Biotechnology Letters

, Volume 25, Issue 8, pp 645–649

Growth, N2 fixation and photosynthesis in a cyanobacterium, Trichodesmium sp., under Fe stress

  • Fei-xue Fu
  • P.R.F. Bell

DOI: 10.1023/A:1023068232375

Cite this article as:
Fu, F. & Bell, P. Biotechnology Letters (2003) 25: 645. doi:10.1023/A:1023068232375


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.

Fe limitationgrowth rateN2 fixationphotosynthesisTrichodesmium

Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • Fei-xue Fu
    • 1
  • P.R.F. Bell
    • 1
  1. 1.Department of Chemical EngineeringThe University of QueenslandBrisbane QldAustralia