Mycobiology.  2005 Jun;33(2):90-96.

Bioconversion of Straw Into Improved Fodder: Mycoprotein Production and Cellulolytic Acivity of Rice Straw Decomposing Fungi

• Helal GA

Abstract

Sixty two out of the sixty four species of fungal isolates tested could produce both exo-beta1,4-gluconase (C1) and endo-beta1,4-gluconase (Cx) on pure cellulose and rice straw as carbon source in Czapek's medium. Fifty-eight and fifteen species were able to grow at 25degrees C and at 45degrees C, respectively. Eleven species could grow at both 25degrees C and 45degrees C while, four species appeared only at 45degrees C. The most cellulolytic species at 25degrees C was Trichoderma koningii producing 1.164 C1 (mg glucose/1 ml culture filtrate/1 hr) and 2.690 Cx on pure cellulose, and 0.889 C1 and 1.810 Cx on rice straw, respectively. At 45degrees C, the most active thermotolerant species were Aspergillus terreus, followed by A. fumigatus. Talaromyces thermophilus was the highest active thermophilic species followed by Malbranchea sulfurea. Most of these species were also active in fermentation of rice straw at 25 and 45degrees C (P<0.05). The most active ones were T. koningii, A. ochraceus and A. terreus, which produced 201.5, 193.1 and 188.1 mg crude protein/g dry straw, respectively.

Keyword

Bioconversion; Cellulases; Decomposition; Fodder; Mycoprotein; Rice straw

MeSH Terms

Aspergillus
Carbon
Cellulases
Cellulose
Fermentation
Fungi*
Talaromyces
Trichoderma
Carbon
Cellulases
Cellulose