Browse

Modulation of reactive oxygen species by salicylic acid in arabidopsis seed germination under high salinity

Cited 0 time in Web of Science Cited 31 time in Scopus
Authors
Lee, S.; Park, Chung-Mo
Issue Date
2010-12
Citation
Plant Signaling and Behavior, Vol.5 No.12, pp.1534-1536
Keywords
ArabidopsisGibberellic acid (GA)Reactive oxygen species (ROS)Salicylic acid (SA)Salt stressSeed germination
Abstract
Potential roles of salicylic acid (SA) on seed germination have been explored in many plant species. However, it is still controversial how SA regulates seed germination, mainly because the results have been somewhat variable, depending on plant genotypes used and experimental conditions employed. We found that SA promotes seed germination under high salinity in Arabidopsis. Seed germination of the sid2 mutant, which has a defect in SA biosynthesis, is hypersensitive to high salinity, but the inhibitory effects are reduced in the presence of physiological concentrations of SA. Abiotic stresses, including high salinity, impose oxidative stress on plants. Endogenous contents of H2O2 are higher in the sid2 mutant seeds. However, exogenous application of SA reduces endogenous level of reactive oxygen species (RO S), indicating that SA is involved in plant responses to RO S-mediated damage under abiotic stress conditions. Gibberellic acid (GA), a plant hormone closely associated with seed germination, also reverses the inhibitory effects of high salinity on seed germination and seedling establishment. Under high salinity, GA stimulates SA biosynthesis by inducing the SID2 gene. Notably, SA also induces genes encoding GA biosynthetic enzymes. These observations indicate that SA promotes seed germination under high salinity by modulating antioxidant activity through signaling crosstalks with GA. © 2010 Landes Bioscience.
ISSN
1559-2316
URI
https://hdl.handle.net/10371/172076
DOI
https://doi.org/10.4161/psb.5.12.13159
Files in This Item:
There are no files associated with this item.
Appears in Collections:
College of Natural Sciences (자연과학대학)Dept. of Chemistry (화학부)Journal Papers (저널논문_화학부)
  • mendeley

Items in S-Space are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse