Abstract
The expression of genes for synthesis of auxin (iaaM and iaaH) and cytokinins (ipt) was studied in tobacco plants transformed by two Agrobacterium tumefaciens strains C 58 and LBA 4404. The strain LBA 4404 carried binary vector plasmid pCB 1334 (ipt gene) and plasmid pCB 1349 (iaaM, iaaH and ila genes). Both plasmids carried reportered gene for npt II. Obtained plants expressed incorporated genes. New proteins with molecular masses of about 74, 40, 26, 25, 21 and 17 kDa for wild plasmid pTi C58; 60, 36, 31.5, 27, 26 and 17 kDa for binary vector plasmid pCB 1334 and 74, 49, 36, 31.5, 26 and 25 kDa for binary vector plasmid pCB 1349 were found in the patterns of soluble proteins. Significant changes in the content of chlorophylls, especially chlorophyll a, were detected in the plants carrying ipt gene and in plants transformed by the wild strain C58 of A. tumefaciens. Tobacco plants expressing ipt gene and genes from T-DNA of pTi C58 plasmid were dwarf, and in comparison to the controls, they had thicker stems, and the surface of the leaf blades was reduced to 20 - 50 %. Adventitious roots, growing from the stem, were typical for transformants overproducing auxins. Regenerants and transformants expressing genes from T-DNA of plasmid pTi C58 differed in the shape of the flowers and their fertility.
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Hlinková, E., Obert, B. & Filipp, D. Phenotypes of Tobacco Plants Expressing Genes for the Synthesis of Growth Regulators. Biologia Plantarum 41, 25–37 (1998). https://doi.org/10.1023/A:1001748129584
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DOI: https://doi.org/10.1023/A:1001748129584