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Pigment production by a newly isolated strain Pycnoporus sanguineus SYBC-L7 in solid-state fermentation

Summary

Researchers isolated a fungal strain that produces bright orange natural pigments through fermentation on wood chips and other agricultural waste. By optimizing growing conditions such as pH and moisture, they achieved high pigment yields with antibacterial properties. The pigments identified in this study showed effectiveness against harmful bacteria and could replace synthetic dyes in food, cosmetics, and textile products.

Background

Natural pigments derived from microorganisms offer advantages over synthetic pigments due to their biodegradability and lack of side effects. Pycnoporus genus is listed as a food- and cosmetic-grade microorganism known for producing natural pigments with antiviral, antibacterial, and anti-inflammatory properties. This study focuses on optimizing pigment production from a newly isolated Pycnoporus sanguineus strain using agro-industrial wastes.

Objective

This study aimed to isolate and identify a Pycnoporus fungal strain with high-yield pigment production capacity, optimize culture conditions for pigment production using agro-industrial wastes, identify pigment components, and evaluate antimicrobial activity of the produced pigments.

Results

Strain SYBC-L7 was identified as Pycnoporus sanguineus and rapidly produced intense orange pigments when cultured on wood chips substrate. Optimal production conditions were glucose as carbon source, ammonium tartrate as nitrogen source, initial pH 6.0, and 65% relative humidity. Three pigment components were identified: cinnabarinic acid, tramesanguin, and 2-amino-9-formylphenoxazone-1-carbonic acid, with significant antibacterial activity against Gram-positive bacteria.

Conclusion

Pycnoporus sanguineus SYBC-L7 effectively produces natural orange pigments with antibacterial properties through cost-effective solid-state fermentation using wood chips. The optimized culture conditions and use of agro-industrial waste substrates provide a basis for large-scale production and application of natural pigments in food, cosmetics, and textile industries.
  • Published in:Frontiers in Microbiology,
  • Study Type:Experimental Research,
  • Source: PMID: 36338084, DOI: 10.3389/fmicb.2022.1015913
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