Antioxidant and Antimicrobial Activities of Leaves Crude Extracts of Lagerstroemia speciosa (L.) Pers


  • Arfan Aleemasa
  • Alif Khamel
  • On-Anong Somsap
  • Monthon Lertcanawanichakul
  • Gornganok Piboonpol คณะแพทยศาสตร์ มหาวิทยาลัยนราธิวาสราชนครินทร์


Lagerstroemia speciosa (L.) Pers, Antioxidant activity, Antimicrobial activity


Medicinal plants are one of the most significant natural sources of antioxidant capacity and antimicrobial agents. Lagerstroemia speciosa (L.) Pers is a medicinal plant that has various pharmacological activities and has been used for a long time in Southeast Asia. Therefore, the objectives of this research were to investigate antioxidant and antimicrobial activities of crude ethanolic extracts of Lagerstroemia speciosa (L.) Pers. leaves. Antioxidant activity was determined by DPPH assay method. The result showed that the IC50 of crude ethanolic extracts of Lagerstroemia speciosa (L.) Pers. leaves was 11.23 μg/ml. Antimicrobial activity was evaluated by agar well diffusion method. The result showed that it exhibited against gram-positive bacteria such as Micrococcus luteus TISTR884, Staphylococcus aureus TISTR517, Methicillin-resistant S. aureus 142 (MRSA142) and against gram-negative bacteria, Pseudomonas aeruginosa TISTR146. Moreover, it shown the highest activity against M. luteus TISTR884 with the inhibition zone as 28.30±0.060 mm.


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Aleemasa อ., Khamel อ., Somsap อ., Lertcanawanichakul ม., & Piboonpol ก. (2022). Antioxidant and Antimicrobial Activities of Leaves Crude Extracts of Lagerstroemia speciosa (L.) Pers. Princess of Naradhiwas University Journal, 14(2), 165–176. Retrieved from