title: Effects of light and temperature on open cultivation of desert cyanobacterium Microcoleus vaginatus.
abstract: Microalgae cultivation has recently been recognized as an important issue to deal with the increasingly prominent resource and environmental problems. In this study, desert cyanobacterium Microcoleus vaginatus was open cultivated in 4 different cultivation conditions in Qubqi Desert, and it was found Chlorella sp., Scenedesmus sp. and Navicula sp. were the main contaminating microalgal species during the cultivation. High light intensity alone was responsible for the green algae contamination, but the accompanied high temperature was beneficial to cyanobacterial growth, and the maximum biomass productivity acquired was 41.3mgL(-1)d(-1). Low temperature was more suitable for contaminating diatoms' growth, although all the microalgae (including the target and contaminating) are still demand for a degree of light intensity, at least average daily light intensity >5μEm(-2)s(-1). As a whole, cultivation time, conditions and their interaction had a significant impact on microalgal photosynthetic activity (Fv/Fm), biomass and exopolysaccharides content (P<0.001).
authors.affiliation: Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
authors.forename: Shubin
authors.initials: S
authors.lastname: Lan
authors.affiliation: School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China.
authors.forename: Li
authors.initials: L
authors.lastname: Wu
authors.affiliation: School of Sciences, Wuhan University of Technology, Wuhan 430070, China.
authors.forename: Delu
authors.initials: D
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China. Electronic address: cxhu@ihb.ac.cn.
authors.forename: Chunxiang
authors.initials: C
authors.lastname: Hu
mesh_terms: D018533:Biomass; D001709:Biotechnology / Q000379:methods; D002681:China; D002708:Chlorella / Q000254:growth & development; D000458:Cyanobacteria / Q000254:growth & development* / Q000502:physiology; D017377:Diatoms; D008027:Light; D010788:Photosynthesis; D044444:Scenedesmus / Q000254:growth & development; D013696:Temperature
keywords: Desert; Exopolysaccharides; Microalgae; Open cultivation; Photosynthesis