Species diversity and systematics of diatoms based auxospore morphology
| Project/Area Number |
15570087
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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 |
Biodiversity/Systematics
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| Research Institution | The Nippon Dental University |
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Principal Investigator |
NAGUMO Tamotsu The Nippon Dental University, School of Dentistry at Tokyo, Professor, 歯学部, 教授 (70120706)
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| Co-Investigator(Kenkyū-buntansha) |
OSADA Keigo The Nippon Dental University, School of Dentistry at Niigata, Associate Professor, 新潟歯学部, 助教授 (10147829)
IDEI Masahiko Bunkyo University Women's College, Professor, 女子短期大学部, 教授 (60143624)
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| Project Period (FY) |
2003 – 2004
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| Project Status |
Completed (Fiscal Year 2004)
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| Budget Amount *help |
¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 2004: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2003: ¥2,000,000 (Direct Cost: ¥2,000,000)
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| Keywords | Diatom / sexual reproduction / auxospore / eproduction / Systematic taxonomy / cryptophyceae / Bacillariophyta / Phycology |
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| Research Abstract |
Recent studies have led to a rapid increase in knowledge on auxospore formation in diatoms. However, these studies have been limited to centric and raphid pennate diatoms and there is still very little information for the araphid pennate group. We studied the diversity of the auxospore and the initial cell of about 30 taxa in Japanese samples. Genus Lampliscus, Arachnoidiscus, Grammatophora, Ethmia, Gephiria, Eunotia, Achnanthes, Cocconeis, Neidium, Diploneis, Amphora, Entomoneis.
These materials were studies using LM and SEM. SEM observation revealed that many transverse perizonial bands, all of which were incomplete rings. There was an irregular longitudinal structure beneath the ventral suture of the transverse perizonium. This structure is presumably equivalent to the longitudinal perizonium in other pennate diatoms. Scales were found both in the inner wall of the perizonium and around the primary perizonial bands in almost species. Presence or absence of scales reflect the phylogenetical trends of diatoms, and when and where exist scales depends on the auxospore structure.
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Report
(3 results)
Research Products
(21 results)
