Biotechnological Strategies for Chitosan Production by Mucoralean Strains and Dimorphism Using Renewable Substrates

• Published in: International journal of molecular sciences 2020-06, Vol.21 (12), p.4286
• Main Authors: de Souza, Adriana Ferreira, Galindo, Hugo Marques, de Lima, Marcos Antônio Barbosa, Ribeaux, Daylin Rubio, Rodríguez, Dayana Montero, da Silva Andrade, Rosileide Fontenele, Gusmão, Norma Buarque, de Campos-Takaki, Galba Maria
• Format: Article
• Language: English
• Subjects: Acetylation; Antimicrobial agents; Biocompatibility; Biomass; Carbon; Carbon - metabolism; Carbon sources; Cassava; Chitosan; Chitosan - metabolism; Crustaceans; Deacetylation; Dimorphism; Factorial design; Fungi; Industrial wastes; Liquor; Manihot - chemistry; Morphology; Mucor - growth & development; Mucor - metabolism; Mucorales - growth & development; Mucorales - metabolism; Nitrogen; Nitrogen - metabolism; Nitrogen sources; Spectroscopy, Fourier Transform Infrared; Statistical analysis; Waste Water - chemistry; Wastewater; Zea mays - chemistry
• ISSN: 1422-0067; 1661-6596; 1422-0067
• DOI: 10.3390/ijms21124286

We investigated the influence of corn steep liquor (CSL) and cassava waste water (CWW) as carbon and nitrogen sources on the morphology and production of biomass and chitosan by UCP 1262 and UCP 1266. The highest biomass yields of 4.832 g/L ( UCP 1262) and 6.345 g/L ( UCP 1266) were produced in assay 2 (6% CSL and 4% CWW), factorial design 2 , and also favored higher chitosan production (32.471 mg/g) for . The highest chitosan production (44.91 mg/g) by (UCP 1266) was obtained at the central point (4% of CWW and 6% of CSL). The statistical analysis, the higher concentration of CSL, and lower concentration of CWW significantly contributed to the growth of the strains. The FTIR bands confirmed the deacetylation degree of 80.29% and 83.61% of the chitosan produced by (UCP 1262) and (UCP 1266), respectively. (UCP 1262) showed dimorphism in assay 4-6% CSL and 8% CWW and central point. (UCP 1266) was optimized using a central composite rotational design, and the highest yield of chitosan (63.18 mg/g) was obtained in medium containing 8.82% CSL and 7% CWW. The experimental data suggest that the use of CSL and CWW is a promising association to chitosan production.