Seasonal variation in Hibiscus sabdariffa (Roselle) calyx phytochemical profile, soluble solids and α-glucosidase inhibition

Idolo Ifie, Beatrice E. Ifie, Dorcas O. Ibitoye, Lisa J. Marshall, Gary Williamson

Research output: Contribution to journalArticleResearchpeer-review

11 Citations (Scopus)

Abstract

Seasonal variations in crops can alter the profile and amount of constituent compounds and consequentially any biological activity. Differences in phytochemical profile, total phenolic content and inhibitory activity on α-glucosidase (maltase) of Hibiscus sabdariffa calyces grown in South Western Nigeria were determined over wet and dry seasons. The phenolic profile, organic acids and sugars were analysed using HPLC, while inhibition of rat intestinal maltase was measured enzymically. There was a significant increase (1.4-fold; p ≤ 0.05) in total anthocyanin content in the dry compared to wet planting seasons, and maltase inhibition from the dry season was slightly more potent (1.15-fold, p ≤ 0.05). Fructose (1.8-fold), glucose (1.8-fold) and malic acid (3.7-fold) were significantly higher (p ≤ 0.05) but citric acid was lower (62-fold, p ≤ 0.008) in the dry season. Environmental conditions provoke metabolic responses in Hibiscus sabdariffa affecting constituent phytochemicals and nutritional value.

Original languageEnglish
Pages (from-to)164-168
Number of pages5
JournalFood Chemistry
Volume261
DOIs
Publication statusPublished - 30 Sep 2018
Externally publishedYes

Keywords

  • Anthocyanins
  • Hibiscus sabdariffa
  • Phytochemicals
  • Seasonal variation
  • α-Glucosidase inhibition

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