Dl alpha di fluoromethyl ornithine causes enlargement of cultured tobacco nicotiana tabacum cultivar xanthi

Berlin, J.; Forche, E.

Zeitschrift fuer Pflanzenphysiologie 101(3): 277-282


Accession: 005184702

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Remarkable increases in fresh and dry weight during the first days of a growth cycle were observed when the tobacco cell line TX1 (N. tabacum L. cv. Xanthi) was grown in the presence of 0.1 to 0.5 mM DL-.alpha.-difluoromethyl ornithine (DFMeOrn). Depending upon the concentration DFMeOrn inhibited cell division but caused unusually great cell enlargement. In the presence of DFMeOrn cells turned white due to the loss of carotenoids. The biosynthesis of cinnamoyl putrescines was not reduced by the ornithine decarboxylase (ODC) inhibitor DFMeOrn, although ODC activity was not detected in DFMeOrn treated cells.