Abstract
14C-labelled benzyladenine-7-glucoside (0.57 μM) supplied to cytokinin-requiring Nicotiana tabacum (cv. Wisconsin 38) cells cultivated in liquid medium was slowly absorbed and resulted in rather large intracellular quantities of benzyladenine-7-glucoside (30 pmol/105 cells) but did not show any biological activity, while 0.01 μM benzyladenosine induced cell division. In this case the resulting intracellular quantity of benzyladenine-7-glucoside formed was 3.3 pmol/105 cells. Also, N6-(Δ2-isopentenyl)adenosine induced cell division in these tobacco suspensions without being significantly 7-glucosylated. These data provide strong evidence that the 7-glucosylation of cytokinins is not a prerequisite of the expression of their biological activity.
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Abbreviations
- bz6adenine:
-
benzyladenine
- i6adenosine:
-
N6(Δ2-isopentenyl)adenosine
References
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Laloue, M. Cytokinins: 7-glucosylation is not a prerequisite of the expression of their biological activity. Planta 134, 273–275 (1977). https://doi.org/10.1007/BF00384193
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DOI: https://doi.org/10.1007/BF00384193