Evolutional and phylogenetic analysis of the symbiosis between hydra and chlorella
| Project/Area Number |
23570118
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Biodiversity/Systematics
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| Research Institution | Kyushu University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
TACHIDA Hidenori 九州大学, 理学研究院, 教授 (70216985)
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2013: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2012: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2011: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
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| Keywords | symbiosis / green hydra / chlorella / brown hydra / chlorococcum / Hydra / Chlorella / molecular phylogeny |
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| Research Abstract |
We reconstructed molecular phylogenetic trees of several strains of symbiotic chlorella harbored in the endodermal epithelial cells of viridissima group hydra strains and investigated their congruence with the molecular phylogenetic trees of the host hydra strains. We also confirmed the vertical transition of the symbiotic chlorella through the both reproduction process, asexual budding and the oogenesis in the sexual reproduction. Based on the results, we proposed following hypothesis; Symbiosis with chlorella occurred once in ancestral viridissima group Hydra species, and once established, symbiosis has been conservative in nature and has continued over a long term with occasional cospeciation. We also suspected that the symbiosis between hydra and chlorella have its origin in the age before the breakup of Pangaea.
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Report
(4 results)
Research Products
(14 results)
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[Presentation] Molecular phylogenetic study in genus Hydra2011
Author(s)
Kawaida H, Ohba K., Shimizu H, Fujisawa T, Tachida H, and Kobayakawa Y.
Organizer
International Workshop"Searching for Eve : basal metazoans and the evolution of multicellular complexity"
Place of Presentation
Evangelische Akademie Tutzing, Germany
Related Report
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[Presentation] Molecular phylogenetic study in genus Hydra2011
Author(s)
Kawaida H, Ohba K., Shimizu H, Fujisawa T, Tachida H, and *Kobayakawa Y.
Organizer
International Workshop "Searching for Eve: basal metazoans and the evolution of multicellular complexity"
Place of Presentation
Evangelische Akademie Tutzing, Germany,
Related Report
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