Abstract
It is unknown to which extent phototrophic Fe(II) oxidation takes place in the simultaneous presence of organic electron donors (e.g., acetate/lactate). Therefore, the photoferrotrophic strain Rhodopseudomonas palustris TIE-1 was inoculated with various combinations of Fe(II), acetate and lactate to understand metabolic substrate preference. When acetate was provided together with Fe(II), TIE-1 consumed acetate first before Fe(II). When provided lactate plus Fe(II), TIE-1 consumed both substrates in parallel. When all three substrates were provided in one culture, TIE-1 used all substrates simultaneously. Our study suggests that the availability of alternative electron donors in addition to ferrous iron limits phototrophic iron oxidation.
Original language | English (US) |
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Pages (from-to) | 835-843 |
Number of pages | 9 |
Journal | Geomicrobiology Journal |
Volume | 31 |
Issue number | 9 |
DOIs | |
State | Published - Oct 1 2014 |
Bibliographical note
Publisher Copyright:© 2014, Copyright © Taylor & Francis Group, LLC.
Keywords
- carbon flow
- iron redox cycling
- phototrophic Fe(II) oxidation