Four kingdoms on glacier ice: Convergent energetic processes boost energy levels as temperatures fall Export

@article{Napolitano04, abstract = {A diverse group of glacially obligate organisms coexist on temperate glaciers between Washington State and Alaska. A fundamental challenge for these and other cold-adapted species is the necessity to maintain an energy flux capable of sustaining life at low physiological temperatures. We show here that ice-adapted psychrophiles from four kingdoms (Animalia, Eubacteria, Fungi, Protista) respond to temperature fluctuations in a similar manner; namely, ATP levels and the total adenylate pool increase as temperatures fall (within their viable temperature limits, respectively), yet growth rate increases with temperature. By contrast, mesophilic representatives of each kingdom respond in an opposite manner (i.e. adenylates increase with temperature). These observations suggest that elevated adenylate levels in psychrophiles may offset inherent reductions in molecular diffusion at low physiological temperatures.}, author = {Napolitano, M. J. and Shain, D. H.}, citeulike-article-id = {4242519}, journal = {Proceedings of the Royal Society B: Biological Sciences}, number = {Suppliment 5}, pages = {S273--S276}, posted-at = {2009-03-31 16:07:08}, priority = {2}, title = {Four kingdoms on glacier ice: Convergent energetic processes boost energy levels as temperatures fall}, volume = {271}, year = {2004} }

TY - JOUR ID - Napolitano04 L3 - citeulike-article-id:4242519 N2 - A diverse group of glacially obligate organisms coexist on temperate glaciers between Washington State and Alaska. A fundamental challenge for these and other cold-adapted species is the necessity to maintain an energy flux capable of sustaining life at low physiological temperatures. We show here that ice-adapted psychrophiles from four kingdoms (Animalia, Eubacteria, Fungi, Protista) respond to temperature fluctuations in a similar manner; namely, ATP levels and the total adenylate pool increase as temperatures fall (within their viable temperature limits, respectively), yet growth rate increases with temperature. By contrast, mesophilic representatives of each kingdom respond in an opposite manner (i.e. adenylates increase with temperature). These observations suggest that elevated adenylate levels in psychrophiles may offset inherent reductions in molecular diffusion at low physiological temperatures. IS - Suppliment 5 JF - Proceedings of the Royal Society B: Biological Sciences EP - S276 TI - Four kingdoms on glacier ice: Convergent energetic processes boost energy levels as temperatures fall VL - 271 SP - S273 AU - Napolitano, MJ AU - Shain, DH PY - 2004/// ER -