title: Utilization of xylose as a carbon source for mixotrophic growth of Scenedesmus obliquus.
abstract: Mixotrophic cultivation is one potential mode for microalgae production, and an economically acceptable and environmentally sustainable organic carbon source is essential. The potential use of xylose for culturing Scenedesmus obliquus in a mixotrophic mode and physiological features of xylose-grown S. obliquus were studied. S. obliquus had a certain xylose tolerance, and was capable of utilizing xylose for growth. At a xylose concentration of 4gL(-1), the maximal cell density was 2.2gL(-1), being 2.9-fold of that under photoautotrophic condition and arriving to the level of mixotrophic growth using 4gL(-1) glucose. No changes in cellular morphology of the cells grown with or without xylose were detected. Fluorescence emission from photosystem II (PS II) relative to photosystem I (PS I) was decreased in mixotrophic cells, implying that the PSII activity was decreased. The biomass lipid content was enhanced and carbohydrate concentration was decreased, in relation to photoautotrophic controls.
authors.affiliation: Beijing Radiation Center, Beijing Academy of Science and Technology, Beijing 100015, PR China. Electronic address: yangcicely@126.com.
authors.forename: Suling
authors.initials: S
authors.lastname: Yang
authors.affiliation: Beijing Radiation Center, Beijing Academy of Science and Technology, Beijing 100015, PR China.
authors.forename: Guijun
authors.initials: G
authors.lastname: Liu
authors.affiliation: Beijing Radiation Center, Beijing Academy of Science and Technology, Beijing 100015, PR China.
authors.forename: Youting
authors.initials: Y
authors.lastname: Meng
authors.affiliation: Beijing Radiation Center, Beijing Academy of Science and Technology, Beijing 100015, PR China.
authors.forename: Ping
authors.initials: P
authors.lastname: Wang
authors.affiliation: Beijing Radiation Center, Beijing Academy of Science and Technology, Beijing 100015, PR China.
authors.forename: Sijing
authors.initials: S
authors.lastname: Zhou
authors.affiliation: Beijing Radiation Center, Beijing Academy of Science and Technology, Beijing 100015, PR China.
authors.forename: Hongzhong
authors.initials: H
authors.lastname: Shang
mesh_terms: D000449:Aldehyde Reductase / Q000378:metabolism; D018533:Biomass; D005453:Fluorescence; D010860:Pigments, Biological / Q000032:analysis; D044444:Scenedesmus / Q000737:chemistry / Q000166:cytology / Q000502:physiology*; D014994:Xylose / Q000378:metabolism*
chemical_list: D010860:Pigments, Biological; D014994:Xylose; D000449:Aldehyde Reductase
keywords: Bioenergy; Mixotrophic growth; Scenedesmus obliquus; Xylose