The potential of producing CYNARIN (cas 19870-46-3) in Cynara scolymus L. suspension cultures in relation to their antioxidant profile

Add time:09/28/2019    Source:infona.pl

Recent studies revealed that reactive oxygen species, antioxidants and related redox signals are key elements in the regulation of plant defense responses, including the synthesis of secondary metabolites. In this work the potential of artichoke (Cynara scolymus L.) cell suspensions to produce CYNARIN (cas 19870-46-3) was studied in relation to the antioxidant profile of the cultures. There were determined the total antioxidant capacity and concentrations of H₂O₂, ascorbate and total phenolics, as well as activities of ascorbate and guaiacol peroxidases, ascorbate oxidase and catalase at different stages of the culture growth cycle in relation to the production of cynarin. Suspension cultures revealed a growth-linked capacity to produce cynarin as identified by qualitative HPLC analysis. The cynarin accumulation kinetics during the exponential phase of growth correlated with the total antioxidant capacity of water-soluble antioxidants whereas the profiles of total phenols and total antioxidant capacity of water-insoluble antioxidants differed. The lowest ascorbate-related antioxidant capacity coincided with the maximum cynarin accumulation in the early stationary phase. The regulation of growth-related prooxidant/antioxidant balance in the artichoke suspension cultures involved the peroxidase/phenolics/ascorbate system scavenging H₂O₂, further affected by ascorbate- and H₂O₂-metabolizing enzymes. These results may be of interest in biotechnological strategies aimed at optimizing the production of secondary metabolites in plant cultures in vitro.

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