Inhibition by Cytokinin of the Accumulation of Betacyanin in Suspension Cultures of Phytolacca americana
Open Access
- 1 October 1992
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung C
- Vol. 47 (9-10) , 705-710
- https://doi.org/10.1515/znc-1992-9-1012
Abstract
The accumulation of betacyanin was reduced by the addition of various cytokinins to suspension cultures of Phytolacca americana. The decrease in the accumulation of betacyanin was overcome by exogenously supplied tyrosine which is a precursor of betacyanin. Benzylaminopurine (BAP) decreased the level of free tyrosine in the cells. Feeding experiments using labeled tyrosine revealed that BAP reduced the incorporation of labeled tyrosine into betacyanins (to about 50% of the control rate). These results suggest that both the availability of tyrosine and the biosynthetic activity of the pathway from tyrosine to the betacyanins are involved in the inhibition of the accumulation of betacyanins by cytokinins in Phytolacca americana cells.Keywords
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