%0 Journal Article %A Albesa, Inés %A Barberis, Lucila I. %A Pájaro, María C. %A Eraso, Alberto J. %T Pyoverdine Production by Pseudomonas fluorescens in Synthetic Media with Various Sources of Nitrogen %D 1985 %J Microbiology, %V 131 %N 12 %P 3251-3254 %@ 1465-2080 %R https://doi.org/10.1099/00221287-131-12-3251 %I Microbiology Society, %X Summary: The influence of the nitrogen source on pyoverdine production by Pseudomonas fluorescens grown in chemostat culture in synthetic media at constant pH was studied. Pigment synthesis was highest in a medium with proline as the nitrogen source; other amino acids were less effective in promoting pigment synthesis. The pH and Fe3+ content of the media affected pyoverdine production. The ratio of pigment to growth was maximal at pH 8. When the Fe3+ concentration was increased from 10 to 200 μg 1−1 in media with the same nitrogen source, pyoverdine synthesis decreased. Since the Fe3+ contents of the synthetic media were different, the amount present was adjusted to a standard concentration to permit comparisons between the various nitrogen sources. %U https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-131-12-3251