Antioxidant Activities in Kenaf ( Hibiscus cannabinus ) Shoots during Growth Stages and Destination of Chlorogenic Acid and Kaempferol Glycosides

Apart from being utilized as a commercial fiber at maturity, kenaf shoots have potential as a food and feed source because of their diverse bioactivities. Previous studies have focused on mature stems because of their high biomass, whereas the antioxidant activities (AA) and the destination of AA co...

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Bibliographic Details
Published in:Antioxidants 2024-05, Vol.13 (5), p.532
Main Authors: Duan, Shucheng, Kwon, Soon-Jae, Jeong, Da Yun, Kim, Ji Hye, Park, You Rang, Kim, Chang Kyu, Kim, Jae-Hee, Eom, Seok Hyun
Format: Article
Language:English
Subjects:
Antioxidants
Chlorogenic acid
Feeds
Flavonoids
Food
Food sources
Glycosides
Growth
Growth stage
Isoflavones
Kaempferol
kaempferol glycosides
kenaf
Leaves
maturity stages
Phenolic acids
Phenols
Polysaccharides
Seeds
shoots
Solvents
Stems
Sulfuric acid
Temperature
Variance analysis
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Summary:Apart from being utilized as a commercial fiber at maturity, kenaf shoots have potential as a food and feed source because of their diverse bioactivities. Previous studies have focused on mature stems because of their high biomass, whereas the antioxidant activities (AA) and the destination of AA contributors of kenaf stems and their high-yielding byproduct leaves during the growth stage have rarely been studied. Therefore, we investigated changes in AA and its relative components in kenaf leaves and stems during the four vital growth stages. Higher ABTS radical cation and DPPH radical scavenging abilities and ferric reducing antioxidant power, total phenolic content, total flavonoid content, and total polysaccharide content were observed at all leaf stages and in the late stem stages. Chlorogenic acid (CGA) and kaempferol glycosides, especially kaempferitrin (Kfr), were identified as representative phenolic acids and flavonoids in both kenaf leaves and stems. The content of CGA in both leaves and stems increased corresponding to the plant's growth stage, whereas kaempferol glycosides were enhanced in leaves but declined in stems. The highest correlation was observed between TPC and AA in all organs. Further evaluation of CGA and Kfr verified that CGA was the predominant contributor to AA, surpassing Kfr. These findings suggest that kenaf leaves increase antioxidant levels as they grow and can be a useful source of stem harvesting byproducts.
ISSN:2076-3921
2076-3921
DOI:10.3390/antiox13050532