Table 6.

Organic osmotic solutes within moderately halophilic bacteriaa

SpeciesbGlycine betaineEctoineHydroxyectoineTrehaloseOthers
Micrococcus halobius ++++Glucose, glutamate
“Micrococcus varians subsp.halophilus+++Glucose, glutamate
Marinococcus halophilus ++++Glucose
Marinococcus albus +++Alanine
Planococcus citreus Proline, N-acetylornithine,N-acetyllysine
Halobacillus halophilus ++Proline, N-acetyllysine
Salinicoccus roseus* +Proline
Salinicoccus hispanicus* +Proline
Halomonas halophila +++Glutamate
Halomonas elongata +++Glutamate, glucose
Halomonas halmophila +++Glutamate, alanine
Halomonas halodenitrificans ++Glutamate, glucose
Halomonas salina +++Glutamate
Halomonas variabilis* +++++++
Halomonas eurihalina +++Glutamate
Salinivibrio costicola ++Glutamate
Chromohalobacter marismortui* +++
“Pseudomonas halosaccharolytica” +++
Bacillus haloalkaliphilus +++ N-Acetylornithine
Bacillus halophilus ++Proline,N-acetylornithine
  • a Data were derived from references43, 87, and 306.

  • b ++, present in high concentrations; +, present in minor amounts; ∗, yeast extract was present in the medium, enabling the accumulation of glycine betaine.