Phytochemical Composition and Antioxidant Activities of Two Different Color Chrysanthemum Flower Teas

Han AR, Nam B, Kim BR, Lee KC, Song BS, Kim SH, Kim JB, Jin CH. · Molecules · 2019 January

DOI 10.3390/molecules24020329

Objective

To identify and evaluate the tea infusion made with a γ-irradiated mutant chrysanthemum cultivar with dark purple petals (cv. ARTI-Dark Chocolate), its phytochemical composition and antioxidant activity were tested and compared with those of the commercially available chrysanthemum cultivar with yellow petals (cv. Gamguk) by HPLC-DAD-ESIMS, as well as DPPH and ABTS radical scavenging assays.

Conclusions

Both chrysanthemum flower teas exhibited strong ABTS radical scavenging effects ranging from 76% to 61% under all infusing conditions. Therefore, the purple chrysanthemum cultivar, ARTI-Dark Chocolate, is worthy of breeding as a new tea cultivar.

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Insights

The purple chrysanthemum tea, imbued with unique antioxidants and affected by infusion time, showed comparatively higher antioxidant activity than the yellow chrysanthemum.

Methodologically, the researchers used a variety of testing methods to analyze the phytochemical composition and antioxidant activity of the γ-irradiated mutant chrysanthemum cultivar with dark purple petals (ARTI-Dark Chocolate) and the conventional yellow variety (Gamguk). The influence of different water temperatures and infusion time on the content and activity was also investigated. In addition, the floral scent of both tea types were investigated using spectrometry. Discussion of the results indicates that the phytochemical profiles of both the yellow and purple chrysanthemum teas varied significantly. Purple chrysanthemum tea contained anthocyanins and linarin, which were not present in the yellow variety, and had higher levels of certain compounds. The infusion time and temperature also impacted the purple variety more than the yellow, with the highest total compound content appearing at 100 °C after 4 minutes of infusion. In the antioxidant tests, the purple chrysanthemum tea demonstrated superior antioxidant activity, which was attributed to its high anthocyanin content. In all infusing conditions, both teas presented strong radical scavenging effects.