Abstract
Plants are important sources of chemical compounds with various applications. These are usually associated with the secondary metabolism of plants which is tightly linked to the interactions with the surrounding environment. These compounds usually accumulate in low amounts, sometimes leading to the overexploitation of the source plant. Hence, development of alternative platforms for the production of these compounds represents a more sustainable solution. Among such platforms, hairy roots (HR) cultures are often used for their ability to produce the same secondary metabolites as the original plant. Cynara cardunculus L. or cardoon has been used in folk medicine to treat various diseases. Distinct parts of the plant have been studied and found to produce secondary metabolites with health promoting properties. In this work, HR cultures from cardoon were characterized regarding their secondary metabolites production and potential biological activities. Methanolic extracts contained compounds that belong, almost exclusively, to the hydroxycinnamic acid group. These extracts showed maximum total phenolic content and antioxidant activity of 46 mg GAE/g DW and 98 μmolTE/g DW, respectively, at day 35 of the growth curve. This extract also showed antiproliferative activity on colorectal cancer cells (EC50 1.16 ± 0.07 mg/mL). This work demonstrates the potential of cardoon HR as alternative sources for valuable hydroxycinnamic acid compounds with important biological activities.
Key message
Hairy root cultures from cardoon produced mainly hydroxycinnamic acid compounds, which showed antioxidant activity and antiproliferative properties on colorectal cancer cell lines.
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Abbreviations
- 1,5-DCQA:
-
1,5-O-Dicaffeoylquinic acid
- AUC:
-
Area under the curve
- CGA:
-
Chlorogenic acid
- DW:
-
Dry weight
- FC:
-
Folin-Ciocalteu reagent
- GAE:
-
Gallic acid equivalent
- HPLC-MS:
-
High Performance Liquid Chromatography-Mass Spectrometry
- HR:
-
Hairy roots
- ORAC:
-
Oxygen radical absorbance capacity
- TE:
-
Trolox equivalent
- TPC:
-
Total phenolic content
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Acknowledgements
This work was supported by Fundação para a Ciência e Tecnologia (FCT, Portugal) through project ref. PTDC/BAA-AGR/30447/2017, Research Unit ref. UIDB/04551/2020 and PhD Fellowship to AF (ref. PD/BD/114488/2016, Plants for Life PhD Program), Portuguese Mass Spectrometry Network (Rede Nacional de Espectrometria de Massa—RNEM; Lisboa-01-0145-FEDER-402-022125), iNOVA4Health-UIDB/04462/2020 and INTERFACE Program (Innovation, Technology and Circular Economy Fund (FITEC). The authors wish to thank Ana Bárbara Pereira for technical support in the preparation of cell extracts.
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Folgado, A., Serra, A.T., Prazeres, I. et al. Hairy root cultures of Cynara cardunculus L. as a valuable source of hydroxycinnamic acid compounds. Plant Cell Tiss Organ Cult 147, 37–47 (2021). https://doi.org/10.1007/s11240-021-02102-6
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DOI: https://doi.org/10.1007/s11240-021-02102-6