Summary
The effects of cytokinins on the different branches of the indole alkaloid pathway were investigated in Catharanthus roseus cell cultures. Addition of zeatin to a 2,4-dichlorophenoxyacetic acid-containing medium decreased tryptamine levels and increased the bioconversion of secologanin to ajmalicine. Zeatin also enhanced the geraniol-10 hydroxylase activities and modified the indole alkaloid pattern. The results are discussed in the light of previous works showing that cytokinins have a positive effect on indole alkaloid accumulation in some lines of C. roseus.
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Abbreviations
- BSTFA:
-
bis(trimethylsilyl) trifluoroacetamide
- CK:
-
cytokinin
- 2,4-D:
-
2,4-dichlorophenoxyacetic acid
- dw:
-
dry weight
- G-10H:
-
geraniol-10 hydroxylase
- NAA:
-
αnaphthaleneacetic acid
- SE:
-
standard error
- TDC:
-
tryptophan decarboxylase
- Z:
-
zeatin
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Communicated by A. M. Boudet
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Decendit, A., Petit, G., Andreu, F. et al. Putative sites of cytokinin action during their enhancing effect on indole alkaloid accumulation in periwinkle cell suspensions. Plant Cell Reports 12, 710–712 (1993). https://doi.org/10.1007/BF00233425
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DOI: https://doi.org/10.1007/BF00233425