Chemotaxis of Caenorhabditis elegans during simultaneous presentation of two water-soluble attractants, l-lysine and chloride ions

Lysine and chloride ions are water-soluble attractants for Caenorhabditis elegans. When chemotaxis behavior to either of these attractants was assayed separately, the radial concentration gradients of 3 M lysine and 0.1 M ammonium chloride had similar potencies for attracting worms. However, when th...

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Bibliographic Details
Published in:Comparative biochemistry and physiology. Part A, Molecular & integrative physiology Molecular & integrative physiology, 2005-11, Vol.142 (3), p.308-317
Main Authors: Shingai, Ryuzo, Wakabayashi, Tokumitsu, Sakata, Kazumi, Matsuura, Tetsuya
Format: Article
Language:English
Subjects:
Ammonium Chloride
Animals
Behavior
Behavior, Animal
Caenorhabditis elegans - physiology
Chemical stimuli
Chemotaxis - physiology
Choice
Concentration gradient
Lysine
Nematode
Nervous system
Nervous System Physiological Phenomena
Neural signaling
Sensation - physiology
Sensory information
Water
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Summary:Lysine and chloride ions are water-soluble attractants for Caenorhabditis elegans. When chemotaxis behavior to either of these attractants was assayed separately, the radial concentration gradients of 3 M lysine and 0.1 M ammonium chloride had similar potencies for attracting worms. However, when the concentration gradients of lysine and ammonium chloride at these concentrations were presented simultaneously, worms preferred lysine to ammonium chloride more than expected from the results obtained in separate experiments, suggesting the presence of an interaction between these two sensory information pathways within the nervous system. Chemotaxis behavior toward the radial concentration gradient of one of these attractants superimposed on a uniform concentration of the other attractant showed that the chemotaxis was augmented or attenuated by the ammonium chloride background depending on the background concentration, and attenuated by the lysine background, further supporting the interaction between the two sensory information pathways.
ISSN:1095-6433
1531-4332
DOI:10.1016/j.cbpa.2005.07.010