2007 Fiscal Year Final Research Report Summary
Molecular biological analyses of receptorlike proteins responsible for sexual reproduction in Clasterium
| Project/Area Number |
18570050
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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 |
植物生理・分子
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| Research Institution | Japan Women's University |
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Principal Investigator |
SEKIMOTO Hiroyuki Japan Women's University, Faculty of Sciences, Associate Professor (20281652)
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| Co-Investigator(Kenkyū-buntansha) |
ITO Motomi University of Tokyo, Graduate School of Arts and Sciences, Professor (00193524)
ABE Jun Japan Women's University, Faculty of Sciences, Researcher (10424764)
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| Project Period (FY) |
2006 – 2007
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| Keywords | Closterium / sexual reproduction / receptor / sex pheromone |
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| Research Abstract |
The desmid Closterium peracerosum-strigosum-littorale complex (C. pslc), which is the closest unicellular sister to land plants, is the best-characterized of the charophycean green algae with respect to the process of sexual reproduction. Two sex pheromones (PR-IP and PR-IP Inducer) involved in the progress of sexual reproduction of the C. pslc have been well characterized. In addition, putative receptor molecules (CpRLK1, CpRLP1) for these pheromones have been identified.
From the results of two hybrid systems, presences of week interactions between PR-IP Inducer and CpRLK1 and between 19-kDa subunit and CpRLPI were confirmed. To identify another receptor molecules for pheromones, two-hybrid screenings from cDNA library for sexual reproductive processes were performed using cDNAs encoding respective pheromones as baits. As a result, two genes showing an increase in expression during sexual reproduction were identified when 19-kDa subunit of PR-IP was used as a bait. In the case of PR-IP Inducer, one gene showing significant similarity with a previously identified gene (Cp-01) was screened at multiple times The expression of Cp-01 was elevated only in mt^+ cells by the addition of PR-IP Inducer.
To further elucidate their sexual reproduction, the transformation system for the C. pslc by using particle bombardment method was constructed. Two GFP constructs driven by endogenous promoters of C. pslc (CpHSP7Op and CpCABp, which are highly and constitutively expressed through the reproduction processes) were prepared and introduced into the cell by particle bombardment. These GFP signals could be transiently detected in the cytoplasm during 48-72 h after bombardment. When a GFP-fusion construct with a nucleus-localized selective marker gene (ble) was introduced, the GFP signal was only visible in the nucleus. These results indicate that this method and strategy are applicable to study cellular localization of unknown gene products during the sexual reproduction in C. pslc.
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[Journal Article] Effect of antibiotics on cell2008
Author(s)
Abe, J., Sakayori, K., Sekimoto, H
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Journal Title
proliferation in the Closterium peracerosum-strigosum-littorale complex (Charophyceae, Chlorophyta).Biologia (in press)
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Convergent evolution of shoots in land plants : lack of auxin polar transport in moss shoots2008
Author(s)
Fujita, T., Sakaguchi, H., Hiwatashi, Y., Wagstaff, S., J., Ito, M., Deguchi, H., Sato, T., Hasebe, M
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Journal Title
Evol. Dev 10, 2
Pages: 176-186
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Origins of the secondary plastids of Euglenophyta and2007
Author(s)
Takahashi, F., Okabe, Y., Nakada, T., Sekimoto, H., Ito, M., Kataoka, H., Nozaki, H
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Journal Title
Chlorarachniophyta as revealed by an analysis of the plastid-targeting nuclear-encoded gene psbO.J. Phycol 43
Pages: 1302-1309
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Expression patterns of class I KNOX and YABBY genes in Ruscus aculeatus (Asparagaceae) with implication for phylloclade homology2007
Author(s)
Hirayama, Y., Yamada, T., Oya, Y., Ito, M., Kato, M., Imaichi, R
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Journal Title
Dev. Genes Evol 217
Pages: 363-372
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Gene expression profiling using cDNA microarray analysis of the sexual reproduction stage of the unicellular charophycean alga Closterium peracerosum-strigosum-littorale complex2006
Author(s)
Sekimoto, H., Tanabe, Y., Tsuchikane, Y., Shirosaki, H., Fukuda, H., Demura, T., Ito, M
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Journal Title
Plant Physiol 141
Pages: 271-279
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Establishment of gene introduction system and analysis of cellular localization of the gene products in Closterium peracerosum-strigosum-littorale complex2007
Author(s)
Abe, J., Hori, S., Hiwatashi, Y. Hasebe, M., Ito, M., Sekimoto, H
Organizer
The Botanical Society of Japan
Place of Presentation
Noda, Japan
Year and Date
20070900
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Cloning and molecular analysis of knox gene in Closterium peracerosum-strigosum-littorale complex2007
Author(s)
Sekimoto, H., Sakamoto, K., Tanabe, Y., Abe, J., Ito, M
Organizer
The Botanical Society of Japan
Place of Presentation
Noda, Japan
Year and Date
20070900
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Analysis of sexual reproduction of homothallic Closterium peracerosum-strigosum-littorale complex (Conjugatophyceae)2007
Author(s)
Tsuchikane, Y., Ootaki, T., Nakahara, C., Sato, M., Nozaki, H., Ito, M. Sekimoto, H
Organizer
The Botanical Society of Japan
Place of Presentation
Noda, Japan
Year and Date
20070900
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Transformation of Closterium peracerosum-strigosum-littorale complex by particle bombardment2006
Author(s)
Abe, J., Hiwatashi, Y., Sakayori, K., Ito, M., Hasebe, M., Sekimoto, H
Organizer
The Botanical Society of Japan
Place of Presentation
Kumamoto, Japan
Year and Date
20060900
Description
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