title: Stable transformation of embryogenic tissues of Pinus nigra Arn. using a biolistic method.
abstract: The stable transformation of embryogenic tissues of Pinus nigra Arn., cell line E104, has been achieved using a biolistic approach. The introduced DNA consisted of the uidA reporter gene under the control of the double CaMV 35S promoter and the nptII selection gene controlled by the single CaMV 35S promoter. Three days after bombardment, putative transformed tissues were selected for continued proliferation on a medium containing 20 mg geneticin l(-1). Resistant embryogenic tissue recovery required 10-12 weeks. The integration of the nptII and uidA genes was confirmed by both histochemical/fluorimetric GUS assays and PCR amplification of the inserts in the five geneticin resistant sub-lines of line E104. The activity of the uidA reporter gene in transgenic, embryogenic tissue lines was stable and could be detected after one year of culture. Somatic embryo maturation was, however, poor and no plantlet regeneration could be obtained.
authors.affiliation: Institute of Plant Genetics and Biotechnology, Slovak Academy of Sciences, Akademická 2, P.O. Box 39 A, 950 07, Nitra 1, Slovak Republic.
authors.forename: Terézia
authors.initials: T
authors.lastname: Salaj
authors.forename: Jana
authors.initials: J
authors.lastname: Moravcíková
authors.forename: Laurence
authors.initials: L
authors.lastname: Grec-Niquet
authors.forename: Ján
authors.initials: J
authors.lastname: Salaj
mesh_terms: D019470:Biolistics / Q000379:methods*; D002460:Cell Line; D018744:DNA, Plant / Q000032:analysis / Q000235:genetics; D005966:Glucuronidase / Q000235:genetics / Q000378:metabolism; D006651:Histocytochemistry; D028223:Pinus / Q000166:cytology / Q000196:embryology / Q000235:genetics*; D030821:Plants, Genetically Modified; D016133:Polymerase Chain Reaction; D011993:Recombinant Fusion Proteins / Q000235:genetics / Q000378:metabolism; D012639:Seeds / Q000166:cytology / Q000235:genetics*; D014170:Transformation, Genetic
chemical_list: D018744:DNA, Plant; D011993:Recombinant Fusion Proteins; D005966:Glucuronidase