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Resources » Paper

Tokumitsu Wakabayashi et al. (2007) International Worm Meeting "Caenorhabditis elegans mutants having altered preference of chemotaxis behavior during simultaneous presentation of two chemoattractants."

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  • Comments on Tokumitsu Wakabayashi et al. (2007) International Worm Meeting "Caenorhabditis elegans mutants having altered preference of chemotaxis behavior during simultaneous presentation of two chemoattractants." (0)

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    Publication type:
    Meeting_abstract
    WormBase ID:
    WBPaper00030218

    Tokumitsu Wakabayashi, Jun-ya Ishizeki, & Ryuzo Shingai (2007). Caenorhabditis elegans mutants having altered preference of chemotaxis behavior during simultaneous presentation of two chemoattractants presented in International Worm Meeting. Unpublished information; cite only with author permission.

    Upon presentation of two distinct chemoattractants such as sodium acetate and diacetyl simultaneously, the nematode C. elegans was preferentially attracted by one of these chemoattractants even when using a particular concentration of attractants inducing the same strength of chemotaxis behavior in separate single presentation experiments. We referred this behavior as a result of the chemosensory informational integration within the C. elegans nervous system. We isolated mutants having altered preference of chemotaxis behavior toward simultaneous presentation of sodium acetate and diacetyl chep-1(qs1) (for chemosensory preference) mutant preferred sodium acetate to diacetyl while chep-2(qs2) mutant preferred diacetyl to sodium acetate in simultaneous presentation of 1/1,000 dilution of diacetyl and various concentrations of sodium acetate. The altered preference of chemotaxis behavior of chep-1(qs1) mutant in simultaneous presentation could be explained by the defect of the mutant in single presentation. In contrast, the altered preference of chemotaxis behavior of chep-2(qs2) mutant in simultaneous presentation could not be explained by the defect in single presentation, suggesting the function of chep-2 gene products within the chemosensory informational integration pathway as well as in the chemosensory pathway. We also isolated another set of mutants with altered preference of chemotaxis behavior toward multiple chemoattractants by using Mos1-mediated mutagenesis (1). Under the condition in which wild-type C. elegans was attracted more preferentially by sodium acetate (simultaneous two-spot presentation of 0.7M sodium acetate and 1/10,000 dilution of diacetyl), chep(qs3) and chep(qs4) mutants were attracted by either of these chemoattractant evenly. Identification of gene responsible for these mutations is currently in progress. 1. Bessareau, J. L. et al. Nature 413, 70-74. (2001).


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