Skip to main content Accessibility help
×
Home

Comparison of the light-limited growth of the nitrogen-fixing cyanobacteria Anabaena and Aphanizomenon

  • W. T. (PIM) DE NOBEL (a1), HANS C. P. MATTHIJS (a1), ERIC VON ELERT (a2) and LUUC R. MUR (a1)

Abstract

The effect of simultaneous N2 fixation and light limitation on the growth of two strains of Anabaena sp. Bory de St. Vincent and Aphanizomenon flos-aquae (L.) Ralfs was investigated using continuous cultures. Under severely light-limited conditions, Aphanizomenon showed a broader absorption spectrum (due to the presence of phycoerythrin), a higher maximum efficiency of photosynthesis, a higher steady-state N2 fixation activity and a higher growth affinity for light than did Anabaena. On the other hand, under light saturation, Anabaena showed a higher maximum rate of O2 production and a higher maximum specific growth rate than Aphanizomenon. These monoculture results characterize Anabaena and Aphanizomenon, in relative terms, as a ‘sun’ and a ‘shade’ species respectively, and are in accordance with field observations. The difference between the two species in their acclimatory response is discussed in terms of a species-specific alteration of the PSI[ratio ]PSII stoichiometry. Besides the species-specific modulation of the accessory pigments, such an acclimation would provide a biochemical basis for the observed physiological differences. The monoculture results were used to differentiate the niches of the two species and suggested that Aphanizomenon would competitively displace Anabaena under N2-fixing, light-limited conditions. However, when both species were grown together, Anabaena became dominant and seemed to be the superior competitor for light. In order to explain this finding, the possible effects of release of allelopathic compounds, or dynamic aspects of light supply, are discussed.

Copyright

Corresponding author

To whom correspondence should be addressed. E-mail: a417pimn@chem.uva.nl

Keywords

Type Description Title
PDF

 PDF (531 KB)
531 KB

Comparison of the light-limited growth of the nitrogen-fixing cyanobacteria Anabaena and Aphanizomenon

  • W. T. (PIM) DE NOBEL (a1), HANS C. P. MATTHIJS (a1), ERIC VON ELERT (a2) and LUUC R. MUR (a1)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed