RELEASE OF GLUCOSYLGLYCEROL FROM THE CYANOBACTERIUM SYNECHOCYSTIS SPEC SAG-92.79 BY HYPOOSMOTIC SHOCK

被引:21
作者
FULDA, S
HAGEMANN, M
LIBBERT, E
机构
[1] Sektion biologie, Wilhelm-Pieck-Universität, Rostock, DDR-2500, Doberaner Strasse 143, Germany (Democratic Republic
关键词
Cyanobacteria; Exudation; Glucosylglycerol; Salt stress; Synechocystis;
D O I
10.1007/BF00249013
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
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. © 1990 Springer-Verlag.
引用
收藏
页码:405 / 408
页数:4
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