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. 1991 Sep;97(1):288–297. doi: 10.1104/pp.97.1.288

Activity and Accumulation of Cell Division-Promoting Phenolics in Tobacco Tissue Cultures 1

Rita A Teutonico 1,2,2, Matthew W Dudley 1,2, John D Orr 1,2,3, David G Lynn 1,2, Andrew N Binns 1,2
PMCID: PMC1080996  PMID: 16668384

Abstract

Dehydrodiconiferyl alcohol glucosides (DCGs) are derivatives of the phenylpropanoid pathway that have been isolated from Catharansus roseus L. (Vinca rosea) crown gall tumors. Fractions containing purified DCGs have been shown previously to promote the growth of cytokinin-requiring tissues of tobacco in the absence of exogenous cytokinins. In this study, we utilized synthetic DCG isomers to confirm the cell division-promoting activity of DCG isomers A and B and show that they neither promote shoot meristem initiation on Nicotiana tabacum L., cv Havana 425, leaf explants nor induce betacyanin synthesis in amaranth seedlings. Analysis of cultured tobacco pith tissue demonstrated that DCG accumulation was stimulated by cytokinin treatment and correlated with cytokinin-induced cell division. Thus, the accumulation of metabolites that could replace cytokinin in cell division bioassays is stimulated by cytokinins. These data support the model that DCGs are a component of a cytokinin-mediated regulatory circuit controlling cell division.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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