2013 Fiscal Year Final Research Report
Elucidation of carbon/nitrogen balance signal transduction system via plant hormones
| Project Area | Comprehensive studies of plant responses to high CO2 world by an innovative consortium of ecologists and molecular biologists |
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| Project/Area Number |
21114005
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| Research Category |
Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
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| Allocation Type | Single-year Grants |
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| Review Section |
Biological Sciences
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| Research Institution | The Institute of Physical and Chemical Research |
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Principal Investigator |
SAKAKIBARA HITOSHI 独立行政法人理化学研究所, 環境資源科学研究センター, グループディレクター (20242852)
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| Co-Investigator(Kenkyū-buntansha) |
KIBA Takatoshi 独立行政法人理化学研究所, 環境資源科学研究センター, 研究員 (20532097)
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| Co-Investigator(Renkei-kenkyūsha) |
KAMADA-NOBUSADA Tomoe 独立行政法人理化学研究所, 環境資源科学研究センター, 研究員 (90390690)
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| Research Collaborator |
KOJIMA Mikiko 独立行政法人理化学研究所, 環境資源科学研究センター, 技師
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| Project Period (FY) |
2009-07-23 – 2014-03-31
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| Keywords | 光合成 / 二酸化炭素 / 植物ホルモン / 窒素栄養 / 遺伝子発現 |
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| Research Abstract |
We have demonstrated that enhanced production of trans-zeatin is a key factor to facilitate the shoot growth in response to high CO2 condition. IPT3 and CYP735A2 are regulated by CO2 concentration mediated by sugars produced from photosynthesis. We have demonstrated that the physiological function of tZ is distinct from that of iP, and the trans-hydroxylation of cytokinin controls shoot growth in Arabidopsis.
We have shown that plants have multiple modes of regulation of de novo cytokinin synthesis in response to nitrogen status: Arabidopsis mainly uses nitrate-specific response system that regulates IPT3, and rice employs multiple IPT genes for nitrogen-dependent cytokinin synthesis, and glutamine metabolism is the signal for the regulation. In both cases, these regulations would be important for root-to-shoot supply of tZ via xylem for regulation of shoot growth.
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[Journal Article] Arabidopsis ABCG14 is essential for the root-to-shoot translocation of cytokinin2014
Author(s)
Ko, D., Kang, J., Kiba, T., Park, J., Kojima, M., Do, J., Kim, K.Y., Kwon, M., Endler, A., Song, W.Y., Martinoia, E., Sakakibara, H. and Lee, Y.
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Journal Title
Proceedings of National Academy of Science U.S.A.
Volume: 111
Pages: 7150-7155
DOI
Peer Reviewed
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[Journal Article] High CO_2 triggers preferential root growth of Arabidopsis thaliana via two distinct systems under low pH and low N stresses2014
Author(s)
Hachiya, T. Sugiura, D., Kojima, M., Sato, S., Yanagisawa, S., Sakakibara, H., Terashima, I., and Noguchi, K.
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Journal Title
Plant and Cell Physiology
Volume: 55
Pages: 269-280
DOI
Peer Reviewed
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[Journal Article] Arabidopsis lonely guy (LOG) multiple mutants reveal a central role of the LOG-dependent pathway in cytokinin activation2012
Author(s)
Tokunaga,H., Kojima, M., Kuroha, T., Ishida, T., Sugimoto, K., Kiba, T. and Sakakibara, H.
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Journal Title
Plant Journal
Volume: 69
Pages: 355-365
DOI
Peer Reviewed
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[Journal Article] The Arabidopsis nitrate transporter NRT2.4 plays a double role in roots and shoots of nitrogen-starved plants2012
Author(s)
Kiba, T., Feria-Bourrellier, A.-B., Lafouge, F., Lezhneva, L., Boutet-Mercey, S., Orsel, M., Brehaut, V., Miller, A., Daniel-Vedele, F., Sakakibara, H. and Krapp, A.
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Journal Title
Plant Cell
Volume: 24
Pages: 245-258
DOI
Peer Reviewed
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[Journal Article] Interaction between a plasma membrane-localized ankyrin-repeat protein ITN1 and a nuclear protein RTV12012
Author(s)
Sakamoto, H., Sakata, K., Kusumi, K., Kojima, M., Sakakibara, H. and Iba, K.
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Journal Title
Biochemistry Biophysics Research CommunicationBiochemistry Biophysics Research Communication
Volume: 423
Pages: 392-397
DOI
Peer Reviewed
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[Journal Article] Suppression of α-amylase genes improves quality of rice grain ripened under high temperature2012
Author(s)
Hakata, M., Kuroda, M., Miyashita, T., Yamaguchi, T., Kojima, M., Sakakibara, H., Mitsui, T. and Yamakawa, H.
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Journal Title
Plant Biotechnology Journal
Volume: 10
Pages: 1110-1117
DOI
Peer Reviewed
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[Journal Article] Phloem-transported cytokinin regulates polar auxin transport and maintains vascular pattern in the root meristem2011
Author(s)
Bishopp, A., Lehesranta, S., Vaten, A., Help, H., El-Showk, S., Scheres, B., Helariutta, K., Mahonen, A. P., Sakakibara, H. and Helariutta, Y.
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Journal Title
Current Biology
Volume: 21
Pages: 927-932
DOI
Peer Reviewed
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[Journal Article] Environmental regulation of stomatal response in the Arabidopsis Cvi-0 ecotype2011
Author(s)
Monda, K., Negi, J., Iio, A., Kusumi, K., Kojima, M., Hashimoto, M., Sakakibara, H. and Iba, K.
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Journal Title
Planta
Volume: 234
Pages: 555-563
DOI
Peer Reviewed
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