ArticleFolia microbiologica2025
Mixed-species Pseudomonas biofilms: a novel and sustainable strategy for malachite green dye decolorization and detoxification.
Article in Folia microbiologica, 2025. 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
This study investigated the application of mixed biofilms formed by two Pseudomonas strains (NAA22 and NAA23) for bio-decolorization of malachite green (MG) dye. The isolated strains displayed biofilm formation and MG decolorization capabilities. Mixed biofilms exhibited significantly greater biofilm formation and MG decolorization (94.3%) compared to individual strains, suggesting synergistic interactions. This decolorization efficiency surpassed previously reported values for single strain decolorization. The mixed biofilms tolerated a broad range of temperatures (20-40 °C) and pH (5-9), with optimal decolorization at neutral or slightly acidic conditions (pH7.0). Enzyme analysis revealed laccase, NADH-DCIP reductase, and azoreductase as key contributors to MG decolorization, with significantly higher activity in mixed biofilms. Importantly, the bio-decolorization process transformed MG into non-phytotoxic compounds, demonstrated by seed germination and growth assays. These findings propose a promising and environmentally safe approach for MG bioremediation using mixed Pseudomonas biofilms.
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