ISSN:
1432-072X
Keywords:
Cyanobacteria
;
Exudation
;
Salt stress
;
Glucosylglycerol
;
Synechocystis
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract When cells of Synechocystis, adapted to 684 mmol/l NaCl, were exposed to hypoosmotic shock by reducing NaCl concentration to more than 250 mmol/l, significant amounts of organic material were liberated which could be increased by increasing shock strength. After maximal hypoosmotic shock (684 mmol/l→ 2 mmol/l NaCl) 40–50% of photosynthetically labelled organic material occurred in the surrounding medium. The main compound exudates was the osmoprotective compound glucosylglycerol. Minor exudates were amino acids, organic acids and carbohydrates. In contrast a hyperosmotic shock (2 mmol/l→684 mmol/l NaCl) liberated only one fourth of the amount liberated by a hypoosmotic shock.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00249013
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