Involvement of Cell Wall-Bound Diferulic Acid in Light-Induced Decrease in Growth Rate and Cell Wall Extensibility of Oryza Coleoptiles :

• Tan,Kah-Siew

  Department of Biology, Faculty of Science, Osaka City University

• Hoson,Takayuki

  Department of Biology, Faculty of Science, Osaka City University

• Masuda,Yoshio

  Department of Biology, Faculty of Science, Osaka City University

• Kamisaka,Seiichiro

  Department of Biology, Faculty of Science, Osaka City University

抄録

Irradiation of white fluorescent light (5 W m^<-2>) inhibited the growth of Oryza coleoptiles. Light irradiation increased stress-relaxation parameters of coleoptile cell walls, minimum stress-relaxation time and relaxation rate, and decreased cell wall extensibility (strain/load). Under light conditions, the contents of ferulic and diferulic acids ester-linked to the hemicellulosic arabinose residue in cell walls increased and correlated with the modification of the cell wall mechanical properties. These results suggest that light irradiation enhances the formation of diferulic acid bridges in hemicelluloses, making cell walls mechanically rigid and thus inhibits cell elongation in rice coleoptiles. Also, irrespective of coleoptile age or the presence of light, the ratio of diferulic acid to ferulic acid was almost constant, suggesting that the rate limiting step in the formation of diferulic acid bridges in Oryza cell walls is in the step of feruloylation.

収録刊行物

• Plant and cell physiology

  Plant and cell physiology 33 (2), 103-108,

  Japanese Society of Plant Physiologists

キーワード

• Cell wall extensibility
• Coleoptile
• Diferulic acid
• Ferulic acid
• Oryza
• White light

詳細情報

• CRID: 1542543045197528832
• NII論文ID: 110003720070
• NII書誌ID: AA0077511X
• Web Site: http://dl.ndl.go.jp/info:ndljp/pid/10770857
• 本文言語コード: en
• データソース種別:
  • NDL-Digital
  • CiNii Articles