Comparison of cytokinin activities of naturally occurring ribonucleosides and corresponding bases

Ruth Y. Schmitz, Folke Skoog, Sidney M. Hecht, Robert M. Bock, Nelson J. Leonard

Research output: Contribution to journalArticlepeer-review

28 Scopus citations


Cytokinin activities in the tobacco bioassay have been determined for four adenosine derivatives known to be components of wheat germ tRNA: 6-(4-hydroxy-3-methyl-2-butenylamino)-9-β-d-ribofuranosylpurine, 6-(3-methyl-2-butenylamino)-9-β-d-ribofuranosylpurine, 6-(4-hydroxy-3-methyl-2-butenylamino)- 2-methylthio-9-β-d-ribofuranosylpurine, and 6-(3-methyl-2-butenylamino)-2-methylthio-9-β-d-ribofuranosylpurine. Also determined and compared with the four natural components of tRNA were the activities of the four 3-methylbutylamino analogs of the naturally occurring species and the eight substituted purines corresponding to both sets of ribonucleosides. The systematic structural modifications within this group of sixteen compounds were reflected in the variations in cytokinin activity with the level of modification.

Original languageEnglish (US)
Pages (from-to)1603-1610
Number of pages8
Issue number5
StatePublished - May 1972
Externally publishedYes


  • Cytokinins
  • natural ribonucleosides
  • plant hormones, activity comparisons

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Plant Science
  • Horticulture


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