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Scanning electron microscopy images of the microaerophilic Fe(II) oxidizers isolated from Norsminde Fjord (A and B) and Kalø Vig (C and D) grown on ZVI plates for 5 days. (A and C) Shown are mostly smooth stalk surfaces. (B and D) Shown are the spikey features that appear on the surface of some stalks when incubation time exceeds 4 days. Scale bars = 1 μm.
