Organ size control in Arabidopsis: Insights from compensation studies

• Ferjani Ali

  Department of Biology, Faculty of Science, Tokyo Gakugei University

• Horiguchi Gorou

  Department of Life Science, College of Science, Rikkyo University

• Tsukaya Hirokazu

  Department of Biological Sciences, Graduate School of Science, The University of Tokyo National Institute for Basic Biology, National Institutes of Natural Sciences

抄録

Growth within plant aerial lateral organs, such as leaves and flowers, occurs for a given period of time and stops when the organs reach their final size and shape, which are highly reproducible for genetically identical organisms grown under equivalent environments. Although leaf size is at one level simply a function of cell number and size, accumulating evidence suggests that an organ-wide integration system underlies leaf organogenesis and controls leaf size. This system, which integrates cell proliferation and expansion, has been a topic of vigorous research in recent years. In our research, we have focused on the intriguing phenomenon known as "compensation." In mutants that have a severe decrease in cell number, excessive cell enlargement is induced post-mitotically; therefore, compensation itself underscores the link between cell number and size-control systems at the level of the entire organ. In a recent large-scale histologic study of mutants of the model plant Arabidopsis thaliana, we identified a large number of leaf-size mutants with various combinations of cell-number and cell-size phenotypes. Five of these mutants, fugu1-fugu5, exhibited compensation phenotypes. Here, we highlight the recent advances in our understanding of size control and the possible mechanisms of compensated cell enlargement based on our analysis of compensation-exhibiting mutants.

収録刊行物

• ＰＬＡＮＴ　ＭＯＲＰＨＯＬＯＧＹ

  ＰＬＡＮＴ　ＭＯＲＰＨＯＬＯＧＹ 22 (1), 65-71, 2010

  日本植物形態学会

キーワード

• <I>Arabidopsis thaliana</I>
• leaf size
• cell proliferation
• cell expansion
• compensation
• <I>fugu</I> mutants

詳細情報

• CRID: 1390282680334993024
• NII論文ID: 130000907590
• DOI: 10.5685/plmorphol.22.65
• ISSN: 18844154
• ISSN: 09189726
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可