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- Title
Growth, N<sub>2</sub> fixation and photosynthesis in a cyanobacterium, Trichodesmium sp., under Fe stress.
- Authors
Fei-xue Fu; Bell, P. R. F.
- Abstract
Trichodesmium sp., isolated from the Great Barrier Reef lagoon, was cultured in artificial seawater media containing a range of Fe concentration. Fe additions stimulated growth, N2 fixation, cellular chlorophyll a content, light-saturated chlorophyll a-specific gross photosynthetic capacity (Pmchl a) and the dark respiration rate (Rdchl a). Cell yields only doubled for 9 nM Fe relative to zero added Fe, whereas N2 fixation increased 11-fold considerably for 450 nM Fe. The results suggest that N2 fixation of Trichodesmium is more sensitive to Fe limitation than are the cell yields.
- Subjects
TRICHODESMIUM; CYANOBACTERIA; CHLOROPHYLL; PHOTOSYNTHESIS; NITROGEN fixation; MICROBIAL growth; IRON
- Publication
Biotechnology Letters, 2003, Vol 25, Issue 8, p645
- ISSN
0141-5492
- Publication type
Article
- DOI
10.1023/A:1023068232375