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Int. J. Mol. Sci. 2016, 17(9), 1429; doi:10.3390/ijms17091429

Impact of Phosphate, Potassium, Yeast Extract, and Trace Metals on Chitosan and Metabolite Production by Mucor indicus

1
Department of Chemical Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
2
Swedish Centre for Resource Recovery, University of Borås, Borås 50190, Sweden
*
Author to whom correspondence should be addressed.
Academic Editors: Hitoshi Sashiwa and Shinsuke Ifuku
Received: 21 July 2016 / Revised: 16 August 2016 / Accepted: 22 August 2016 / Published: 30 August 2016
(This article belongs to the Special Issue Chitins 2016)
View Full-Text   |   Download PDF [815 KB, uploaded 30 August 2016]   |  

Abstract

In this study the effects of phosphate, potassium, yeast extract, and trace metals on the growth of Mucor indicus and chitosan, chitin, and metabolite production by the fungus were investigated. Maximum yield of chitosan (0.32 g/g cell wall) was obtained in a phosphate-free medium. Reversely, cell growth and ethanol formation by the fungus were positively affected in the presence of phosphate. In a phosphate-free medium, the highest chitosan content (0.42 g/g cell wall) and cell growth (0.66 g/g sugar) were obtained at 2.5 g/L of KOH. Potassium concentration had no significant effect on ethanol and glycerol yields. The presence of trace metals significantly increased the chitosan yield at an optimal phosphate and potassium concentration (0.50 g/g cell wall). By contrast, production of ethanol by the fungus was negatively affected (0.33 g/g sugars). A remarkable increase in chitin and decrease in chitosan were observed in the absence of yeast extract and concentrations lower than 2 g/L. The maximum chitosan yield of 51% cell wall was obtained at 5 g/L of yeast extract when the medium contained no phosphate, 2.5 g/L KOH, and 1 mL/L trace metal solution. View Full-Text
Keywords: chitosan; ethanol; Mucor indicus; phosphate; potassium; trace metals; yeast extract chitosan; ethanol; Mucor indicus; phosphate; potassium; trace metals; yeast extract
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MDPI and ACS Style

Safaei, Z.; Karimi, K.; Zamani, A. Impact of Phosphate, Potassium, Yeast Extract, and Trace Metals on Chitosan and Metabolite Production by Mucor indicus. Int. J. Mol. Sci. 2016, 17, 1429.

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