Polar and lateral flagellar motors of marine Vibrio are driven by different ion-motive forces

@article{Atsumi1992PolarAL,
  title={Polar and lateral flagellar motors of marine Vibrio are driven by different ion-motive forces},
  author={Tatsuo Atsumi and Linda McCartert and Yasuo Imae},
  journal={Nature},
  year={1992},
  volume={355},
  pages={182-184}
}
VARIOUS species of marine Vibrio produce two distinct types of flagella, each adapted for a different type of motility1. A single, sheathed polar flagellum is suited for swimming in liquid medium, and numerous unsheathed lateral flagella, which are produced only under viscous conditions, are suited for swarming over viscous surfaces2-3. Both types of flagella are driven by reversible motors embedded in the cytoplasmic membrane. Here we report that the energy source for the polar flagellar motor… 
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Bacterial lateral flagella: an inducible flagella system.
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Flagellar motors of marine bacteria Halomonas are driven by both protons and sodium ions.
TLDR
The results showed that the flagellar motors of the Halomonas strains were energized by both H+ and Na+ in one cell, which may reflect ecophysiological versatility to adapt to a wide range of salt conditions of the marine environment.
Flagellar motility in bacteria structure and function of flagellar motor.
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