Possible Role of Hexosamine-Containing Cell Wall Component in Growth Regulation of Rice Coleoptiles

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概要

• 論文の詳細を見る

• The cell wall of rice coleoptile was found to contain several hundred microgram hexosamine per gram dry wt with the pectic, hemicellulosic, and α-cellulose fractions containing 50%, 40% and 10% respectively. The cell wall hexosamine content increased severalfold with coleoptile growth and was higher in air-type coleoptiles (grown on the surface of water) than water-type ones (grown under water). Rice coleoptiles were cultured in glucosamine, NH_4^+, glutamine, or asparagine solution and growth was inhibited at 10^<-4> M and above. Coleoptile growth capacity in glucosamine or NH_4^+ solution correlated inversely with the cell wall hexosamine content. Both of these solutions also inhibited elongation of submerged air-type coleoptile sections. Azaserine promoted the growth of both intact and excised coleoptiles at 10^<-6> to 10^<-5> M and halved the cell wall hexosamine content of intact ones. 6-Diazo-5-oxo-L-norleucine promoted the elongation of sections. These results suggest that the hexosamine-containing cell wall component is an important growth suppression factor in rice coleoptiles.

• 日本植物生理学会の論文

著者

• HOSON Takayuki

  Department of Biology, Faculty of Science, Osaka City University

• Hoson Takayuki

  Department Of Biological Sciences Graduate School Of Science Osaka City University

• Wada Shunji

  Biology Laboratory, Kyoritsu Women's University

• Wada Shunji

  Biological Inslitute Faculty Of Science Tohoku University

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