African Journal of
Biotechnology

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12193

Full Length Research Paper

Production of cellulases by Penicillium sp. in a solid-state fermentation of oil palm empty fruit bunch

Do-Myoung Kim
  • Do-Myoung Kim
  • GenDocs Inc., A-209, Migun Techno world 2, 533-1, Yongsan-dong, Yuseong-Gu, Daejon 305-500, Republic of Korea
  • Google Scholar
Eun Ji Cho
  • Eun Ji Cho
  • GenDocs Inc., A-209, Migun Techno world 2, 533-1, Yongsan-dong, Yuseong-Gu, Daejon 305-500, Republic of Korea
  • Google Scholar
Ji Won Kim
  • Ji Won Kim
  • GenDocs Inc., A-209, Migun Techno world 2, 533-1, Yongsan-dong, Yuseong-Gu, Daejon 305-500, Republic of Korea
  • Google Scholar
Yong-Woog Lee
  • Yong-Woog Lee
  • GenDocs Inc., A-209, Migun Techno world 2, 533-1, Yongsan-dong, Yuseong-Gu, Daejon 305-500, Republic of Korea
  • Google Scholar
Hwa-Jee Chung
  • Hwa-Jee Chung
  • GenDocs Inc., A-209, Migun Techno world 2, 533-1, Yongsan-dong, Yuseong-Gu, Daejon 305-500, Republic of Korea
  • Google Scholar


  •  Received: 04 December 2012
  •  Accepted: 18 December 2013
  •  Published: 01 January 2014

Abstract

To use oil palm empty fruit bunch (EFB) for cellulase production, a novel fungus was isolated from moistened EFB. This fungus was classified as Penicillium sp. by sequence analysis of the internal transcribing space and it was named Penicillium sp. GDX01. The Penicillium sp. strain secreted cellulases under solid-state fermentation of EFB. The fermentation conditions were optimized for maximal enzyme production. Of the different substrates tested, both EFB and rice straw gave the maximum production of filter paper activity (FPase). Five percent yeast extract and 40-50% initial moisture content were found to be optimal for enzyme production. In addition, the pretreatment of EFB with NaOH before fermentation inhibited the cellulase production of Penicillium sp. GDX01. Saccharification of pretreated EFB by cellulases from Penicillium sp. GDX01 resulted in a more than 80% release of glucose during a 72 h incubation, which is a better result than when using Celluclast 1.5L without the addition of β-glucosidase. Our results show that the cellulases produced by Penicillium sp. GDX01 are more efficient at the saccharification of EFB than Celluclast 1.5 L.

 

Key words: Cellulase, oil palm empty fruit bunch, solid-state fermentation, Penicillium.

Abbreviation

Abbreviations: SSF, Solid-state fermentation; SMF, submerged fermentation; EFB, empty fruit bunch; CMC, carboxymethylcellulose; PDA, potato dextrose agar; MEA, malt extract agar; ITS, internal transcribed spacer; PCR, polymerase chain reaction; DNS, 3, 5-dinitrosalicylic acid; CBase, β-glucosidase; CMCase, endo-glucanase; FPase, filter paper activity; BSA, bovine serum albumin; IMC, initial moisture content.