Induction of pigment production through media composition, abiotic and biotic factors in two filamentous fungi

ABSTRACT: In addition to plant-derived, fungal pigments have become an alternative in respect to synthetic ones. Besides Monascus sp., several pigment-producing fungi do not have culture conditions well-established yet. In this research, media composition, light wavelength and co-culture were evaluated, results were reported in Absorbance Units per gram of biomass (AU/Bgr). For Fusarium oxysporum a C:N ratio above 7 was advantageous, using both complex and defined media; blue LED light increased the AU/Bgr value from 18013 to 344; co-culture did not enhance pigment production. In Aspergillus chevalieri a high C:N ratio with glucose as carbon source was ideal. When exposing cultures to light, UV and red light gave the highest pigmentation; moreover, differential UV-VIS spectra in all wavelengths suggested production of additional pigments. Particularly a pigment observed when cultured in green light was also found in co- culture with yeast and there was an improvement of AU/Bgr value of 52549%. This is the first report regarding light effect and co-culture for these fungi, as well as C:N ratio for A. chevalieri.

• Autores: Palacio Barrera, Ana María; Areiza Restrepo, Daniel Emilio; Zapata Ocampo, Paola Andrea; Atehortúa Garcés, Lucía; Correa, Cristian; Peñuela Vásquez, Mariana
• Tipo de recurso: Article of investigation
• Fecha de publicación: 2019
• Institución: Universidad de Antioquia
• Repositorio: Repositorio UdeA
• Idioma: eng
• OAI Identifier: oai:bibliotecadigital.udea.edu.co:10495/35261
• Acceso en línea: https://hdl.handle.net/10495/35261
• Palabra clave: Hongos; Fungi; Pigmentos Biológicos; Pigments, Biological; Luz led; LED light; AU/Bgr, (absorbance units per gram of biomass)
• Rights: openAccess
• License: https://creativecommons.org/licenses/by-nc-nd/4.0/