Protistology 8 (1) 8–15 (2013) |
Heat shock proteins of free-living ciliates and their impact on cell adaptation to salinity stress |
1 Zoological Institute, Russian Academy of Sciences, St. Petersburg, Russia
Summary The paper describes the comparative analysis of our own experimental data concerning the chaperone activity of 70 kDa heat shock protein (HSP70) in three free-living ciliate species, Paramecium jenningsi, Tetrahymena pyriformis, Paramecium nephridiatum, belonging to the eufreshwater, metafreshwater and euryhaline ecological groups of unicellular organisms. These ciliates revealed different protecting strategies and adaptive potential of their chaperon defensive system regarding to the salinity stress. We infer that the constitutive level of HSP70 content in free-living ciliates reflects the environmental conditions of locations, where from these species originated. Consequently, when evaluating the ecological importance of constitutive HSP70 level in hydrobionts, it is necessary to take into account not only contemporary conditions of their existence, but the chaperone system “memory” as well. Key words: chaperone system, free-living ciliates, heat shock proteins, HSP70, ecological groups of hydrobionts, Paramecium nephridiatum, Paramecium jenningsi, Tetrahymena pyriformis, salinity adaptation Address for correspondence: Andrew Goodkov. Institute of Cytology, Russian Academy of Sciences, Tikhoretsky Ave. 4, St. Petersburg, 194064, Russia; e-mail: pelgood1@gmail.com |
| Load PDF | Back to Contents | |