Opposite extremes in ethylene/nitric oxide ratio induce cell death in suspension culture and root apices of tomato exposed to salt stress

P. Poór, P. Borbély, Judit Kovács, Anita Papp, Ágnes Szepesi, Z. Takács, I. Tari

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The plant hormone ethylene or the gaseous signalling molecule nitric oxide (NO) may enhance salt stress tolerance by maintaining ion homeostasis, first of all K+/Na+ ratio of tissues. Ethylene and NO accumulation increased in the root apices and suspension culture cells of tomato at sublethal salt stress caused by 100 mM NaCl, however, the induction phase of programmed cell death (PCD) was different at lethal salt concentration. The production of ethylene by root apices and the accumulation of NO in the cells of suspension culture did not increase during the initiation of PCD after 250 mM NaCl treatment. Moreover, cells in suspension culture accumulated higher amount of reactive oxygen species which, along with NO deficiency contributed to cell death induction. The absence of ethylene in the apical root segments and the absence of NO accumulation in the cell suspension resulted in similar ion disequilibrium, namely K+/Na+ ratio of 1.41 ± 0.1 and 1.68 ± 0.3 in intact plant tissues and suspension culture cells, respectively that was not tolerated by tomato.

Original languageEnglish
Pages (from-to)428-438
Number of pages11
JournalActa Biologica Hungarica
Volume65
Issue number4
DOIs
Publication statusPublished - 2014

Fingerprint

Ethylene Oxide
Cell death
nitric oxide
Lycopersicon esculentum
Cell culture
ethylene
Suspensions
Nitric Oxide
Cell Death
Salts
salt
Cell Culture Techniques
Ions
Tissue
Salt-Tolerance
Plant Growth Regulators
ion
homeostasis
disequilibrium
hormone

Keywords

  • Ethylene
  • Ionic homeostasis
  • Programmed cell death
  • Root apex and cell suspension
  • Salt stress

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Environmental Science(all)
  • Neurology
  • Medicine(all)

Cite this

Opposite extremes in ethylene/nitric oxide ratio induce cell death in suspension culture and root apices of tomato exposed to salt stress. / Poór, P.; Borbély, P.; Kovács, Judit; Papp, Anita; Szepesi, Ágnes; Takács, Z.; Tari, I.

In: Acta Biologica Hungarica, Vol. 65, No. 4, 2014, p. 428-438.

Research output: Contribution to journalArticle

Poór, P. ; Borbély, P. ; Kovács, Judit ; Papp, Anita ; Szepesi, Ágnes ; Takács, Z. ; Tari, I. / Opposite extremes in ethylene/nitric oxide ratio induce cell death in suspension culture and root apices of tomato exposed to salt stress. In: Acta Biologica Hungarica. 2014 ; Vol. 65, No. 4. pp. 428-438.
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