Antioxidant properties of Hibiscus: species variation altitudinal change coastal influence and floral colour change

Wong S. K., . and Lim Y. Y., . and Chan E. W. C., . Antioxidant properties of Hibiscus: species variation altitudinal change coastal influence and floral colour change. pp. 307-315. ISSN 0128-1283

Antioxidant properties (AOP) of leaves and flowers of six Hibiscus species were screened. For leaves of Hibiscus rosa-sinensis and Hibiscus tiliaceus the effects of altitudinal change and coastal influence respectively were assessed. Flowers of Hibiscus mutabilis during colour change were analysed. AOP evaluated were total phenolic content (TPC) total anthocyanin content (TAC) radical-scavenging activity expressed as ascorbic acid equivalent antioxidant capacity (AEAC) ferric-reducing power (FRP) and ferrous ion-chelating (FIC) ability. TPC AEAC and FRP of leaves and flowers of H. tiliaceus were the greatest. The red flowers of H. rosa-sinensis and Hibiscus schizopetalus yielded the highest TAC and FIC ability. The AOP of leaves of highland populations of H. rosa-sinensis were greater than those of lowland. There was no distinct variation in AOP of leaves of inland and coastal populations of H. tiliaceus. The AOP of red flowers of H. mutabilis were greater than those of pink and/or white flowers. Overall ranking of flowers during colour change was red pink white.

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Abstract

Antioxidant properties (AOP) of leaves and flowers of six Hibiscus species were screened. For leaves of Hibiscus rosa-sinensis and Hibiscus tiliaceus the effects of altitudinal change and coastal influence respectively were assessed. Flowers of Hibiscus mutabilis during colour change were analysed. AOP evaluated were total phenolic content (TPC) total anthocyanin content (TAC) radical-scavenging activity expressed as ascorbic acid equivalent antioxidant capacity (AEAC) ferric-reducing power (FRP) and ferrous ion-chelating (FIC) ability. TPC AEAC and FRP of leaves and flowers of H. tiliaceus were the greatest. The red flowers of H. rosa-sinensis and Hibiscus schizopetalus yielded the highest TAC and FIC ability. The AOP of leaves of highland populations of H. rosa-sinensis were greater than those of lowland. There was no distinct variation in AOP of leaves of inland and coastal populations of H. tiliaceus. The AOP of red flowers of H. mutabilis were greater than those of pink and/or white flowers. Overall ranking of flowers during colour change was red pink white.

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Item Type:	Article
AGROVOC Term:	Antioxidants
AGROVOC Term:	Hibiscus
AGROVOC Term:	Species diversity
AGROVOC Term:	Flowers
AGROVOC Term:	Hibiscus mutabilis
AGROVOC Term:	Colour
AGROVOC Term:	Phenolic content
AGROVOC Term:	Anthocyanins
AGROVOC Term:	Ascorbic acid
AGROVOC Term:	Hibiscus schizopetalus
Geographical Term:	Malaysia
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	26 Apr 2025 15:31
URI:	http://webagris.upm.edu.my/id/eprint/21690

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