Abstract
The in vitro micropropagation of potato (Solanum tuberosum L., var. Spunta) on media containing nor-spermidine (nor-SPD), a natural polaymine (PA) or dicyclohexlamine (DCHA), a spermidine synthesis inhibitor was studied to test their effects on plantlet growth and on the level of free cellular polyamines. The triamine nor-SPD, inhibited spermidine synthesis and substantially reduced root growth. DCHA strongly inhibited potato growth but surprisingly the free spermidine level seemed unaffected. These data suggest that dicyclohexylamine acts on the growth and on the development of plants by mechanisms unrelated to polyamine metabolism. Conversely, nor-spermidine was effective in reducing cellular spermidine content and seems to be a spermidine biosynthesis inhibitor in plants.
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Masse, J., Laberche, J.C. & Jeanty, G. The effects of nor-spermidine and dicyclohexylamine on in vitro potato development and free polyamines content. Plant Growth Regul 7, 249–260 (1988). https://doi.org/10.1007/BF00037634
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DOI: https://doi.org/10.1007/BF00037634