Carotenoid Assessments and Antioxidant Activities from Flower Petals

Abstract

The objectives of this study were to evaluate carotenoid pigment profile and the antioxidant activity from 14 commonly grown flowers in Thailand. The result found that orange marigold showed the highest total carotenoid content at as 2,209±75.58 µg/g, followed by deep yellow chrysanthemum at 551.27±47.72 µg/g (P<0.01). The next lower total carotenoid content group was found in yellow silk cotton, yellow trumpetbush, yellow marigold and yellow golden shower with total carotenoid content of 447.42±27.56, 429.46±28.34, 409.85±34.58 and 363.88±12.74 µg/g, respectively. The highest antioxidant activities against DPPH and ABTS radicles were found from orange marigold, which were 32.34±2.16 and 50.08±0.87%, respectively. Deep yellow chrysanthemum, yellow silk cotton, yellow trumpetbush, yellow marigold and yellow golden shower also showed significantly higher antioxidant activities than other flowers (P<0.01). Total carotenoid contents well correlated with antioxidant activities against DPPH and ABTS radicals (r = 0.6924 and r = 0.8270, respectively) at P<0.01. TLC result elucidated that orange marigold, yellow silk cotton and yellow golden shower were a good source of β-carotene, while deep yellow chrysanthemum and yellow marigold were a good source of lutein and/or zeaxanthin. The result indicated that flower petals would be useful as natural carotenoid source and provide antioxidants for food industry.

A Brief Review of Efficacious Plants in the World: <i>Tagetes</i> (Marigold)

“…Some important chemical agents are found in the marigold extract, such as phenylpropanoids, carotenoids, flavonoids, thiophenes, quercetagetin, 6-hydroxykaempferol, quercetin, patuletin, quercetagetin-7-Oglucoside and others (Bhave et al 2020;Ratananikom et al 2021;Devrnja et al 2022). The compound produced by plants could vary depending on some factors: part of plant extracted, harvesting seasons, plant development stage, and geographical conditions (Salehi et al 2018).…”