Summary
Photosynthetic, prokaryotic blue-green algae (cyanobacteria) occur in a wide range of natural habitats of diverse ionic composition and, as such, represent an important source of biological material for biosolar energy conversion programs using saline water. The gasvacuolate, filamentous Spirulina is grown in ‘seminatural’ culture in Lake Texcoco, Mexico, as a major source of single-cell protein for animal nutrition. Pilot-scale trials in other areas of the world have also demonstrated the suitability of blue-green algae, including Spirulina, for growth under brackish conditions. The carbohydrate accumulation profiles of blue-green algae differ in isolates from freshwater, marine and hypersaline habitats, with a trend towards sucrose or trehalose accumulation in stenohaline freshwater strains grown in media containing NaCl, while euryhaline and marine forms frequently accumulate glucosylglycerol. Many halotolerant isolates from hypersaline habitats accumulate glycinebetaine in response to osmotic stress. This knowledge may provide scope for future improvement in the N2 fixation rates of blue-green algae in saline media, using betaine-accumulating N2-fixing strains in preference to other, salt-sensitive isolates.
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© 1985 Martinus Nijhoff Publishers, Dordrecht
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Reed, R.H., Warr, S.R.C., Richardson, D.L., Moore, D.J., Stewart, W.D.P. (1985). Blue-green algae (cyanobacteria): prospects and perspectives. In: Pasternak, D., San Pietro, A. (eds) Biosalinity in Action: Bioproduction with Saline Water. Developments in Plant and Soil Sciences, vol 17. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-5111-2_7
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