Factors affecting N2 fixation by the cyanobacterium Trichodesmium sp. GBRTRLI101

Fu, FX and Bell, PRF (2003) Factors affecting N2 fixation by the cyanobacterium Trichodesmium sp. GBRTRLI101. Fems Microbiology Ecology, 45 2: 203-209. doi:10.1016/S0168-6496(03)00157-0

Author Fu, FX
Bell, PRF
Title Factors affecting N2 fixation by the cyanobacterium Trichodesmium sp. GBRTRLI101
Journal name Fems Microbiology Ecology   Check publisher's open access policy
ISSN 0168-6196
Publication date 2003
Sub-type Article (original research)
DOI 10.1016/S0168-6496(03)00157-0
Volume 45
Issue 2
Start page 203
End page 209
Total pages 7
Place of publication Amsterdam, Netherlands
Publisher Elsevier Science BV
Collection year 2003
Language eng
Subject C1
291199 Environmental Engineering not elsewhere classified
769999 Other Environmental aspects
Abstract Various factors affecting N-2 fixation of a cultured strain of Trichodesmium sp. (GBRTRLI101) from the Great Barrier Reef Lagoon were investigated. The diurnal pattern of N2 fixation demonstrated that it was primarily light-induced although fixation continued to occur for at least 1 h in the dark in samples that had been actively fixing N-2. N-2 fixation was dependent on the light intensity and stimulated more by white light when compared with blue, green, yellow and red light whereas rates of N-2 fixation decreased most under red light. Inorganic phosphorous concentrations in the lower range of treatments up to 1.2 muM significantly stimulated N-2 fixation and further additions promoted little or no increase in N-2 fixation. Organic phosphorous (Na-glycerophosphate) also stimulated N-2 fixation rates. Added combined nitrogen (NH4+, NO3-, urea) of 10 muM did not inhibit N-2 fixation in short-term studies (first generation), however it was depressed in the long-term studies (fifth generation). (C) 2003 Federation of European Microbiological Societies. Published by Elsevier Science B.V. All rights reserved.
Keyword Microbiology
N-2 Fixation
Combined Nitrogen
Marine Nitrogen-fixation
Extensive Bloom
Diel Variation
Light Quality
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
2004 Higher Education Research Data Collection
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Citation counts: TR Web of Science Citation Count  Cited 29 times in Thomson Reuters Web of Science Article | Citations
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Created: Wed, 15 Aug 2007, 02:17:58 EST