Polyamines, indole-3-acetic acid and abscisic acid in rice phloem sap

T. Yokota, M. Nakayama, I. Harasawa, M. Sato, M. Katsuhara, S. Kawabe

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Putrescine, spermidine, spermine and cadaverine have been identified and quantified in rice phloem sap and shoot extracts by HPLC. It is suggested that diamines, putrescine and cadaverine, easily migrate into the phloem, while movement of a triamine, spermidine, and a tetramine, spermine, tend to be restricted. Spermine especially seems to be the most immobile among polyamines. Thus it is indicated that movement of polyamines into phloem is decreased with increasing number of amino groups. Indole-3-acetic acid and abscisic acid in rice phloem sap were also analyzed by HPLC and it is suggested that indole-3-acetic acid is transported freely into phloem, while abscisic acid is much more actively exuded into phloem.

Original languageEnglish
Pages (from-to)125-128
Number of pages4
JournalPlant Growth Regulation
Issue number2
Publication statusPublished - Sep 1 1994



  • Oryza sativa
  • abscisic acid
  • auxin
  • phloem sap
  • polyamine
  • rice

ASJC Scopus subject areas

  • Physiology
  • Agronomy and Crop Science
  • Plant Science

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