Back to Search
Start Over
24-Epibrassinolide (EBR) Confers Tolerance against NaCl Stress in Soybean Plants by Up-Regulating Antioxidant System, Ascorbate-Glutathione Cycle, and Glyoxalase System.
- Source :
-
Biomolecules [Biomolecules] 2019 Oct 23; Vol. 9 (11). Date of Electronic Publication: 2019 Oct 23. - Publication Year :
- 2019
-
Abstract
- : The present research was performed to assess the effect of 24-epibrassinolide (EBR) on salt-stressed soybean plants. Salt stress suppressed growth, biomass yield, gas exchange parameters, pigment content, and chlorophyll fluorescence, but all these parameters were up-regulated by EBR supply. Moreover, salt stress increased hydrogen peroxide, malondialdehyde, and electrolyte leakage. EBR supplementation reduced the accumulation of oxidative stress biomarkers. The activities of superoxide dismutase and catalase, and the accumulation of proline, glycinebetaine, total phenols, and total flavonoids increased with NaCl stress, but these attributes further increased with EBR supplementation. The activities of enzymes and the levels of non-enzymatic antioxidants involved in the Asc-Glu cycle also increased with NaCl stress, and further enhancement in these attributes was recorded by EBR supplementation. Salinity elevated the methylglyoxal content, but it was decreased by the EBR supplementation accompanying with up-regulation of the glyoxalase cycle (GlyI and GlyII). Salinity enhanced the Na <superscript>+</superscript> uptake in root and shoot coupled with a decrease in uptake of Ca <superscript>2+</superscript> , K <superscript>+</superscript> , and P. However, EBR supplementation declined Na <superscript>+</superscript> accumulation and promoted the uptake of the aforementioned nutrients. Overall, EBR supplementation regulated the salt tolerance mechanism in soybean plants by modulating osmolytes, activities of key enzymes, and the levels of non-enzymatic antioxidants.<br />Competing Interests: The authors declare no conflict of interest.
- Subjects :
- Adaptation, Physiological drug effects
Ascorbic Acid metabolism
Catalase metabolism
Chlorophyll metabolism
Flavonoids metabolism
Glutathione metabolism
Lactoylglutathione Lyase metabolism
Malondialdehyde metabolism
Oxidative Stress drug effects
Phenols metabolism
Plant Proteins metabolism
Plant Roots drug effects
Plant Roots growth & development
Plant Roots metabolism
Plant Shoots drug effects
Plant Shoots growth & development
Plant Shoots metabolism
Proline metabolism
Glycine max growth & development
Glycine max metabolism
Superoxide Dismutase metabolism
Thiolester Hydrolases metabolism
Up-Regulation
Brassinosteroids pharmacology
Salt Stress drug effects
Glycine max drug effects
Steroids, Heterocyclic pharmacology
Subjects
Details
- Language :
- English
- ISSN :
- 2218-273X
- Volume :
- 9
- Issue :
- 11
- Database :
- MEDLINE
- Journal :
- Biomolecules
- Publication Type :
- Academic Journal
- Accession number :
- 31652728
- Full Text :
- https://doi.org/10.3390/biom9110640