ArticlePest management science2026
Multilayer microcapsules improved the tolerance to adverse conditions of Pseudomonas aeruginosa A14 and biocontrol effect against cabbage Fusarium wilt.
Article in Pest management science, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundFusarium wilt is a major soil-borne disease that restricts cabbage production and causes substantial agricultural losses. Although biocontrol microorganisms are considered promising alternatives to synthetic fungicides, their field performance is often limited by poor tolerance to adverse environmental and processing conditions. In this study, we developed a multilayer encapsulation strategy to improve the stability and biocontrol effectiveness of a selected antagonistic bacterial strain.
resultsA bacterial isolate, designated A14, exhibited broad-spectrum antimicrobial activity and was identified as Pseudomonas aeruginosa through polyphasic taxonomic analysis. The fermentation-derived extract suppressed the mycelial growth of Fusarium oxysporum f. sp. conglutinans (FOC), which is likely to be via disrupting the integrity of the cell wall and membrane. Chemical analysis by high-performance liquid chromatography-mass spectrometry (HPLC-MS) identified phenazine-1-carboxamide (PCN) as one of the antifungal metabolites present in the extract, and purified PCN also showed inhibitory activity against FOC. To improve strain performance under stress, A14 was encapsulated using a layer-by-layer (LBL) assembly system based on sodium alginate (SA), hyaluronic acid (HA) and gelatin (GL). The resulting multilayer microcapsules significantly improved tolerance to heat, acidic conditions and salt stress, while also enhancing antioxidant activity.
conclusionThese multilayer microcapsules can effectively enhance the tolerance of strain A14 to high temperature, acidic environments and high salt stress. Additionally, encapsulation markedly improved the antioxidant capacity of A14. Meanwhile, these multilayer microcapsules enhanced the biological control efficiency against cabbage Fusarium wilt. These findings provide useful support for the development of highly efficient bacterial bioformulations. © 2026 Society of Chemical Industry.
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