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Phytochemistry Reviews

, Volume 17, Issue 6, pp 1239–1251 | Cite as

Erysimum cheiranthoides, an ecological research system with potential as a genetic and genomic model for studying cardiac glycoside biosynthesis

  • Tobias Züst
  • Mahdieh Mirzaei
  • Georg Jander
Article

Abstract

At least twelve plant families contain species that synthesize cardiac glycosides as defense against herbivory. These inhibitors of animal Na+, K+-ATPases also have medical uses in treating congestive heart failure and other diseases. However, despite extensive ecological research and centuries of use in both traditional and modern medicine, the complete cardiac glycoside biosynthesis pathway has yet to be elucidated in any plant species. To a large extent, this research deficit results from the fact that cardiac glycosides are produced exclusively by non-model plant species such as Digitalis that have not been amenable to the development of mutagenesis, cloning, and genetic mapping approaches. Recent advances in genome sequencing, transcript profiling, plant transformation, transient expression assays, and plant metabolite analysis have provided new opportunities for the investigation and elucidation of cardiac glycoside biosynthesis pathways. The genetic tools that have been developed for Brassicaceae, in particular Arabidopsis thaliana, may be directly applicable to Erysimum, a Brassicaceae genus that characteristically produces cardiac glycosides as defensive metabolites. We propose that Erysimum cheiranthoides (wormseed wallflower), a rapid-cycling, self-pollinating species with a relatively small, diploid genome, would be a suitable model system to advance research on the biosynthesis of cardiac glycosides in plants.

Keywords

Erysimum cheiranthoides Wallflower Cardiac glycoside Cardenolide Model system 

Notes

Acknowledgements

We thank Georg Petschenka for the E. cheiranthoides photograph in Fig. 1a, and Kaitlin Pidgeon and Suzy Strickler for experimental assistance. Funding for this work was provided by Swiss National Science Foundation Grant PZ00P3-161472 to T.Z., a fellowship from the Ministry of Science, Research, and Technology of Iran to M.M., and a Triad Foundation Grant and US National Science Foundation award IOS-1645256 to G.J.

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Authors and Affiliations

  1. 1.Institute of Plant SciencesUniversity of BernBernSwitzerland
  2. 2.Boyce Thompson InstituteIthacaUSA

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