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2004 Fiscal Year Final Research Report Summary

Nitrogen Recycling System Analyzed by Molecular Physiology together with QTL Analysis in Rice

Research Project

Project/Area Number 14360035
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Plant nutrition/Soil science
Research InstitutionTohoku University

Principal Investigator

YAMAYA Tomoyuki  Tohoku University, Graduate School of Agricultural Science, Professor, 大学院・農学研究科, 教授 (30144778)

Co-Investigator(Kenkyū-buntansha) SATO Tadashi  Tohoku University, Graduate School of Life Science, Associate Professor, 大学院・生命科学研究科, 助教授 (40134043)
Project Period (FY) 2002 – 2004
Keywordsrice / QTL Analysis / Nitrogen Recycling / Chromosome-substituted lines / Panicle Weight / Tiller / Glutamine Svnthetase / DNA Markers
Research Abstract

A quantitative trait locus (QTL) associated with the protein content of cytosolic glutamine synthetase (GS1 ; EC 6.3.1.2) in senescing leaves, panicle number and panicle weight was characterized in rice (Oryza sativa L.). A nearly isogenic line (NIL), C-22, developed by marker-assisted selection was grown under different nitrogen levels in a greenhouse and in a paddy field. C-22 had a small segment (approximately 50 cM) substituted from the Kasalath chromosome in chromosome 2 on a Koshihikari genetic background. C-22 showed a 12-37% lower content of GS1 protein in leaf blades than Koshihikari, which was in good agreement with a QTL region positively affected by the japonica chromosome. At an early vegetative stage, C-22 had more active tillers than Koshihikari in the greenhouse. At the reproductive stage, both panicle number and total panicle weight of C-22 were significantly higher than those of Koshihikari, particularly when grown with a low-nitrogen condition. These traits of C-22 were further confirmed in a paddy field. Thus, development of tillers was positively affected by the Kasalath chromosome at an early vegetative stage, which increased the panicle number and panicle weight at the mature stage in C-22. These data indicate that the target QTL (Pnn1 ; panicle number 1) is important in the development of tillers and panicles in rice. Pnn1 was delimited at the 6.7 cM region, demonstrating that developing tiller formation in the 2nd axil (RDT ; ratio of developing tillers formation in the 2nd axil) was determined using substituted lines. This QTL region has been successively narrowed down to 23 kb using various substituted lines of Kasalath chromosome.
Physiological function of GS1 ; 1 has been investigated using knock-out mutants of GS1 ; 1 gene and this result will be published in Plant Journal. In addition, function of PII-like protein that would be expected to be involved in the Gln signaling has also been published.

  • Research Products

    (10 results)

All 2005 2004

All Journal Article (10 results)

  • [Journal Article] Sever reduction in growth rate and grain filling of rice mutants lacking OsGS1;1, a cytosolic glutamine synthetase 1;1 gene2005

    • Author(s)
      Tabuchi, M. et al.
    • Journal Title

      Plant Journal (in press)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Sever reduction in growth rate and grain filling of rice mutants laking OsGSL ; 1 gene, a cytozolic glutamine synthetase 1;1.2005

    • Author(s)
      Tabuchi, M. et al.
    • Journal Title

      Plant Journal (in press)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Identification of quantitative trait loci for plant growth of rice in paddy field flooded with salt water2004

    • Author(s)
      Takehisa, H. et al.
    • Journal Title

      Field Crops Research 89

      Pages: 85-95

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Identification and characterization of QTL on chromosome 2 for cytosolic glutamine synthetase content and panicle number in rice (Oryza sativa L.)2004

    • Author(s)
      Obara M. et al.
    • Journal Title

      Theoretical Applied Genetics 110

      Pages: 1-11

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Interaction of acetylglutamate kinase with a PII-like protein in rice2004

    • Author(s)
      Sugiyama, K. et al.
    • Journal Title

      Plant Cell Physiology 45

      Pages: 1768-1778

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Biochemical backgrounds of compartmentalized functions of cytosolic glutamine synthetase for active ammonium assimilation in rice roots2004

    • Author(s)
      Ishiyama K. et al.
    • Journal Title

      Plant Cell Physiology 45

      Pages: 1640-1647

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Kinetic properties and ammonium-dependent regulation of cytosolic isoenzymes of glutamine synthetases in Arabidopsis2004

    • Author(s)
      Ishiyama K. et al.
    • Journal Title

      Journal of Biological Chemistry 279

      Pages: 16598-16605

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Identification and characterization of QTL on chromosome 2 for cytosolic glutamine synthetase content and panicle number in rice(Oryza sativa L.)2004

    • Author(s)
      Obara M. et al.
    • Journal Title

      Theoretical Applied Genetics 110

      Pages: 1-11

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Biochemical background of compartmentalized functions of cytosolic glutamine synthetase for active ammonium assimilation in rice roots2004

    • Author(s)
      Ishiyama K. et al.
    • Journal Title

      Plant Cell Physiology 45

      Pages: 1640-1647

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Kinetic properties and ammonium-dependent regulation of cytosolic isoenzymes of glutamine synthetases in Arabidopsis.2004

    • Author(s)
      Ishiyama K. et al.
    • Journal Title

      Journal of Biological Chemistry 279

      Pages: 16598-16605

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2006-07-11  

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