ROLE OF ETHYLENE IN LEAF ABSCISSION

Abstract

Abscission zone explants of Gossypium hirsutum L., Cassia fistula L., and Coleus blumei Benth. were used to investigate correlations between endogenous rates of ethylene evolution and time of abscission. Additions of 0.1 nanoliter per milliliter ethylene to the explants, markedly accelerated abscission; continuous aeration of the explants, to prevent accumulation of small amounts of endogenously produced ethylene, inhibited abscission compared with that of sealed controls. Sustances that stimulated abscission simultaneously accelerated ethylene evolution on all three species and at any position of application. The positional effects of auxin are explained as being due to differences in transport in the explant. Thus, distally applied auxin inhibits abscission regardless of the accelerated rate of ethylene evolution by being rapidly transported to the abscission zone. Auxin applied proximally stimulates abscission because it is unable to move as rapidly to the abscission zone and the ethylene effect becomes dominant.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1966
Accession Number
AD0484226

Entities

People

  • Bernard Rubinstein
  • Frederick B. Abeles

Tags

Communities of Interest

  • C4I

DTIC Thesaurus Topics

  • Aeration
  • Alkenes
  • Amino Acids
  • California
  • Carbon Dioxide
  • Chemical Synthesis
  • Chemistry
  • Ethylenes
  • Growth Substances
  • Heterocyclic Acids
  • Inhibition
  • Literature
  • Personal Information Managers
  • Phenoxyacetic Acids
  • Transport Ships
  • United States
  • Vegetables

Fields of Study

  • Environmental science

Readers

  • Cellular and Molecular Pathways of Apoptosis.
  • Forest Ecology
  • Organic Chemistry