Effect of CO_2 Enrichment on the Translocation and Partitioning of Carbon at the Early Grain-filling Stage in Rice (Oryza sativa L.)

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Author(s)

    • SASAKI Haruto
    • Graduate School of Agriculture and Life Sciences, University of Tokyo
    • AOKI Naohiro
    • Department of Plant Physiology, National Institute of Agrobiological Resources
    • HARA Takahiro
    • Graduate School of Agriculture and Life Sciences, University of Tokyo
    • UEHARA Naoko
    • Graduate School of Agriculture and Life Sciences, University of Tokyo
    • ISHIMARU Ken
    • Department of Plant Physiology, National Institute of Agrobiological Resources

Abstract

Rice plants (<I>Oryza sativa</I> L.) were grown under normal (350 μL L<SUP>-1</SUP> CO<SUB>2</SUB>) and CO<SUB>2</SUB>-enriched (660 μL L<SUP>-1</SUP> CO<SUB>2</SUB>) conditions, and <SUP>13</SUP>CO<SUB>2</SUB> was supplied to the rice plants after heading to examine the translocation and partitioning of photosynthate at the early grain-filling stage. At 2 days after supplying <SUP>13</SUP>CO<SUB>2</SUB>, no difference in the <SUP>13</SUP>C content of the whole plant was observed between the plants grown under normal and CO<SUB>2</SUB>-enriched conditions, but translocation of <SUP>13</SUP>C from the leaf blade to other plant organs seemed to be accelerated by CO<SUB>2</SUB> enrichment. Up to 9 days after supplying, <SUP>13</SUP>CO<SUB>2</SUB> fixed into sucrose was mainly used to synthesize starch in the stem rather than translocated to the ear in plants grown under normal conditions. In contrast, the supplied <SUP>13</SUP>C was rapidly translocated to the ear, and <SUP>13</SUP>C stored as starch in the stem was also translocated to the ear in plants grown under CO<SUB>2</SUB>-enriched conditions. Therefore, we concluded that CO<SUB>2</SUB> enrichment accelerated the translocation of carbohydrates to the ear.

Journal

  • Plant Production Science

    Plant Production Science 8(1), 8-15, 2005-03-01

    The Crop Science Society of Japan

References:  26

Cited by:  2

Codes

  • NII Article ID (NAID)
    110001720821
  • NII NACSIS-CAT ID (NCID)
    AA11162156
  • Text Lang
    ENG
  • Article Type
    Journal Article
  • ISSN
    1343943X
  • Data Source
    CJP  CJPref  NII-ELS  J-STAGE 
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