Antibiofilm and antimicrobial activity studies of the essential oil, extract, and green synthesized silver nanoparticles from the leaves of Syzygium stocksii

Authors

  • B. S. Devika Department of Chemistry, Government College for Women, Thiruvananthapuram-695014, Kerala, India
  • J. Devi Department of Zoology, Government College for Women, Thiruvananthapuram-695014, Kerala, India
  • P. Biju Department of Botany, Government College Kasaragod, Kasaragod-671123, Kerala, India
  • Praveen Kumar Department of Zoology, Government College for Women, Thiruvananthapuram-695014, Kerala, India
  • P. S. Hema Department of Chemistry, HHMSPB NSS College for Women, Neeramankara, Thiruvananthapuram-695040, Kerala, India
  • G. Ajayakumar Department of Chemistry, Government College for Women, Thiruvananthapuram-695014, Kerala, India

DOI:

https://doi.org/10.25081/jp.2026.v18.9911

Keywords:

Syzygium stocksii, Ocimene, Silver nanoparticles, Antimicrobial activity, Antibiofilm activity

Abstract

This study investigates the phytochemical composition and biological potential of the leaves of Syzygium stocksii. For the first time, the presence of β-Ocimenes (E and Z isomers) was identified in the leaf extracts. The total phenolic and flavonoid contents were quantified, and the extracts demonstrated notable antioxidant activity. The ethanolic extract was further applied in the green synthesis of silver nanoparticles (AgNPs), which were evaluated for their antimicrobial and antibiofilm properties. Antimicrobial assays were performed against Acinetobacter baumannii, Pseudomonas aeruginosa, Bacillus cereus, Streptococcus mutans, and Candida albicans, revealing S. mutans and A. baumannii as the most sensitive to the essential oils. Importantly, the AgNPs exhibited strong antibiofilm activity against P. aeruginosa. These findings not only broaden the phytochemical profile of S. stocksii but also highlight its potential as a source of natural antioxidants, antimicrobials, and eco-friendly nanomaterials with promising biomedical applications.

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Published

2026-03-20

How to Cite

Devika, B. S., Devi, J., Biju, P., Kumar, P., Hema, P. S., & Ajayakumar, G. (2026). Antibiofilm and antimicrobial activity studies of the essential oil, extract, and green synthesized silver nanoparticles from the leaves of Syzygium stocksii. Journal of Phytology, 18, 14–24. https://doi.org/10.25081/jp.2026.v18.9911

Issue

Volume 18, 2026

Section

Articles

Copyright (c) 2026 B. S. Devika, J. Devi, P. Biju, Praveen Kumar, P. S. Hema, G. Ajayakumar

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This work is licensed under a Creative Commons Attribution 4.0 International License.