Competition for phosphorus between the nitrogen-fixing cyanobacteria Anabaena and AphanizomenonDeNobel, WT., Snoep, JL. & Mur, LR., Nov-1997, In : FEMS Microbial Ecology. 24, 3, p. 259-267 9 p.
Research output: Contribution to journal › Article › Academic › peer-review
The influence of Na fixation on the P-limited growth of two strains of Anabaena and Aphanizomenon was investigated using continuous cultures. Under N-2-fixing conditions Anabaena had a higher maximum growth rate, a greater affinity for P, a higher yield on P and a higher N-2 fixation activity than Aphanizomenon. In contrast to Anabaena, Aphanizomenon did not adjust its specific N-2 fixation activity and its cells became N depleted at high growth rates. Metabolic control analysis revealed that the growth rate of Aphanizomenon was controlled to a lesser extent by P than Anabaena's growth rate. As predicted on the basis of these monoculture measurements, Anabaena was the superior competitor for P in competition experiments. The results might help to distinguish the niches of these two closely related species.
|Number of pages||9|
|Journal||FEMS Microbial Ecology|
|Publication status||Published - Nov-1997|
- Anabaena, Aphanizomenon, cyanobacteria, nitrogen fixation, phosphorus limitation, resource competition, METABOLIC CONTROL ANALYSIS, GROWTH-RATE, PHYTOPLANKTON GROWTH, CONTINUOUS-CULTURE, FRESH-WATER, FLOS-AQUAE, CHEMOSTAT, FIXATION, LIGHT