Folia Microbiologica

, Volume 22, Issue 1, pp 35–39 | Cite as

Effect of iron-beryllium antagonism on the growth ofPseudomonas fluorescens type S

  • J. MacCordick
  • M. Th. Youinou
  • B. Wuetz


Studies of the growth ofPseudomonas fluorescens type S in acidified peptone nutrient broth supplemented with potassium dioxalatoberyllate show that the inhibitory action of beryllium on the lag phase can be strongly counteracted by an increase in the iron content of the medium. In terms of relative concentrations, Fe3+ is up to 250 times more effective than Mg2+ as an antagonist of beryllium under the conditions employed. Conversely, evidence of the effect of beryllium on iron-dependent constituents of the cell is provided by the fact that cultures ofPseudomonas fluorescens adapted to relatively high concentrations of beryllium show a marked decrease in cytoohromec content.


Iron Content Beryllium Peptone Medium Peptone Broth Normal Iron Content 
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Copyright information

© Institute of Microbiology, Academy of Sciences of the Czech Republic 1977

Authors and Affiliations

  • J. MacCordick
    • 1
  • M. Th. Youinou
    • 1
  • B. Wuetz
    • 1
  1. 1.Laboratoires de Spectrochimie Moléculaire et de Biochimie MicrobienneUniversité Louis PasteurStrasbourgFrance

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