2007 Fiscal Year Final Research Report Summary
Isolation and functional analyses of genes that regulate morphogenesis of rice
| Project/Area Number |
17208002
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Breeding science
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| Research Institution | The University of Tokyo |
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Principal Investigator |
HIRANO Hiro-Yuki The University of Tokyo, Graduate School of Science, Professor (00192716)
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| Project Period (FY) |
2005 – 2007
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| Keywords | morphogenesis / development / gene / spikelet / leaf / DROOOPING LEAF (DL) / rice / gene regulation |
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| Research Abstract |
In this project, we have aimed to understand molecular genetic mechanism of development and morphogenesis of rice, Oryza sativa.
(1) We have analyzed genetic and molecular function of C class MADS box gene that have multiple functions in regulating flower development. We revealed that the two C-class genes have been partially subfunctionalized during rice evolution (i. e., the functions regulated by AG have been partially partitioned into two paralogous genes
OSMADS3 and OSMADS58, which were produced by a recent gene duplication event in plant evolution).
(2) We cloned genes that regulate meristem maintenance in rice and revealed their functions in rice. In summary, the genetic pathway regulating meristem maintenance is fundamentally conserved in rice as that in Arabidopsis. We found that rice has additional pathways to regulate stem cell maintenance in addition to the conserved pathway.
(3) We analyzed the function of the DROOPING LEAF (DL) gene, which is involved in midrib formation and carpel specification. We found several genes upregulated by overexpression of DL, which may be involved in midrib formation. We also revealed that DL activity and the size of midrib are closely associated each other, confirming the previous hypothesis that DL promotes cell proliferation in the central region of leaf primordia, and that this cell proliferation is critical for midrib formation in the mature leaves.
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Research Products
(31 results)
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[Journal Article] A transposon, Ping, is integrated into intron 4 of the DROOPING LEAF gene of rice, weakly reducing its expression, and causing a mild drooping leaf phenotype.2008
Author(s)
Ohmori, Y., Abiko, M., Horibata, A., Hirano, H. -Y.
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Journal Title
Plant Cell Physiol. 49
Pages: 1176-1184
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Molecular characterization the YABBY gene family in Oryza sativa and expression analysis of OsYABBYl.2007
Author(s)
Toriba, T., Harada, K., Takamura, A., Nakamura, H., Ichikawa, H., Suzaki, T., Hirano, H. -Y.
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Journal Title
Mol. Genet. Genomics 277
Pages: 457-468
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Functional diversification of the two C-class genes, 0SMADS3 and OSMADS58, in Orvza sativa.2006
Author(s)
Yamaguchi, T., Lee, Y. D., Miyao, A., Hirochika, H., An, G., Hirano, H. -Y.
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Journal Title
Plant Cell 18
Pages: 15-28
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Conservation and diversification of meristem maintenance mechanism in Oryza sativa: function of the FLORAL ORGAN NUMBER2 gene2006
Author(s)
Suzaki, T., Toriba, T., Fujimoto, M., Tsutsumi, N., Kitano, H., Hirano, H. -Y.
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Journal Title
Plant Cell Physiol. 47
Pages: 1591-1602
Description
「研究成果報告書概要(欧文)」より
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