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Apical localization of 1-aminocyclopropane-1-carboxylic acid and its conversion to ethylene in etiolated pea seedlings

Research output: Contribution to journalJournal article

Published

  • Jane E Taylor
  • Deborah A Grosskopf
  • Brian A McGaw
  • Roger Horgan
  • Ian A Scott
Journal publication date04/1988
JournalPlanta
Journal number1
Volume174
Number of pages3
Pages112-114
Original languageEnglish

Abstract

The biosynthetic basis for the high rates of ethylene production by the apical region of etiolated pea (Pisum sativum L.) seedlings was investigated. The ethylene precursor 1-aminocyclopropane-1-carboxylic acid (ACC) was quantified in extracts of various regions of seedlings by measuring isotopic dilution of a 2H-labelled internal standard using selected-ion-monitoring gas chromatography/mass spectrometry. The ACC levels in the apical hook and leaves were much higher than in the expanded internodes of the epicotyl. The capacity of excised tissue sections to convert exogenous ACC to ethylene was also much greater in the apical region, reflecting the distribution of soluble protein in the epicotyl.