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Plant Science Today (PST)

Research Articles

Early Access

Comparative evaluation of antimicrobial activity of Solanum torvum plant extracts against Ralstonia solanacerum

DOI
https://doi.org/10.14719/pst.8424
Submitted
21 March 2025
Published
15-12-2025

Abstract

Ralstonia solanacearum is a major bacterial pathogen that causes wilt disease, leading to yield losses of up to 90 % in solanaceous crops such tomato (Solanum lycopersicum), brinjal (S. melongena), potato (S. tuberosum), chili (Capsicum annuum). This study investigated the antibacterial potential of Solanum torvum (S. torvum) plant extracts against this pathogen. Extracts from the root, stem and fruit were evaluated for their antimicrobial activity. Gas chromatography-mass spectrometry (GC-MS) analysis of the root extract revealed several bioactive compounds, including Oxirane, Decon-1-ol, 1-Cyclo Azopropyl and Pentadecanoic acid, which confirm its antimicrobial effects. The minimum inhibitory concentrations (MIC) of the root and leaf extracts ranged from 7.5 mg/mL to 10 mg/mL, indicating strong antibacterial activity. The root extract also demonstrated a lethal time (LT50) of 6.6 hr, confirming its effectiveness against R. solanacearum. Furthermore, the extract exhibited biofilm-inhibitory activity, with an IC50 value of 37.03 mg/mL, suggesting its ability to prevent bacterial colonization and biofilm formation.

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