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Simulated microgravity alters growth and microcystin production in Microcystis aeruginosa (cyanophyta)
Xiao, Yuan; Liu, Yongding; Wang, Gaohong; Hao, Zongjie; An, Yanjun; Liu, YD, Chinese Acad Sci, Inst Hydrobiol, State Key Lab Fresh Water Ecol & Biotechnol, 7 S Donghu Rd, Wuhan 430072, Hubei, Peoples R China
2010
Source PublicationTOXICON
ISSN0041-0101
Volume56Issue:1Pages:1-7
AbstractRecent researches indicated that microgravity can increase pathogenic bacteria virulence. We presumed that microgravity might affect the toxin production of toxic cyanobacteria too. Microcystis aeruginosa PCC7806 was chosen as the model organism to investigate the effects of simulated microgravity (SMG) on the growth and toxin production of toxic cyanobacteria. SMG could inhibit the growth of M. aeruginosa, which resulted in decreased cell number and lower specific growth rate after 20-day treatment. M. aeruginosa sensed the reduced gravity very quickly and immediately up-regulated its microcystin (MC) synthesis and exudation in 2 days. Subsequently, the intracellular MC content fell back since the 8(th) day and was stable around the initial level in the following days, suggesting a quick adaptation to the reduced gravity. SMG had negative effects on the photochemical system and the absorption of phosphorus in most time. However, the photosynthetic pigment concentrations and nitrogen absorption used to be transitorily stimulated upwards by SMG. It was assumed that SMG inhibited cell growth by interfering its photosynthesis and phosphorus uptake, while the enhanced MC production was related with pigment and nitrogen metabolisms. This study reveals that SMG is a novel environmental signal which inhibits growth and enhances MC production of M. aeruginosa. (C) 2010 Elsevier Ltd. All rights reserved.
KeywordSimulated Microgravity Microcystis Aeruginosa Microcystin Secondary Metabolism
Department[Xiao, Yuan; Liu, Yongding; Wang, Gaohong; Hao, Zongjie; An, Yanjun] Chinese Acad Sci, Inst Hydrobiol, State Key Lab Fresh Water Ecol & Biotechnol, Wuhan 430072, Hubei, Peoples R China; [Xiao, Yuan; Hao, Zongjie; An, Yanjun] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
Subject AreaPharmacology & Pharmacy ; Toxicology
Funding OrganizationChinese Manned Space Flight Project ; Natural Science Foundation of China [30970688] ; Chinese Manned Space Flight Project ; Natural Science Foundation of China [30970688] ; Chinese Manned Space Flight Project ; Natural Science Foundation of China [30970688] ; Chinese Manned Space Flight Project ; Natural Science Foundation of China [30970688]
Indexed BySCI
Language英语
WOS IDWOS:000278205500001
Funding OrganizationChinese Manned Space Flight Project ; Natural Science Foundation of China [30970688] ; Chinese Manned Space Flight Project ; Natural Science Foundation of China [30970688] ; Chinese Manned Space Flight Project ; Natural Science Foundation of China [30970688] ; Chinese Manned Space Flight Project ; Natural Science Foundation of China [30970688]
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Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/13703
Collection水环境工程研究中心_期刊论文
Corresponding AuthorLiu, YD, Chinese Acad Sci, Inst Hydrobiol, State Key Lab Fresh Water Ecol & Biotechnol, 7 S Donghu Rd, Wuhan 430072, Hubei, Peoples R China
Recommended Citation
GB/T 7714
Xiao, Yuan,Liu, Yongding,Wang, Gaohong,et al. Simulated microgravity alters growth and microcystin production in Microcystis aeruginosa (cyanophyta)[J]. TOXICON,2010,56(1):1-7.
APA Xiao, Yuan,Liu, Yongding,Wang, Gaohong,Hao, Zongjie,An, Yanjun,&Liu, YD, Chinese Acad Sci, Inst Hydrobiol, State Key Lab Fresh Water Ecol & Biotechnol, 7 S Donghu Rd, Wuhan 430072, Hubei, Peoples R China.(2010).Simulated microgravity alters growth and microcystin production in Microcystis aeruginosa (cyanophyta).TOXICON,56(1),1-7.
MLA Xiao, Yuan,et al."Simulated microgravity alters growth and microcystin production in Microcystis aeruginosa (cyanophyta)".TOXICON 56.1(2010):1-7.
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