Overexpression of the mitochondrial PPR40 gene improves salt tolerance in Arabidopsis

Laura Zsigmond, Ágnes Szepesi, Irma Tari, Gábor Rigó, Annamária Király, László Szabados

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

Mitochondrial respiration is sensitive to environmental conditions and can be influenced by abiotic stress. Previously we described the Arabidopsis mitochondrial pentatricopeptide repeat domain protein PPR40, and showed that the stress hypersensitive ppr40-1 mutant is compromised in mitochondrial electron transport (Zsigmond et al., 2008) [20]. Overexpression of the PPR40 gene in Arabidopsis resulted in enhanced germination and superior plant growth in saline conditions. Respiration increased in PPR40 overexpressing plants during salt stress. Reduced amount of hydrogen peroxide, diminished lipid peroxidation, lower ascorbate peroxidase and superoxide dismutase activity accompanied salt tolerance. Proline accumulation was enhanced in the ppr40-1 mutant, but unaltered in the PPR40 overexpressing plants. Our data suggest that PPR40 can diminish the generation of reactive oxygen species by stabilizing the mitochondrial electron transport and protecting plants via reducing oxidative damage during stress.

Original languageEnglish
Pages (from-to)87-93
Number of pages7
JournalPlant Science
Volume182
Issue number1
DOIs
Publication statusPublished - Jan 2012

Fingerprint

Salt-Tolerance
Mitochondrial Genes
salt tolerance
Arabidopsis
electron transfer
Electron Transport
mutants
Respiration
gene overexpression
genes
Ascorbate Peroxidases
ascorbate peroxidase
abiotic stress
salt stress
hydrogen peroxide
proline
reactive oxygen species
superoxide dismutase
lipid peroxidation
Germination

Keywords

  • Arabidopsis
  • Gene overexpression
  • Mitochondrion
  • PPR40
  • Reactive oxygen species
  • Salt tolerance

ASJC Scopus subject areas

  • Plant Science
  • Genetics
  • Agronomy and Crop Science

Cite this

Overexpression of the mitochondrial PPR40 gene improves salt tolerance in Arabidopsis. / Zsigmond, Laura; Szepesi, Ágnes; Tari, Irma; Rigó, Gábor; Király, Annamária; Szabados, László.

In: Plant Science, Vol. 182, No. 1, 01.2012, p. 87-93.

Research output: Contribution to journalArticle

Zsigmond, Laura ; Szepesi, Ágnes ; Tari, Irma ; Rigó, Gábor ; Király, Annamária ; Szabados, László. / Overexpression of the mitochondrial PPR40 gene improves salt tolerance in Arabidopsis. In: Plant Science. 2012 ; Vol. 182, No. 1. pp. 87-93.
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