Istituto di Biofisica     
Cercignani G., Lucia S., Petracchi D. Photoresponses of Halobacterium salinarum to Repetitive Pulse Stimuli. In: Biophysical Journal, vol. 75 (3) pp. 1466 - 1472. Biophysical Society, 1998.
Halobacterium salinarum cells from 3-day-old cultures have been stimulated with different patterns of repetitive pulse stimuli. A short train of 0.6-s orange light pulses with a 4-s period resulted in reversal peaks of increasing intensity. The reverse occurred when blue light pulses were delivered as a finite train: with a 3-s period, the response declined in sequence from the first to the last pulse. To evaluate the response of the system under steady-state conditions of stimulation, continuous trains of pulses were also applied; whereas blue light always produced a sharply peaked response immediately after each pulse, orange pulses resulted in a declining peak of reversals that lasted until the subsequent pulse. An attempt to account for these results in terms of current excitation/adaptation models shows that additional mechanisms appear to be at work in this transduction chain.
URL: http://www.biophysj.org/cgi/content/abstract/75/3/1466?maxtoshow=&HITS=10&hits=10&RESULTFORMAT=&author2=cercignani&searchid=1&FIRSTINDEX=0&resourcetype=HWCIT
Subject Sensory transduction

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