title: A functional analysis of T-DNA gene 6b: the fine tuning of cytokinin effects on shoot development.
abstract: The physiological function in planta of T-DNA gene 6b was studied under various experimental conditions. For this purpose the coding region of gene 6b was cloned behind the 1'-promoter of the TR-DNA to enhance expression of the gene product in transformed plant cells. Expression of the recombinant gene in leaf discs of Nicotiana tabacum altered the capacity for shoot formation of the discs, induced by exogenous (i.e. BAP in the growth medium or agrobacterial trans-zeatin produced under control of gene tzs) or endogenous cytokinins (i.e. isopentenyladenosine produced under control of T-DNA gene 4). The data obtained indicate a reduction of cytokinin activity within the plant cells by the product of T-DNA gene 6b.
authors.affiliation: Max-Planck-Institut für Züchtungsforschung, Köln, Federal Republic of Germany.
authors.forename: K
authors.initials: K
authors.lastname: Spanier
authors.forename: J
authors.initials: J
authors.lastname: Schell
authors.forename: P H
authors.initials: PH
authors.lastname: Schreier
mesh_terms: D001483:Base Sequence; D002454:Cell Differentiation; D003001:Cloning, Molecular; D003583:Cytokinins / Q000494:pharmacology*; D004269:DNA, Bacterial / Q000235:genetics*; D005798:Genes, Bacterial; D008969:Molecular Sequence Data; D010937:Plant Growth Regulators / Q000494:pharmacology*; D010947:Plants, Toxic; D010957:Plasmids; D011401:Promoter Regions, Genetic; D015183:Restriction Mapping; D012231:Rhizobium / Q000235:genetics*; D014026:Nicotiana / Q000235:genetics* / Q000254:growth & development
chemical_list: D003583:Cytokinins; D004269:DNA, Bacterial; D010937:Plant Growth Regulators; C036483:T-DNA