title: Cost-effective lignocellulolytic enzyme production by Trichoderma reesei on a cane molasses medium.
abstract: BACKGROUND
  Cane molasses, an important residue of the sugar industry, have the potential as a cost-effective carbon source that could serve as nutrients for industrial enzyme-producing microorganisms, especially filamentous fungi. However, the enzyme mixtures produced in such a complex medium are poorly characterized. In this study, the secretome of Trichoderma reesei grown on a cane molasses medium (CMM) as well as on a lactose-based conventional medium (LCM) were compared and analyzed by using proteomics.
  
  
  RESULTS
  In this study we show that both the CMM and LCM can serve as excellent growth media for T. reesei. The enzyme expression patterns in the two media were similar and a considerable number of the identified proteins on two-dimensional gel electrophoresis (2-DE) gels were those involved in biomass degradation. The most abundant cellulolytic enzymes identified in both media were cellobiohydrolases (Cel7A/Cel6A) and endoglucanases (Cel7A/Cel5A) and were found to be more abundant in CMM. We also found that both media can serve as an inducer of xylanolytic enzymes. The main xylanases (XYNI/XYNIV) and xyloglucanase (Cel74A) were found at higher concentrations in the CMM than LCM.
  
  
  CONCLUSIONS
  We analyzed the prevalent proteins secreted by T. reesei in the CMM and LCM. Here, we show that hydrolytic enzymes are cost-effective and can be produced on cane molasses as a carbon source which can be used to digest lignocellulolytic biomass.
authors.affiliation: Institute of Animal Nutrition, Sichuan Agricultural University, Ya'an, Sichuan 625014, People's Republic of China.
authors.forename: Jun
authors.initials: J
authors.lastname: He
authors.affiliation: College of Forestry, South China Agricultural University, Guangzhou 510642, People's Republic of China.
authors.forename: Ai-Min
authors.initials: AM
authors.lastname: Wu
authors.affiliation: Institute of Animal Nutrition, Sichuan Agricultural University, Ya'an, Sichuan 625014, People's Republic of China.
authors.forename: Daiwen
authors.initials: D
authors.lastname: Chen
authors.affiliation: Institute of Animal Nutrition, Sichuan Agricultural University, Ya'an, Sichuan 625014, People's Republic of China.
authors.forename: Bing
authors.initials: B
authors.lastname: Yu
authors.affiliation: Institute of Animal Nutrition, Sichuan Agricultural University, Ya'an, Sichuan 625014, People's Republic of China.
authors.forename: Xiangbing
authors.initials: X
authors.lastname: Mao
authors.affiliation: Institute of Animal Nutrition, Sichuan Agricultural University, Ya'an, Sichuan 625014, People's Republic of China.
authors.forename: Ping
authors.initials: P
authors.lastname: Zheng
authors.affiliation: Institute of Animal Nutrition, Sichuan Agricultural University, Ya'an, Sichuan 625014, People's Republic of China.
authors.forename: Jie
authors.initials: J
authors.lastname: Yu
authors.affiliation: Institute of Animal Nutrition, Sichuan Agricultural University, Ya'an, Sichuan 625014, People's Republic of China.
authors.forename: Gang
authors.initials: G
authors.lastname: Tian
keywords: Cane molasses; Carbon source; Enzyme; Proteomics; Trichoderma reesei