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Research Article Open access CC BY 4.0

Preliminary In-vitro Assessment of Some Phytochemical Constituents and Radical Scavenging Activity of Methanol Extracts of Five Flowers Varieties

Ogugua N. Victor, Anaduaka G. Emeka, Agba J. Chukwuka, Apeh O. Victor, Egba I. Simeon, Agu C. Victor, Ogbu N. Patience

Annual Research & Review in Biology · pp. 357–365 · Published 22 Oct 2014

10.9734/ARRB/2015/11188

Abstract

This work evaluated some phytochemical constituents and radical scavenging activity of the flower samples of Allamanda carthica, Delonix regia, Hibiscus rosasinensis, Plumeria rubra and Tercoma stans. Methanol extracts of different flower samples were used for the phytochemical analysis. The result obtained showed that Tercoma stans has the highest yield (14.45%) followed by Hibiscus rosasinensis (12.36%), Delonix regia(11.36%), Allamanda Cathartica (10.11%) and Plumeria rubra (8.99%) while the preliminary qualitative phytochemical screening showed that alkaloid was absent in all the extracts. The methanol extracts of the five flower samples indicated the presence of flavonoids and saponins in significant quantities. With the exception of Allamanda Cathartica and Delonix regia all other extracts dictates the presence of protein. Glycosides were not detected in Allamanda carthica and Tercoma stans, but were found in other samples. Tannins were detected in small quantities in the five flower samples. Methanol extract of Allamanda Cathartica, Delonix regia, Hibiscus rosasinensis, Plumeria rubra and Tercoma stans were prepared for the assessment of the antioxidant scavenging properties using the DPPH model and ascorbic acid as standard. The result obtained from the antioxidant activity was used to plot a graph of absorbance against time. The ascorbic acid standard showed the highest activity at 0.8 mg/dl. The methanol extracts of the flower samples showed varying degree of antioxidant activity in the decreasing order, as follows: Plumeria rubra>Tercoma stans>Allamanda Cathartica>Hibiscus rosasinensis>Delonix regia. The result suggests that the phytochemical and antioxidant properties of the flowers could be used for medicinal purposes since some insects and birds depend on the nectar produced from these flowers for survival.

Allamanda cathartica Delonix regia Hibiscus rosasinensis Plumeria rubra Tercoma stans phytochemicals radical scavenging.

References (21)

  1. 1 Free radicals and antioxidants in normal physiological functions and human disease [DOI]
  2. 2 Phytochemical Methods: A Guide to Modern Techniques of Plant Analysis
  3. 3 Phytochemical constituents of some Nigerian medicinal plants [DOI]
  4. 4 Antioxidant activity of Nigella sativa essential oil [DOI]
  5. 5 Property Distributions: Differences between Drugs, Natural Products, and Molecules from Combinatorial Chemistry [DOI]
  6. 6 Lipid peroxidation: Mechanisms, inhibition, and biological effects [DOI]
  7. 7 The Fenton reagents [DOI]
  8. 8 Screening of hundred Rwandese medicinal plants for antimicrobial and antiviral properties [DOI]
  9. 9 The Antioxidants and Pro-Antioxidants Network: An Overview [DOI]
  10. 10 Traditional medicine development for medical and dental primary health care delivery system in Africa [DOI]
  11. 11 The centennial of the Fenton reaction [DOI]
  12. 12 In vitro antibacterial activity of the crude methanol extract of Woodfordia fruticosa Kurz. flower (Lythraceae) [DOI]
  13. 13 Antioxidant action of Tinospora cordifolia root extract in alloxan diabetic rats [DOI]
  14. 14 Reactive Oxygen Species, Cancer and Anti-Cancer Therapies [DOI]
  15. 15 Alkaloids - Secrets of Life [DOI]
  16. 16 Preliminary study of the antioxidant properties of flowers and roots of Pyrostegia venusta (Ker Gawl) Miers [DOI]
  17. 17 Isolation and pharmacological activities of the Tecoma stans alkaloids [DOI]
  18. 18 Bioactive Iridoids and a New Lignan from Allamanda cathartica and Himatanthus fallax from the Suriname Rainforest [DOI]
  19. 19 Plumieride from Allamanda cathartica as an antidermatophytic agent [DOI]
  20. 20 Radical Scavenging, Reducing Power, Lipid Peroxidation Inhibition and Chelating Properties of Extracts from Artemisia campestris L. Aerial Parts [DOI]
  21. 21 Seeds of Puerto Rican Trees and Shrubs: Second Installment [DOI]

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