Antioxidant and antibacterial response of hydroalcoholic extract of Plumeria alba leaves

Siang, Chon Chee; Suryadevara, Nagaraja; Selvaraj, Chandrasekaran; Appalaraju, V. V. S. S.; Kumārī, Ushā; Bajaj, Sakshi

doi:10.53730/ijhs.v6ns1.8703

Cited by 1 publication

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“…Some reports have shown that essential oils possess antioxidant activity, which plays a vital role in neutralizing free radicals and benefiting human health [ 29 , 30 , 33 ]. The antioxidant evaluation of the organic solvent leaf extract of P. alba by Siang and et al revealed moderate antioxidant activity in the DPPH assay, where the IC 50 was found to be 23.96 mg/mL [ 34 ]. Essential oils are therefore better radical scavengers than the organic solvent extracts of the same plant.…”

Section: Resultsmentioning

confidence: 99%

Chemical Characterization, Antioxidant, Antimicrobial, and Antibiofilm Activities of Essential Oils of Plumeria alba (Forget-Me-Not)

Mamattah

Adomako

Mensah

et al. 2023

Biochemistry Research International

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Essential oils are known to possess many biological properties such as antimicrobial and antioxidant activities. Plumeria alba flowers are used in traditional remedies for diarrhea, cough, fever, and asthma treatment. This work evaluated the chemical composition and the biological activities of essential oils obtained from the flowers and leaves of Plumeria alba. The essential oils were extracted using the Clevenger-type apparatus and characterized using GC-MS. In the flower essential oil, a total of 17 compounds were identified, with linalool (23.91%), α-terpineol (10.97%), geraniol (10.47%), and phenyl ethyl alcohol (8.65%) being abundant. In the leaf essential oil, a total of 24 compounds were identified, with benzofuran, 2,3-di, hydro-(3.24%), and muurolol (1.40%) being present. Antioxidant activities were assessed using hydrogen peroxide scavenging, phosphomolybdenum, and 2, 2-diphenyl-1-picrylhydrazyl (DPPH) free radical-scavenging assays. Antimicrobial activities were assessed through a microdilution assay. The essential oil showed antimicrobial activity against test microorganisms with minimum inhibitory concentrations ranging from 25.0 to 50.0 mg/mL. Biofilm inhibition ranged from 27.14 ± 1.0 to 58.99 ± 0.6 mg/mL. The essential oil exhibited total antioxidant capacities which ranged from 17.5 μg/g AAE to 83 μg/g AAE in the phosphomolybdenum assay. The IC50 values in the DPPH and hydrogen peroxide radical scavenging assays for both flowers and leaves ranged from 18.66 μg/mL to 38.28 μg/mL. Both essential oils also displayed good antibiofilm activities, with the concentration required for half-maximal inhibition of biofilm formation being ∼60 mg/mL for both oils. This study shows that essential oils of Plumeria alba possess good antioxidant and antimicrobial activities and could be used as a source of natural antioxidants and antimicrobial agents.

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