Antibacterial activity of ethyl acetate extract from Parkia speciosa Pericarp against selected bacteria

Nur Dayana Hassan Cheong, . and Norfarah Izzaty Razaly, . and Emida Mohamed, . and Azlin Sham Rambely, . and Horhisham Haron, . and Siti Nazrina Camalxaman, . (2023) Antibacterial activity of ethyl acetate extract from Parkia speciosa Pericarp against selected bacteria. Journal of Sustainability Science and Management (Malaysia), 18 (12). pp. 12-19. ISSN 2672-7226

Parkia speciosa or petai is commonly found in tropical countries such as Thailand, Indonesia, and Malaysia. This plant is usually eaten raw or included in recipes and it is believed that P. speciosa can relieve various illnesses. Previous studies have proven that P. speciosa has some valuable medicinal properties such as a hypoglycemic agent, antitumor, and antimutagenicity. Usually, only the seeds of P. speciosa are consumed while their pericarp is discarded. Thus, in this study, we evaluate the pericarp’s potential to be utilised as an antimicrobial agent. The pericarp was extracted using ethyl acetate and the antibacterial activity of the extract was determined by disk diffusion and broth dilution methods against four types of common infectious bacteria: Staphylococcus aureus, Bacillus cereus, Escherichia coli, and Salmonella typhimurium. It was found that the P. Speciosa pericarp extract exhibited good antibacterial activity toward S. aureus and B. cereus while E. coli and S. typhimurium were resistant to the extract. The lowest concentration of extract that has an effect on S. aureus and B. cereus was 7.81 mg/mL and 1.95 mg/mL, respectively. Thus, the extract may have the potential to be used as a potent antimicrobial agent.

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Abstract

Parkia speciosa or petai is commonly found in tropical countries such as Thailand, Indonesia, and Malaysia. This plant is usually eaten raw or included in recipes and it is believed that P. speciosa can relieve various illnesses. Previous studies have proven that P. speciosa has some valuable medicinal properties such as a hypoglycemic agent, antitumor, and antimutagenicity. Usually, only the seeds of P. speciosa are consumed while their pericarp is discarded. Thus, in this study, we evaluate the pericarp’s potential to be utilised as an antimicrobial agent. The pericarp was extracted using ethyl acetate and the antibacterial activity of the extract was determined by disk diffusion and broth dilution methods against four types of common infectious bacteria: Staphylococcus aureus, Bacillus cereus, Escherichia coli, and Salmonella typhimurium. It was found that the P. Speciosa pericarp extract exhibited good antibacterial activity toward S. aureus and B. cereus while E. coli and S. typhimurium were resistant to the extract. The lowest concentration of extract that has an effect on S. aureus and B. cereus was 7.81 mg/mL and 1.95 mg/mL, respectively. Thus, the extract may have the potential to be used as a potent antimicrobial agent.

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Item Type:	Article
AGROVOC Term:	Parkia
AGROVOC Term:	pericarp
AGROVOC Term:	plant extracts
AGROVOC Term:	antibacterial plants
AGROVOC Term:	diffusion
AGROVOC Term:	reduction
AGROVOC Term:	ethanol
AGROVOC Term:	antimicrobials
Geographical Term:	Malaysia
Depositing User:	Mr. Khoirul Asrimi Md Nor
Date Deposited:	28 Oct 2025 10:58
Last Modified:	28 Oct 2025 10:58
URI:	http://webagris.upm.edu.my/id/eprint/2168

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