Xy. Xu et al., TREHALOSE AS OSMOPROTECTANT IN RHODOBACTER-SPHAEROIDES F-SP. DENITRIFICANS IL106, Bioscience, biotechnology, and biochemistry, 62(2), 1998, pp. 334-337
The photosynthetic bacterium Rhodobacter sphaeroides f. sp. denitrific
ans IL106 can grow in high osmolarity. The accumulation of intracellul
ar inorganic ions and organic solutes in cells grown in a synthetic me
dium containing different concentrations of NaCl was examined. Togethe
r with potassium ion, trehalose was the major organic osmoprotectant a
nd its accumulation depended on the external salt concentration. Intra
cellular levels of glycine betaine and other osmoprotectants such as p
roline did not change when osmolarity increased.