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Vanadium elicitation of Trifolium pratense L. cell culture and possible pathways of produced isoflavones transport across the plasma membrane

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Vanadium compounds increased the content and release of distinct isoflavones in a Trifolium pratense suspension culture. Regarding transport-mechanism inhibitors, the process was mostly facilitated by ABC proteins and vesicular transport.

Abstract

The transport of isoflavones and other secondary metabolites is an important part of metabolism within plants and cultures in vitro regarding their role in defence against various abiotic and biotic stressors. This research focuses on the way how to increase production and exudation of isoflavones by application of chemical elicitor and the basic identification of their transport mechanisms across cell membranes. The release of five isoflavones (genistin, genistein, biochanin A, daidzein, and formononetin) into a nutrient medium was determined in a Trifolium pratense var. DO-8 suspension culture after two vanadium compound treatments and cultivation for 24 and 48 h. The NH4VO3 solution caused a higher concentration of isoflavones in the medium after 24 h. This increased content of secondary metabolites was subsequently suppressed by distinct transport-mechanism inhibitors. The transport of isoflavones in T. pratense was mostly affected by ABC inhibitors from the multidrug-resistance-associated protein subfamily, but the genistein concentration in the medium was lower after treatment with multidrug-resistance protein subfamily inhibitors. Brefeldin A, which blocks vesicular transport, also decreased the concentration of some isoflavones in the nutrient medium.

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Abbreviations

ABC:

ATP-binding cassette protein

MATE:

Multidrug and toxin extrusion protein

MDR:

Multidrug-resistance protein

MRP:

Multidrug-resistance-associated protein

PAL:

Phenylalanine ammonia-lyase

PDR:

Pleiotropic drug-resistance protein

ROS:

Reactive oxygen species

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Acknowledgements

We would like to thank Dr. Marie Kasparova (Department of Pharmacognosy, Charles University in Prague) who provided the red clover callus culture. Miroslava Karlova, Adela Kohoutkova and Marketa Simunkova also helped with the technical background.

Funding

This research was supported by the Ministry of Education, Youth and Sports of the Czech Republic, Projects No. SVV 260 416 and Project S grant.

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Correspondence to Milan Skalicky.

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The authors declare that they have no conflict of interest.

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Communicated by Salim Al-Babili.

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Kubes, J., Skalicky, M., Tumova, L. et al. Vanadium elicitation of Trifolium pratense L. cell culture and possible pathways of produced isoflavones transport across the plasma membrane. Plant Cell Rep 38, 657–671 (2019). https://doi.org/10.1007/s00299-019-02397-y

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  • DOI: https://doi.org/10.1007/s00299-019-02397-y

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