Abstract
To examine the effect of the T-cell growth factor (human interleukin-2), we constructed a binary vector, pSSK-1, carrying the recombinant human interleukin-2 (rhlL-2) gene, and transferred it intoAsrobacterium tumefaciens. Using this construct, we then transformed potato explants(Solanum tuberosum cv. Superior), achieving 100% regeneration of shoots on a modified MS medium. Of the putative transformed shoots, 81% rooted and were selected on 200 ms/L kanamycin. Both Southern and northern analyses verified the transformation events. An ELISA test also indicated that the rhlL-2 protein was produced from rhlL-2-transformed potatoes. To determine whether this protein was biologically active in the potato cells, we performed a biological assay using the 11.-2 dependent cell line, CTLL-2. The suspension containing extract from the transformants showed significant proliferation of the 11.-2 dependent CTLL-2 cells, whereas cells did not proliferate in the nontransformed potato. We then grew the verified rhlL-2 transgenic potatoes in soil, and compared their performance with that of nontransgenic potatoes as well as those that had been transformed with GUS. Growth rates, as calculated from plant heights, were up to 50% higher than for either the nontrans-genic or the GUS-transformed potatoes. Similar patterns were found withArabidopsis thaliana plants treated in the same manner. All of these results suggest that rhlLo2 may function as a growth factor in potato.
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Park, Y., Cheong, H. The effect of the recombinant human interleukin-2 Gene in potato (Solanum tuberosum cv. superior). J. Plant Biol. 44, 193–198 (2001). https://doi.org/10.1007/BF03030351
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DOI: https://doi.org/10.1007/BF03030351