1983
DOI: 10.1104/pp.73.2.377
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Ionic Osmoregulation during Salt Adaptation of the Cyanobacterium Synechococcus 6311

Abstract: ABSTRACIThe mechanisms of salt adaptation were studied in the cyanobacterium Synechococcus 6311. Intracellular volumes and ion concentrations were measured before and after abrupt increases of external NaC concentrations up to 0.6 molar NaCl. Equilibrium volumes, measured with a rapid and accurate electron spin resonance spin probe method, showed that at low NaCl concentrations the cells did not shrink as expected for an impermeable solute. However, when the NaCI concentration exceeded a critical value, volume… Show more

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Cited by 95 publications
(56 citation statements)
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“…The enhanced photosynthetic activity was essential to provide the energy demand for the process of salt adaptation which includes the biosynthesis of sugars for osmoregulation and efficient Na+ exclusion (4). The enhancement in photosynthetic activity observed during the 1st d of adaptation is only partially utilized for soluble sugar accumulation, and may provide the energetic demand for active Na+ extrusion (8).…”
Section: Cm-mentioning
confidence: 99%
See 1 more Smart Citation
“…The enhanced photosynthetic activity was essential to provide the energy demand for the process of salt adaptation which includes the biosynthesis of sugars for osmoregulation and efficient Na+ exclusion (4). The enhancement in photosynthetic activity observed during the 1st d of adaptation is only partially utilized for soluble sugar accumulation, and may provide the energetic demand for active Na+ extrusion (8).…”
Section: Cm-mentioning
confidence: 99%
“…The salt stress challenges the energy requirement for the biosynthesis of soluble sugars, necessary for osmoregulation, and for active Na+ extrusion (4).…”
Section: Cm-mentioning
confidence: 99%
“…Salt acclimation in cyanobacteria occurs in five phases (Hagemann, 2011). A salt shock causes rapid shrinking of the cells due to loss of water (Blumwald et al, 1983) via aquaporins (Shapiguzov et al, 2005). In the second phase, ions including Na + and Cl 2 passively enter the cells and water flows back to the cells (Reed et al, 1985) but cellular processes including photosynthesis (Allakhverdiev et al, 2000) and gene expression (Hagemann et al, 1994;Fulda et al, 2006) remain slow due to high ion (especially Na + ) content of the cells.…”
mentioning
confidence: 99%
“…NaCl directly inhibits the assemblage of the component proteins of nitrogenase by binding to Fe-protein. The inhibition of nitrogenase activity by NaCl in the Azolla fronds may be due to: (i) The disturbed electron transport (Tel-Or and Melhamed-Harel 1981), (ii) the disturbed plasmamembrane permeability (Blumwald et al 1983), and (iii) the inhibition in the photosynthetically generated ATP (Fernandez-Valiente et al 1984). …”
Section: Discussionmentioning
confidence: 99%