title: Direct gene transfer in potato: a comparison of particle bombardment of leaf explants and PEG-mediated transformation of protoplasts.
abstract: Direct gene transfer methods in potato would facilitate the transfer of multiple genes and the manipulation of metabolic pathways in this species. In this study, up to 1.8 transformation events per shot (=0.5 per bombarded leaf) and 67.2 events per million protoplasts treated were obtained with particle bombardment and PEG-mediated direct DNA uptake, respectively. Limited disassociation of both HPT and GUS genes appeared to occur during the process of integration in only 19% of transformants. A large number of transformed potato plants with transgene expression at levels comparable to Agrobacterium-mediated transformation was obtained. High levels of GUS expression were only obtained in lines derived from PEG treatment. No correlation between the number of gene insertions and gene expression levels was found, suggesting that multiple insertions may have little or no effect on transgene expression.
authors.affiliation: CNR-IGV, Institute of Plant Genetics, Res. Div. Portici, via Università 133, 80055 Portici (NA), Italy.
authors.forename: W
authors.initials: W
authors.lastname: Craig
authors.forename: D
authors.initials: D
authors.lastname: Gargano
authors.forename: N
authors.initials: N
authors.lastname: Scotti
authors.forename: T T
authors.initials: TT
authors.lastname: Nguyen
authors.forename: N T
authors.initials: NT
authors.lastname: Lao
authors.forename: T A
authors.initials: TA
authors.lastname: Kavanagh
authors.forename: P J
authors.initials: PJ
authors.lastname: Dix
authors.forename: T
authors.initials: T
authors.lastname: Cardi
mesh_terms: D019470:Biolistics / Q000379:methods*; D004337:Drug Carriers / Q000494:pharmacology; D018506:Gene Expression Regulation, Plant / Q000235:genetics; D018014:Gene Transfer Techniques; D017343:Genes, Plant / Q000235:genetics; D005822:Genetic Vectors; D018515:Plant Leaves / Q000235:genetics / Q000378:metabolism; D011092:Polyethylene Glycols / Q000494:pharmacology*; D011523:Protoplasts / Q000378:metabolism*; D011198:Solanum tuberosum / Q000235:genetics* / Q000378:metabolism; D014170:Transformation, Genetic / Q000187:drug effects / Q000235:genetics*; D019076:Transgenes / Q000235:genetics
chemical_list: D004337:Drug Carriers; D011092:Polyethylene Glycols