Multiple roles of siderophores in free-living nitrogen-fixing bacteria

  title={Multiple roles of siderophores in free-living nitrogen-fixing bacteria},
  author={Anne M. L. Kraepiel and Jean Phillipe Bellenger and Thomas Wichard and François M M Morel},
Free-living nitrogen-fixing bacteria in soils need to tightly regulate their uptake of metals in order to acquire essential metals (such as the nitrogenase metal cofactors Fe, Mo and V) while excluding toxic ones (such as W). They need to do this in a soil environment where metal speciation, and thus metal bioavailability, is dependent on a variety of factors such as organic matter content, mineralogical composition, and pH. Azotobacter vinelandii, a ubiquitous gram-negative soil diazotroph… CONTINUE READING
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