Biologia Plantarum

, Volume 51, Issue 3, pp 480–487

Exogenous 4-hydroxybenzoic acid and salicylic acid modulate the effect of short-term drought and freezing stress on wheat plants

Authors

  • E. Horváth
    • Agricultural Research Institute of the Hungarian Academy of Sciences
  • M. Pál
    • Agricultural Research Institute of the Hungarian Academy of Sciences
  • G. Szalai
    • Agricultural Research Institute of the Hungarian Academy of Sciences
  • E. Páldi
    • Agricultural Research Institute of the Hungarian Academy of Sciences
    • Agricultural Research Institute of the Hungarian Academy of Sciences
Original Papers

DOI: 10.1007/s10535-007-0101-1

Cite this article as:
Horváth, E., Pál, M., Szalai, G. et al. Biol Plant (2007) 51: 480. doi:10.1007/s10535-007-0101-1

Abstract

Exogenous salicylic acid has been shown to confer tolerance against biotic and abiotic stresses. In the present work the ability of its analogue, 4-hydroxybenzoic acid to increase abiotic stress tolerance was demonstrated: it improved the drought tolerance of the winter wheat (Triticum aestivum L.) cv. Cheyenne and the freezing tolerance of the spring wheat cv. Chinese Spring. Salicylic acid, however, reduced the freezing tolerance of Cheyenne and the drought tolerance of Chinese Spring, in spite of an increase in the guaiacol peroxidase and ascorbate peroxidase activity. The induction of cross tolerance between drought and freezing stress was observed: drought acclimation increased the freezing tolerance of Cheyenne plants and cold acclimation enhanced the drought tolerance. The induction of drought tolerance in Cheyenne was correlated with an increase in catalase activity.

Additional key words

antioxidant activitychlorophyll fluorescence inductionlow temperaturewater stress

Abbreviations

APX

ascorbate peroxidase

CAT

catalase

Chl

chlorophyll

Fm

maximal fluorescence

Fv

variable fluorescence

GPX

guaiacol peroxidase

GR

glutathione reductase

4-HBA

4-hydroxybenzoic acid

PAL

phenylalanine ammonialyase

PEG

polyethylene glycol

PPFD

photosynthetic photon flux density

PR

pathogenesis-related

PS 2

photosystem 2

SA

salicylic acid

SAR

systemic acquired resistance

Copyright information

© Institute of Experimental Botany, ASCR 2007