ニホンナシ'二十世紀'が秋季に蓄積した <SUP>13</SUP>C 同化産物の翌春における転流

DOI NDLデジタルコレクション 日本農学文献記事索引 Web Site Web Site 被引用文献9件 参考文献27件

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タイトル別名
  • Translocation of 13C-Assimilates in the Spring Following Fall Assimilation of 13CO2 by 'Nijisseiki' Pear (Pyrus pyrifolia Nakai).
  • Translocation of 13C -Assimlates in the spring following fall assimilation of 13CO2 by ‘Nijisseiki’ pear (Pyrus pyrifola Nakai)

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抄録

Three-year-old 'Nijisseiki' pear (Pyrus pyrifolia Nakai) trees were treated twice with 13CO2 in October (fall). The distribution of labeled 13C within the tree during dormancy and remobilization in the following season were determined. After leaf-fall, about 63% of the total 13C recovered from the tree was distributed in the roots. At anthesis the 13C content from the previous season's organs showed a significant decrease : the aerial organs decreased by about 53% and the roots by nearly 60%. About 35% of the total 13C recovered from the trees after leaf-fall was consumed by respiration until anthesis. New shoot, flower, and root growth accounted for 8.5%, 9.9%, and 3.9% of the total 13C recovered from the tree after leaf-fall, respectively. One month after anthesis, the 13C remaining in the previous season's organs, had further decreased, having been exported to the new leaves and current shoots. The 13C remaining in the fruitlets dramatically decreased because of the abscission of sepals, petals, stamens, and partial pistils (style and stigma). New roots had the highest concentration of 13C among all new organs. These data suggest that root systems play a special role in the storage of carbohydrates in young pear trees. All organs depend on carbohydrate reserves for spring growth, especially new roots which seem to depend on reserves for a longer time.

収録刊行物

  • 園芸学会雑誌

    園芸学会雑誌 68 (2), 248-255, 1999

    一般社団法人　園芸学会

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