A study of the hypothetical role of cytokinins in completion of tRNA

A. Richmond, A. Back, Betsy Sachs

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


It has been suggested that the effect of cytokinins in retarding leaf senescence comes about through their incorporation into tRNA. To test this hypothesis, kinetin-8-14C, 6-benzylaminopurine-benzyl-7-14C and adenine-8-3H were applied to detached tobacco leaves, and the nucleic acids were thereafter extracted and chromatographed on MAK columns. Kinetin-8-14C and adenine-8-3H were readily incorporated into RNA in a similar pattern. 6-Benzylaminopurine-benzyl-7-14C was effective in delaying chlorophyll loss but was not incorporated into any nucleic-acid fraction. It is concluded that the possibility of cytokinins retarding leaf senescence by completion of tRNA is not supported.

Original languageEnglish
Pages (from-to)57-65
Number of pages9
Issue number1
StatePublished - 1 Mar 1969
Externally publishedYes

ASJC Scopus subject areas

  • Genetics
  • Plant Science


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