Abstract
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 language | English |
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Pages (from-to) | 57-65 |
Number of pages | 9 |
Journal | Planta |
Volume | 90 |
Issue number | 1 |
DOIs | |
State | Published - 1 Mar 1969 |
Externally published | Yes |
ASJC Scopus subject areas
- Genetics
- Plant Science