Journal of Protistology
Online ISSN : 2433-412X
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Regular Article
  • Ryuji Yanase, Yukinori Nishigami, Masatoshi Ichikawa, Tohru Yoshihisa, ...
    Volume 51 (2018) Pages 1-6
    Released: March 08, 2018
    JOURNALS OPEN ACCESS FULL-TEXT HTML

    The free-living ciliate protist Lacrymaria olor has an extendable neck, which extends up to 8 times longer than its cell body. Previous papers assessed several ultrastructural features of L. olor; however, dynamic features of the extension and contraction cycle of the neck have been unclear. As a first step to understand the mechanism of such dynamic processes, we tried to characterize the neck deformation of living L. olor using a high-speed camera and image processing. These analyses defined the four different cell states, namely, active, resting, activation and inactivation, and highlighted the features of the neck deformation of L. olor depending upon the cell states. Our analyses will make it possible to elucidate further details of the L. olor neck deformation mechanism.

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