Enzyme-mediated dye degradation
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Abstract
Abstract
Abstract Native laccase production in polymorphic black yeasts is often limited by unstable cellular differentiation and insufficient metabolic coordination. Here, we developed a glucose–glycerol cofermentation strategy to improve laccase production in Aureobasidium melanogenum ZN by regulating cellular morphology and metabolism. The results showed that glycerol stabilized yeast-like growth and suppressed melanized differentiation, while the optimized combination of 2% glucose and 7.5% glycerol increased laccase activity and yield to 418.43 U·mL–1 and 65.67 U·g–1 dry weight (DW), respectively. The crude laccase showed an optimal activity at 75 °C and efficiently decolorized triphenylmethane dyes, especially malachite green, with partial activity retained under NaCl-containing and simulated wastewater-like conditions. Physiological and multiomics analyses linked glycerol-enhanced laccase production to yeast-like-state maintenance, carbon-source regulation, respiratory metabolism, redox adjustment, antioxidant responses, and reduced melanized differentiation. This study provides a morphology–metabolism-directed strategy for enhancing laccase production in native polymorphic fungi.
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@article{Zeng2026Glycerol,
title = {Glycerol StabilizesYeast-like Morphology and PromotesLaccase Biosynthesis through Metabolic Remodeling in Aureobasidium melanogenum ZN},
author = {Nan Zeng and Jiajia Long and Dandan Wang and Jiahe Pang and Chunji Li and Die Zhao and Ning Zhang and Bingxue Li},
journal = {Journal of Agricultural and Food Chemistry},
year = {2026},
doi = {10.1021/acs.jafc.6c07800},
url = {https://doi.org/10.1021/acs.jafc.6c07800}
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