Bioactive Compounds and Antimicrobial Activity in Plant Systems

Plants produce a wide spectrum of bioactive compounds, including alkaloids, flavonoids, terpenoids, phenolics and tannins, many of which display potent antimicrobial properties. These metabolites can disrupt microbial cell membranes, inhibit key enzymes, chelate metal ions and interfere with quorum sensing, thereby preventing growth or resistance development. Advanced analytical approaches such as high‐performance liquid chromatography, mass spectrometry and metabolomic profiling have accelerated identification and quantification of these compounds. Beyond their intrinsic activity, plant bioactives often act synergistically with conventional antibiotics, lowering effective doses and overcoming resistance in multidrug‐resistant pathogens. Research spans applications in human medicine, food preservation and veterinary care, with plant extracts formulated as topical agents, feed additives or packaging coatings. Emerging studies explore endophytic microorganisms as alternative sources of plant‐like antimicrobials, and genetic or elicitor‐based enhancement of biosynthetic pathways in cultivated species. The global rise of antimicrobial resistance fuels demand for novel agents with unique modes of action, positioning plant systems at the forefront of drug discovery and sustainable antimicrobial strategies.

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Bioactive Compounds and Antimicrobial Activity in Plant Systems publication trend

The graph below shows the total number of articles in bioactive compounds and antimicrobial activity in plant systems across all publications each year (not limited to Nature Index journals).

Technical terms

Bioactive compound: naturally occurring substance in plants that exerts specific biological effects, such as antimicrobial or antioxidant activity.

Tannins: high‐molecular‐weight polyphenols able to bind proteins or minerals, often responsible for plant defence and antimicrobial action.

Minimum inhibitory concentration (MIC): the lowest concentration of an antimicrobial agent that prevents visible growth of a microorganism in vitro.

Minimum bactericidal concentration (MBC): the lowest concentration of an antimicrobial agent required to kill a defined bacterial population.

Lag phase: initial adaptation period in bacterial growth during which cells acclimatise before entering exponential proliferation.

Antiadhesive activity: ability of a substance to inhibit initial microbial attachment to surfaces, reducing biofilm formation and colonisation.

References

1. The Effect of Growth Medium Strength on Minimum Inhibitory Concentrations of Tannins and Tannin Extracts against E. coli. Molecules (2020).
2. The Influence of Chestnut Extract and Its Components on Antibacterial Activity against Staphylococcus aureus. Plants (2023).
3. Antibacterial and Antibiotic Modifying Potential of Crude Extracts, Fractions, and Compounds from Acacia polyacantha Willd. against MDR Gram‐Negative Bacteria. Evidence-based Complementary and Alternative Medicine (2019).
4. Antimicrobial and antiadhesive activities of secondary metabolites against Bacillus cereus adhesion on PLA 3D printing material: ADMET Tox in silico, molecular docking and molecular dynamic analysis. Scientific African (2024).