podila, G.K. & Chiang, V.L. Agrobacterium-mediated transformation of quaking aspen (Populus tremuloides) and regeneration of transgenic plants. Plant Cell Reports 14, 94–97 (1994). https://doi.org/10.1007/BF00233768
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DOI: https://doi.org/10.1007/BF00233768
Keywords
- Transgenic Plant
- Neomycin
- Thidiazuron
- Hybrid Poplar
- Neomycin Phosphotransferase