Mycobiology.  2016 Mar;44(1):48-53. 10.5941/MYCO.2016.44.1.48.

Ethanol Production from Various Sugars and Cellulosic Biomass by White Rot Fungus Lenzites betulinus

• Im KH
• Nguyen TK
• Choi J
• Lee TS

• KMID: 2312859
• DOI: http://doi.org/10.5941/MYCO.2016.44.1.48

Abstract

Lenzites betulinus, known as gilled polypore belongs to Basidiomycota was isolated from fruiting body on broadleaf dead trees. It was found that the mycelia of white rot fungus Lenzites betulinus IUM 5468 produced ethanol from various sugars, including glucose, mannose, galactose, and cellobiose with a yield of 0.38, 0.26, 0.07, and 0.26 g of ethanol per gram of sugar consumed, respectively. This fungus relatively exhibited a good ethanol production from xylose at 0.26 g of ethanol per gram of sugar consumed. However, the ethanol conversion rate of arabinose was relatively low (at 0.07 g of ethanol per gram sugar). L. betulinus was capable of producing ethanol directly from rice straw and corn stalks at 0.22 g and 0.16 g of ethanol per gram of substrates, respectively, when this fungus was cultured in a basal medium containing 20 g/L rice straw or corn stalks. These results indicate that L. betulinus can produce ethanol efficiently from glucose, mannose, and cellobiose and produce ethanol very poorly from galactose and arabinose. Therefore, it is suggested that this fungus can ferment ethanol from various sugars and hydrolyze cellulosic materials to sugars and convert them to ethanol simultaneously.

Keyword

Cellulosic biomass; Ethanol; Lenzites betulinus; White rot fungus

MeSH Terms

Animals
Arabinose
Basidiomycota
Biomass*
Carbohydrates*
Cellobiose
Ethanol*
Fruit
Fungi*
Galactose
Gills
Glucose
Mannose
Trees
Xylose
Zea mays
Arabinose
Carbohydrates
Cellobiose
Ethanol
Galactose
Glucose
Mannose
Xylose