A mathematical model of phloem sucrose transport as a new tool for designing rice panicle structure for high grain yield

Motohide Seki, François Gabriel Feugier, Xian Jun Song, Motoyuki Ashikari, Haruka Nakamura, Keiki Ishiyama, Tomoyuki Yamaya, Mayuko Inari-Ikeda, Hidemi Kitano, Akiko Satake

研究成果: Contribution to journalArticle査読

17 被引用数 (Scopus)

抄録

Rice (Oryza sativa) is one of the most important food crops in the world. Numerous quantitative trait loci or genes controlling panicle architecture have been identified to increase grain yield. Yet grain yield, defined as the product of the number of well-ripened grains and their weight, is a complex trait that is determined by multiple factors such as source, sink and translocation capacity. Mechanistic modelling capturing capacities of source, sink and transport will help in the theoretical design of crop ideotypes that guarantee high grain yield. Here we present a mathematical model simulating sucrose transport and grain growth within a complex phloem network. The model predicts that the optimal panicle structure for high yield shows a simple grain arrangement with few higher order branches. In addition, numerical analyses revealed that inefficient delivery of carbon to panicles with higher order branches prevails regardless of source capacity, indicating the importance of designing grain arrangement and phloem structure. Our model highlights the previously unexplored effect of grain arrangement on the yield, and provides numerical solutions for optimal panicle structure under various source and sink capacities.

本文言語英語
ページ(範囲)605-619
ページ数15
ジャーナルPlant and Cell Physiology
56
4
DOI
出版ステータス出版済み - 4 2015
外部発表はい

All Science Journal Classification (ASJC) codes

  • 生理学
  • 植物科学
  • 細胞生物学

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