Analysis of the Change of Amino Acids by Abscisic acid and Polyamine Treatment in Radish Young Cotyledons

무우 유식물의 자엽에서 Abscisic acid와 Polyamine 처리에 의한 아미노산 변화의 분석

  • Received : 1999.04.07
  • Published : 1999.10.25

Abstract

The changes of amino acids in the cotyledons of spring - and winter radishes were analysed during the abscisic acid (ABA). ABA plus cycloheximide (CH) and ABA plus polyamine (PA) treatment. The total contents of amino acids were increased in spring radishes, and decreased in winter radishes by ABA. The contents of hydrophilic amino acids, proline, glycine, serine and cysteine in spring radishes (expecially proline), and of cysteine, leucine and phenylalanine in winter radishes (expecially cysteine and leucine)were increased, CH treatment resulted in the accumulation of amino acids by the inhibition of new synthesized protein, which synthesized against ABA induced dehydration both of radishes. On the contrary, the contents of amino acids were decreased in spring radishes, and increased in winter radishes during PA treatment. These results indicated that the accumulated hydrophilic amino acids and new synthesized proteins induced the adaptation of dehydration against stress and the role of ABA in accelerating of stress adaptation was mediated by polyamines.

Keywords

amino acids;abseisic acid;polyamine;radish

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Acknowledgement

Supported by : 교육부 기초과학연구소