Competition for phosphorus between the nitrogen-fixing cyanobacteria Anabaena and Aphanizomenon

WT DeNobel*, JL Snoep, LR Mur

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

44 Citaten (Scopus)


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.

Originele taal-2English
Pagina's (van-tot)259-267
Aantal pagina's9
TijdschriftFEMS Microbial Ecology
Nummer van het tijdschrift3
StatusPublished - nov.-1997

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