Back to Search
Start Over
Salt stress mitigation by seed priming with UV-C in lettuce plants: Growth, antioxidant activity and phenolic compounds
- Source :
- Plant Physiology and Biochemistry, Plant Physiology and Biochemistry, Elsevier, 2014, ⟨10.1016/j.plaphy.2014.07.019⟩
- Publication Year :
- 2014
- Publisher :
- Elsevier BV, 2014.
-
Abstract
- International audience; Seeds of Lactuca sativa L. 'Romaine' were subjected to priming treatments with UV-C radiation at 0.85 or 3.42 kJ m À2. Seedlings obtained from both primed (Pr) and non-primed (NPr) seeds were grown in an hydroponic culture system supplemented with 0 (control) or 100 mM NaCl. After 21 days of NaCl treatment, root and leaf biomass, root lengths, leaf numbers, and leaf surface area were measured. Ions (Na þ and K þ) accumulation was determined in roots and leaves. Total phenolic compound and flavonoid concentrations, as well as antioxidant and antiradical activities were measured in L. sativa leaves. Salt stress resulted in a lower increase in fresh weight of roots and leaves, which was more pronounced in roots than in leaves, due to reduced root elongation, leaf number and leaf expansion, as well as leaf thickness. The lower increase in fresh weight was accompanied by a restriction in tissue hydration and K þ ion uptake, as well as an increase in Na þ ion concentrations in all organs. These effects were mitigated in plants from the UV-C primed seeds. The mitigating effect of UV-C was more pronounced at 0.85 than at 3.42 kJ m À2. Salt stress also resulted in an increase in total phenolic compounds and flavonoid concentrations and in the total antioxidant capacity in leaves. The highest diphenylpicrylhydrazyl radical (DPPH) scavenging activity was found in the leaves of plants from both Pr seeds. Our results suggest that plants grown from seed primed by exposure to moderate UV-C radiation exhibited a higher tolerance to salinity stress.
- Subjects :
- 0106 biological sciences
Antioxidant
Ultraviolet Rays
Physiology
DPPH
[SDV]Life Sciences [q-bio]
medicine.medical_treatment
Flavonoid
Lactuca
Plant Science
Priming (agriculture)
Sodium Chloride
Biology
01 natural sciences
Antioxidants
03 medical and health sciences
chemistry.chemical_compound
Phenols
Stress, Physiological
Botany
Tissue hydration
Genetics
medicine
[SDV.BV]Life Sciences [q-bio]/Vegetal Biology
030304 developmental biology
chemistry.chemical_classification
0303 health sciences
fungi
food and beverages
Lettuce
biology.organism_classification
Salinity
Horticulture
chemistry
Elongation
010606 plant biology & botany
Subjects
Details
- ISSN :
- 09819428
- Volume :
- 83
- Database :
- OpenAIRE
- Journal :
- Plant Physiology and Biochemistry
- Accession number :
- edsair.doi.dedup.....3f02dc7c2704f2f0081d7c9e85e13696