title: [Metabolism of Rhizopus oryzae with xylose or glucose as carbon resource].
abstract: OBJECTIVE
  As one of the most abandon and cheapest recyclable bio-resources, cellulosic biomass appear to be the promising new energy if the two major components, glucose and xylose, are efficiently used.
  
  
  METHODS
  We compared the metabolism of Rhizopus oryzae growing on glucose or xylose. We measured biomass accumulation, intercellular metabolite contents, and organic acids production.
  
  
  RESULTS
  When cultured on xylose, the rate of bio-transformation reached 35.2% compared to 24.3% in the glucose. Intercellular contents accumulated much more by using xylose as sole carbon than using glucose. However, the quantity of organic acid was less with xylose than with glucose. In addition, during the coexistence of both substrates, Rhizopus oryzae utilizes glucose first, and xylose later when the glucose is almost exhausted.
  
  
  CONCLUSIONS
  With our data analysis, both the NADH/NAD + and ATP quantity are differed between the utilization of two carbon resources. In xylose, biological macromolecule and biomass accumulation are in advantage, while in glucose, the inorganic acid production is enhanced.
authors.affiliation: College of Biotechnology and Pharmaceutical Engineering, Nanjing University of Technology, Nanjing 210009, China. douchang2011@gmail.com
authors.forename: Chang
authors.initials: C
authors.lastname: Dou
authors.forename: Qing
authors.initials: Q
authors.lastname: Xu
authors.forename: Ping
authors.initials: P
authors.lastname: Song
authors.forename: Ling
authors.initials: L
authors.lastname: Jiang
authors.forename: Shuang
authors.initials: S
authors.lastname: Li
mesh_terms: D002244:Carbon / Q000378:metabolism*; D005947:Glucose / Q000378:metabolism*; D012233:Rhizopus / Q000378:metabolism; D014994:Xylose / Q000378:metabolism*
chemical_list: D002244:Carbon; D014994:Xylose; D005947:Glucose