| Abstract: | E. coli has a number of biochemical systems which protect cells from different chemical and physical damages. The aim of this work is to characterize the interaction between two of these: the osmoregulation system and the heat shock system. It is shown that exposure of E. coli to 42 degrees C to induce hsps synthesis, abolish the growth inhibition by high (0.45 M) NaCl concentration. Also, transient pretreatment of cells with high NaCl protect them from heat damage. It is shown that osmotic shock induces the hsps synthesis. The cell growth restoration after the complete inhibition by high (0.6 M) NaCl concentration correlates with the hsps accumulation. Moreover the heat shock treatment reduces the adaptation time. |
