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Exogenous Salicylic Acid Modulates the Response to Combined Salinity-Temperature Stress in Pepper Plants (Capsicum annuum L. var. Tamarin)
- Source :
- Plants, Volume 9, Issue 12, Plants, Vol 9, Iss 1790, p 1790 (2020)
- Publication Year :
- 2020
- Publisher :
- MDPI, 2020.
-
Abstract
- Growers in the cultivated areas where the climate change threatens the agricultural productivity and livelihoods are aware that the current constraints for good quality water are being worsened by heatwaves. We studied the combination of salinity (60 mM NaCl) and heat shock stress (43 °C) in pepper plants (Capsicum annuum L. var. Tamarin) since this can affect physiological and biochemical processes distinctly when compared to separate effects. Moreover, the exogenous application of 0.5 mM salicylic acid (SA) was studied to determine its impacts and the SA-mediated processes that confer tolerance of the combined or stand-alone stresses. Plant growth, leaf Cl− and NO3− concentrations, carbohydrates, and polyamines were analyzed. Our results show that both salinity stress (SS) and heat stress (HS) reduced plant fresh weight, and SA only increased it for HS, with no effect for the combined stress (CS). While SA increased the concentration of Cl− for SS or CS, it had no effect on NO3−. The carbohydrates concentrations were, in general, increased by HS, and were decreased by CS, and for glucose and fructose, by SA. Additionally, when CS was imposed, SA significantly increased the spermine and spermidine concentrations. Thus, SA did not always alleviate the CS and the plant response to CS cannot be directly attributed to the full or partial sum of the individual responses to each stress.
- Subjects :
- 0106 biological sciences
0301 basic medicine
Spermine
Plant Science
01 natural sciences
Article
salinity
03 medical and health sciences
chemistry.chemical_compound
NaCl
extreme weather
lcsh:Botany
Pepper
Ecology, Evolution, Behavior and Systematics
Ecology
biology
food and beverages
temperature
Fructose
Tamarin
combined stress
biology.organism_classification
lcsh:QK1-989
Spermidine
Salinity
Capsicum annuum
Horticulture
030104 developmental biology
chemistry
heat shock stress
Salicylic acid
010606 plant biology & botany
Subjects
Details
- Language :
- English
- ISSN :
- 22237747
- Volume :
- 9
- Issue :
- 12
- Database :
- OpenAIRE
- Journal :
- Plants
- Accession number :
- edsair.doi.dedup.....8789ce3a721e3e3cba116d32bba348fe