Gerloff-Elias Antje, Barua Deepak, Mölich Andreas, Spijkerman Elly
Institute of Biochemistry and Biology, University of Potsdam, Potsdam, Germany.
FEMS Microbiol Ecol. 2006 Jun;56(3):345-54. doi: 10.1111/j.1574-6941.2006.00078.x.
Chlamydomonas acidophila, a unicellular green alga, is a dominant phytoplankton species in acidic water bodies, facing severe environmental conditions such as low pH and high heavy metal concentrations. We examined the pH-, and temperature-dependent accumulation of heat-shock proteins in this alga to determine whether heat-shock proteins play a role in adaptation to their environment. Our results show increased heat-shock proteins accumulation at suboptimal pHs, which were not connected with any change in intracellular pH. In comparison to the mesophilic Chlamydomonas reinhardtii, the acidophilic species exhibited significantly higher accumulations of heat-shock proteins under control conditions, indicating an environmental adaptation of increased basal levels of heat-shock proteins. The results suggest that heat-shock proteins might play a role in the adaptation of C. acidophila, and possibly other acidophilic algae, to their extreme environment.
嗜酸衣藻是一种单细胞绿藻，是酸性水体中的优势浮游植物物种，面临着低pH值和高重金属浓度等严峻的环境条件。我们研究了这种藻类中热休克蛋白的pH值和温度依赖性积累，以确定热休克蛋白是否在适应其环境中发挥作用。我们的结果表明，在非最适pH值下热休克蛋白的积累增加，这与细胞内pH值的任何变化无关。与嗜温莱茵衣藻相比，嗜酸物种在对照条件下热休克蛋白的积累显著更高，表明热休克蛋白基础水平增加的环境适应性。结果表明，热休克蛋白可能在嗜酸衣藻以及可能其他嗜酸藻类适应其极端环境中发挥作用。
