Phytochemical screening, total phenolics, and antioxidant and antibacterial activities of selected Philippine indigenous fruits

Issue Date

10-2020

Abstract

Nine Philippine indigenous fruits were screened for phytochemical constituents and assessed for total phenolics and antioxidant and antibacterial activities. Qualitative tests revealed the presence of alkaloids in Canarium ovatum, cardiac glycosides in Ficus pseudopalma and C. ovatum, and terpenoids in Antidesma bunius and C. ovatum. Total phenolics were highest in Garcinia binucao and Mangifera altissima with 758 and 694 mg gallic acid equivalent (GAE) / 100 g fresh matter (FM), respectively. The DPPH radical scavenging activities ranged from 82-516 mg ascorbic acid equivalent antioxidant activity (AEAC) /100 g FM, with M. altissima having the highest value and followed by Rubus rosifolius (513 mg AEAC / 100 g FM). Ferric reducing activities were highest for M. altissima and G. binucao with 111 mg and 121 mg ascorbic acid equivalents (AAE) / 100 g FM, respectively. Phenolic and flavonoid contents were strongly and positively correlated (P < 0.05). Moreover, phenolic contents may have significant contributions to the observed radical scavenging and ferric reducing activities based on their strong positive correlations (P < 0.05). For the antibacterial activities, extracts from Citrus hystrix and R. rosifolius were the most effective against Escherichia coli (MIC80 = 1.70 mg GAE/mL), while the F. pseudopalma extract was the most effective against Staphylococcus aureus (MIC80 = 0.56 mg GAE / mL). Present results showed that the selected indigenous fruits could be valuable sources of phytochemicals, such as phenolics and flavonoids, with potential antioxidant and antibacterial activities.

Source or Periodical Title

Philippine Journal of Science

ISSN

0031-7683

Volume

149

Issue

(3-a)

Page

697-710

Document Type

Article

Physical Description

illustrations; tables; references

Language

English

Subject

Antibacterial, Antioxidant, Phenolics, Philippine fruits, Phytochemicals

Digital Copy

yes

En – AGROVOC descriptors

ANTIBACTERIAL; ANTIOXIDANT; PHENOLICS; PHILIPPINE FRUITS; PHYTOCHEMICALS

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