Increase of Salt Tolerance in Carbon-Starved Cells of Rhodopseudomonas palustris Depending on Photosynthesis or Respiration

Bacteria in natural environments are frequently exposed to nutrient starvation and survive against environmental stresses under non-growing conditions. In order to determine the energetic influence on survivability during starvation, changes in salt tolerance were investigated using the purple photo...

Full description

Saved in:
Bibliographic Details
Published in:Microorganisms (Basel) 2018-01, Vol.6 (1), p.4
Main Authors: Wasai, Sawa, Kanno, Nanako, Matsuura, Katsumi, Haruta, Shin
Format: Article
Language:English
Subjects:
Abiotic stress
Aerobic respiration
Anaerobic conditions
ATP
Bacteria
Carbon
carbon starvation
cellular energy
E coli
Environmental stress
Light
Natural environment
Photosynthesis
purple photosynthetic bacteria
Rhodopseudomonas palustris
salt stress tolerance
Salt tolerance
Sodium chloride
Survivability
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Bacteria in natural environments are frequently exposed to nutrient starvation and survive against environmental stresses under non-growing conditions. In order to determine the energetic influence on survivability during starvation, changes in salt tolerance were investigated using the purple photosynthetic bacterium after carbon starvation under photosynthetic conditions in comparison with anaerobic and aerobic dark conditions. Tolerance to a treatment with high concentration of salt (2.5 M NaCl for 1 h) was largely increased after starvation under anaerobically light and aerobically dark conditions. The starved cells under the conditions of photosynthesis or aerobic respiration contained high levels of cellular ATP, but starvation under the anaerobic dark conditions resulted in a decrease of cellular ATP contents. To observe the large increase of the salt tolerance, incubation of starved cells for more than 18 h under illumination was needed. These results suggest that the ATP-dependent rearrangement of cells induced salt tolerance.
ISSN:2076-2607
2076-2607
DOI:10.3390/microorganisms6010004