2005 Fiscal Year Final Research Report Summary
Ultrastructures and regulatory mechanisms involved in the determination of thecal plate patterns in armored dinoflagelates.
| Project/Area Number |
16570056
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Morphology/Structure
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| Research Institution | Kochi University |
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Principal Investigator |
OKUDA Kazuo Kochi University, Graduate School of Kuroshio Science, professor, 大学院・黒潮圏海洋科学研究科, 教授 (40152417)
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| Co-Investigator(Kenkyū-buntansha) |
SEKIDA Satoko Kochi University, Graduate School of Kuroshio Science, assistant professor, 大学院・黒潮圏海洋科学研究科, 助手 (70314979)
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| Project Period (FY) |
2004 – 2005
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| Keywords | dinoflagellate / thecal plate / cortical microtubule |
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| Research Abstract |
In an attempt to better understand the role of cortical microtubules in dinoflagellates, various intensity of high pressure was applied to non-motile cells (just after ecdysis) of Scrippsiella hexapraecingula. In non-motile cells just after the exposure of high pressure, cortical microtubules were disorganized remarkably by high pressure not less than 98 MPa for 5-15 min, whereas they were intact under high pressure conditions of lower than 98 MPa for 5 min. After non-motile cells were exposed by pressure high enough to disorganize cortical microtubules, they produced new motile cells whose thecal plate patterns were changed remarkably from the thecal plate pattern known in this species. When the intensity of high pressure exposing non-motile cells increased, the rate of the non-motile cells in which cortical microtubules were disorganized increased, and also the rate of the non-motile cells whose thecal plate pattern were changed increased concomitantly. This suggests that high pressure disorganizes cortical microtubules in non-motile cells, by which changes in thecal plate pattern may be caused in new motile cells produced by the non-motile cells.
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Research Products
(2 results)
