Photoresponses of Halobacterium salinarum to repetitive pulse stimuli.
Biophys J
; 75(3): 1466-72, 1998 Sep.
Article
en En
| MEDLINE
| ID: mdl-9726948
ABSTRACT
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.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Halobacterium salinarum
Idioma:
En
Revista:
Biophys J
Año:
1998
Tipo del documento:
Article
País de afiliación:
Italia