Back to Search
Start Over
Color-specific conditioning effects due to both orange and blue stimuli are observed in a Halobacterium salinarum strain devoid of putative methylatable sites on HtrI.
- Source :
-
Photochemistry and photobiology [Photochem Photobiol] 2003 Jan; Vol. 77 (1), pp. 110-3. - Publication Year :
- 2003
-
Abstract
- Behavioral responses of Halobacterium salinarum appear as changes in the frequency of motion reversals. Turning on orange light decreases the reversal frequency, whereas blue light induces reversals. Light pulses normally induce the same response as step-up stimuli. However, anomalous behavioral reactions, including inverse responses, are seen when stimuli are applied in sequence. The occurrence of a prior stimulus is conditioning for successive stimulation on a time scale of the same order of adaptational processes. These prolonged conditioning effects are color-specific. The only adaptation process identified so far is methylation of the transducers, and this could be somehow color-specific. Therefore we tested for the behavioral anomalies in a mutant in which all methylation sites on the transducer have been eliminated. The results show that behavioral anomalies are unaffected by the absence of methylation processes on the transducer.
- Subjects :
- Adaptation, Physiological radiation effects
Archaeal Proteins genetics
Halobacterium salinarum classification
Halobacterium salinarum genetics
Membrane Proteins genetics
Methylation radiation effects
Mutation
Signal Transduction radiation effects
Archaeal Proteins metabolism
Color
Halobacterium salinarum metabolism
Halobacterium salinarum radiation effects
Light
Membrane Proteins metabolism
Subjects
Details
- Language :
- English
- ISSN :
- 0031-8655
- Volume :
- 77
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Photochemistry and photobiology
- Publication Type :
- Academic Journal
- Accession number :
- 12856891
- Full Text :
- https://doi.org/10.1562/0031-8655(2003)077<0110:cscedt>2.0.co;2