Interspecific Difference in Growth Perenniality in Rice Cultivars, Oryza sativa L. and O. glaberrima Steud

Teruhiko Kawahara, Fumitake Kubota, Kenji Hirao, Kazuyuki Saitou, Waichi Agata

研究成果: ジャーナルへの寄稿記事

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Of the two rice cultivar species, Oryza sativa and O. glaberrima, the former was predicted as a species with a higher potential in growth perenniality compared to the latter in a previous paper. In this paper we made a further study to confirm the specific difference in growth perenniality by comparing the growth characteristics, leaf photosynthesis and photosynthate partitioning in a plant at the post-heading stage. O. glaberrima was characterized by quick accumulation of photosynthate in the panicles. The simple morphological formation of rachis branching of O. glaberrima is thought to allow the smooth transportation of photosynthate from leaves to chaffs of a panicle and the early maturation. Such a feature as observed in O. glaberrima is regarded as an advantageous character for the seed production in annual plants. The photosynthate partition among different organs was monitored by the 13C trace method. The culm base of O. sativa accumulated several-fold more 13C than that of O. glaberrima. The accumulated photosynthate is available as energy resource for initiation of the regenerative growth by ratooning, and the species having a large amount of the accumulation can keep a high potential of growth perenniality.

元の言語英語
ページ(範囲)315-323
ページ数9
ジャーナルJournal of the Faculty of Agriculture, Kyushu University
42
発行部数3-4
出版物ステータス出版済み - 3 1 1998

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All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Agronomy and Crop Science

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