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Resources » Paper

Kiyoshi Kawamura et al. (2005) International Worm Meeting "Kinematics of C. elegans in the gradient of attractants and temperature"

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    Status:
    Publication type:
    Meeting_abstract
    WormBase ID:
    WBPaper00025834

    Kiyoshi Kawamura, Keiko Hirayama, Yoshiichiro Kitamura, & Kotaro Oka (2005). Kinematics of C. elegans in the gradient of attractants and temperature presented in International Worm Meeting. Unpublished information; cite only with author permission.

    To investigate how C. elegans finds the peak of concentration of attractant or desired temperature, we have recorded movement of the worm in the gradient of attractant or temperature and analysed the recorded tracks in terms of kinematics. When temperature distribution is homogenious and the attractant concentration is high enough, most worms found the gradient of attractant concentration by curving. This implies that the pirouette is not fundamental on the way to the peak of the concentration of attractant. To be accumulated near the peak region, worms frequently made pirouttes and pirouttes are fundamental for accumulation. In the presense of low attractant concentration or small temperature gradient, worms exhibited frequent pirouttes just after they were transfered to the assay plate but they finally found their way by curving. Behavior in the thermal gradient and gradient of attractant concentration dramatically depends on the relative direction of the two gradient vectors: When the prefered directions are the same, the worm found the way by curving but when they are opositely directed, worms at first had made frequent pirouttes until they found their way. From these experimental results, we discuss pathways of neuronal signal for chemotaxis and thermotaxis.

    Affiliation:
    - Dept Bioscience & Informatics, Keio Univ, Yokohama, Japan


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