Attempts to retreat from a dead-ended long capillary by backward swimming in Paramecium
We have observed how the ciliate Paramecium attempts to retreat from the dead-end of a long capillary that is too narrow for turning. After many trial-and-error episodes of short-term backward swimming (SBS), which is the conventional avoidance behavior exhibited in free swimming when an obstacle is...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2014-06-01
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| Series: | Frontiers in Microbiology |
| Subjects: | |
| Online Access: | http://journal.frontiersin.org/Journal/10.3389/fmicb.2014.00270/full |
| _version_ | 1819267813174411264 |
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| author | Itsuki eKunita Shigeru eKuroda Kaito eOhki Toshiyuki eNakagaki |
| author_facet | Itsuki eKunita Shigeru eKuroda Kaito eOhki Toshiyuki eNakagaki |
| author_sort | Itsuki eKunita |
| collection | DOAJ |
| description | We have observed how the ciliate Paramecium attempts to retreat from the dead-end of a long capillary that is too narrow for turning. After many trial-and-error episodes of short-term backward swimming (SBS), which is the conventional avoidance behavior exhibited in free swimming when an obstacle is faced, long-term backward swimming (LBS) that lasted five to ten times longer was developed. LBS may have a beneficial effect for complete withdrawal from the capillary space, although in our experiment it was impossible for the organism to do so due to the capillary length. In order to identify a physically possible mechanism for LBS, we propose model equations for the membrane potential of Hodgkin-Huxley type, which describe the control of ciliary movement. The physiological implications and physical mechanism of the development of LBS are discussed. |
| first_indexed | 2024-12-23T21:23:08Z |
| format | Article |
| id | doaj.art-e29947b17e8c4295ba8be92552d30a83 |
| institution | Directory Open Access Journal |
| issn | 1664-302X |
| language | English |
| last_indexed | 2024-12-23T21:23:08Z |
| publishDate | 2014-06-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Microbiology |
| spelling | doaj.art-e29947b17e8c4295ba8be92552d30a832022-12-21T17:30:42ZengFrontiers Media S.A.Frontiers in Microbiology1664-302X2014-06-01510.3389/fmicb.2014.0027090969Attempts to retreat from a dead-ended long capillary by backward swimming in ParameciumItsuki eKunita0Shigeru eKuroda1Kaito eOhki2Toshiyuki eNakagaki3Hokkaido UniversityHokkaido UniversityFuture University HakodateHokkaido UniversityWe have observed how the ciliate Paramecium attempts to retreat from the dead-end of a long capillary that is too narrow for turning. After many trial-and-error episodes of short-term backward swimming (SBS), which is the conventional avoidance behavior exhibited in free swimming when an obstacle is faced, long-term backward swimming (LBS) that lasted five to ten times longer was developed. LBS may have a beneficial effect for complete withdrawal from the capillary space, although in our experiment it was impossible for the organism to do so due to the capillary length. In order to identify a physically possible mechanism for LBS, we propose model equations for the membrane potential of Hodgkin-Huxley type, which describe the control of ciliary movement. The physiological implications and physical mechanism of the development of LBS are discussed.http://journal.frontiersin.org/Journal/10.3389/fmicb.2014.00270/fullParameciummembrane potentialavoidance behaviorlong-term backward swimmingCa$^{2+}$ currentHodgkin-Huxley-type model |
| spellingShingle | Itsuki eKunita Shigeru eKuroda Kaito eOhki Toshiyuki eNakagaki Attempts to retreat from a dead-ended long capillary by backward swimming in Paramecium Frontiers in Microbiology Paramecium membrane potential avoidance behavior long-term backward swimming Ca$^{2+}$ current Hodgkin-Huxley-type model |
| title | Attempts to retreat from a dead-ended long capillary by backward swimming in Paramecium |
| title_full | Attempts to retreat from a dead-ended long capillary by backward swimming in Paramecium |
| title_fullStr | Attempts to retreat from a dead-ended long capillary by backward swimming in Paramecium |
| title_full_unstemmed | Attempts to retreat from a dead-ended long capillary by backward swimming in Paramecium |
| title_short | Attempts to retreat from a dead-ended long capillary by backward swimming in Paramecium |
| title_sort | attempts to retreat from a dead ended long capillary by backward swimming in paramecium |
| topic | Paramecium membrane potential avoidance behavior long-term backward swimming Ca$^{2+}$ current Hodgkin-Huxley-type model |
| url | http://journal.frontiersin.org/Journal/10.3389/fmicb.2014.00270/full |
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