Salicylic acid increased aldose reductase activity and sorbitol accumulation in tomato plants under salt stress

I. Tari, G. Kiss, A. K. Deér, J. Csiszár, L. Erdei, A. Gallé, K. Gémes, F. Horváth, P. Poór, A. Szepesi, L. M. Simon

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Increased aldose reductase (ALR) activities were detected in the leaf tissues of tomato plants grown for 3 weeks in culture medium containing 10-7 or 10-4 M salicylic acid (SA), and in the roots after the 10-4 M SA pretreatment. The ALR activity changed in parallel with the sorbitol content in the leaves of the SA-treated plants. Salt stress elicited by 100 mM NaCl enhanced the accumulation of sorbitol in the leaves of control plants and as compared with the untreated control the sorbitol content in the SA-pretreated leaves remained elevated under salt stress. DEAE cellulose anionexchange column purification of the protein precipitated with 80 % (NH4)2SO4 revealed two enzyme fractions with ALR activity in both the leaf and the root tissues. The fraction of the leaf extract that was not bound to the column reacted with glucose and glucose-6-P as substrates, whereas glucose was not a substrate for the bound fraction or for root isoenzymes. The root enzyme was less sensitive to salt treatment: 50 mM NaCl caused 30 % inhibition in the leaf extract, whereas the enzyme activity of the root extract was not affected. It is suggested that increased ALR activity and sorbitol synthesis in the leaves of SA-treated tomato plants may result in an improved salt stress tolerance.

Original languageEnglish
Pages (from-to)677-683
Number of pages7
JournalBiologia Plantarum
Volume54
Issue number4
DOIs
Publication statusPublished - 2010

Fingerprint

aldehyde reductase
sorbitol
salicylic acid
salt stress
tomatoes
leaves
leaf extracts
glucose
enzymes
stress tolerance
isozymes
cellulose
pretreatment
culture media
enzyme activity
salts
synthesis
extracts

Keywords

  • alterations of ALR activity in vitro
  • enzyme purification
  • Lycopersicon esculentum
  • NaCl

ASJC Scopus subject areas

  • Plant Science
  • Horticulture

Cite this

Salicylic acid increased aldose reductase activity and sorbitol accumulation in tomato plants under salt stress. / Tari, I.; Kiss, G.; Deér, A. K.; Csiszár, J.; Erdei, L.; Gallé, A.; Gémes, K.; Horváth, F.; Poór, P.; Szepesi, A.; Simon, L. M.

In: Biologia Plantarum, Vol. 54, No. 4, 2010, p. 677-683.

Research output: Contribution to journalArticle

Tari, I. ; Kiss, G. ; Deér, A. K. ; Csiszár, J. ; Erdei, L. ; Gallé, A. ; Gémes, K. ; Horváth, F. ; Poór, P. ; Szepesi, A. ; Simon, L. M. / Salicylic acid increased aldose reductase activity and sorbitol accumulation in tomato plants under salt stress. In: Biologia Plantarum. 2010 ; Vol. 54, No. 4. pp. 677-683.
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