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Updated: Feb 12, 2026

Author Spotlight: Quantification of Aflatoxins and Phytoalexins in Peanut Seeds to Identify Genetic Resistance Against Aspergillus
Published on: April 19, 2024
Antibacterial potential of endophytic Streptomyces spp. isolated from peanut (Arachis hypogaea) roots:
Rehab M Mohamed1, Mohamed E El Awady2, Asmaa M Fahim3
1Department of Botany and Microbiology, Faculty of Science, Sohag University, Sohag, 82524, Egypt.
Abstract:
The worldwide escalation of antimicrobial resistance (AMR) necessitates the search for new bioactive agents from natural sources. Consequently, this study investigates the antimicrobial activity of endophytic Streptomyces spp. Eighteen Streptomyces isolates were recovered from sixteen peanut root samples using nitrate starch agar at 30 °C for 7 days. Among these, two strains, Streptomyces rochei RSA1 and Streptomyces sp. RSA2, exhibited significant antibacterial activity against both Gram-positive (Bacillus cereus and Staphylococcus aureus) and Gram-negative (Pseudomonas aeruginosa and Escherichia coli) bacteria, compared with six standard antibiotics. Nine metabolic bioactive compounds were identified using GC-MS. However, two compounds2-(butylthio) pyrimidine-4,6(1 H,5 H)-dione and 2,4-di-tert-butylphenol were particularly prominent (> 96% abundance). Functional groups were confirmed via FT-IR spectra. Molecular docking and dynamics simulations with relevant bacterial protein targets (PDB ID: 6FJH, 1O9G, 1J5E, and 9QT5) revealed strong hydrogen bonding and electrostatic interactions, with S. rochei RSA1 forming the most stable complex. Overall, peanut-derived endophytic Streptomyces represent promising sources of bioactive antibacterial metabolites for combating multidrug-resistant infections.
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