The effect of difluoromethylornithine on polyamine levels in pollinated and napthaleneacetic acid-induced young tomato fruits

M. Egea-Cortines, Y. Mizrahi

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

The polyamine synthesis inhibitor difluoromethylornithine (DFMO) inhibits growth and cell division in tomato fruits (Lycopersicon esculentum Mill. c.v. F 121) when applied after pollination by the split-stem technique. In napthaleneacetic acid (NAA)-induced fruits, however, growth is not inhibited by DFMO. We analyzed the effect of DFMO on cell division in auxin induced tomato fruits, and on the concentration of free, soluble conjugated and insoluble bound polyamines in pollinated and NAA-induced fruits, five days after pollination in the presence and absence of DFMO. Cell number was not significantly reduced by DFMO in NAA-induced fruits five days after fruit set. Free spermine, soluble conjugated and insoluble bound polyamines were higher in fruits treated with DFMO than in those treated with water. They were also higher in DFMO-treated pollinated fruits than in NAA-induced ones. Our results suggest that inhibition of cell division by polyamine synthesis inhibitor might affect further metabolism of polyamines.

Original languageEnglish
Pages (from-to)287-292
Number of pages6
JournalPlant Growth Regulation
Volume12
Issue number3
DOIs
StatePublished - 1 Feb 1993

Keywords

  • Lycopersicon esculentum
  • auxin
  • cell division
  • difluoromethylornithine
  • fruit set
  • naphthaleneacetic acid
  • polyamine conjugates

ASJC Scopus subject areas

  • Physiology
  • Agronomy and Crop Science
  • Plant Science

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