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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Salt stress mitigation by seed priming with UV-C in lettuce plants: Growth, antioxidant activity and phenolic compounds
Plant Physiology and Biochemistry, Volume 83, Year 2014
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Description
Seeds of Lactuca sativa L. 'Romaine' were subjected to priming treatments with UV-C radiation at 0.85 or 3.42kJm-2. Seedlings obtained from both primed (Pr) and non-primed (NPr) seeds were grown in an hydroponic culture system supplemented with 0 (control) or 100mM NaCl. After 21 days of NaCl treatment, root and leaf biomass, root lengths, leaf numbers, and leaf surface area were measured. Ions (Na+ and K+) 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+ ion uptake, as well as an increase in Na+ 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 3.42kJm-2. 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. © 2014 Elsevier Masson SAS.
Authors & Co-Authors
Ouhibi, Chayma
Tunisia, Tunis
Université de Tunis el Manar, Faculté Des Sciences de Tunis
France, Avignon
Université D'avignon et Des Pays du Vaucluse
Attia, Houneïda A.
Tunisia, Tunis
Université de Tunis el Manar, Faculté Des Sciences de Tunis
Rebah, Fedia
Tunisia, Tunis
Université de Tunis el Manar, Faculté Des Sciences de Tunis
Msilini, Najoua
Tunisia, Tunis
Université de Tunis el Manar, Faculté Des Sciences de Tunis
Chebbi, Mohamed
Tunisia, Tunis
Université de Tunis el Manar, Faculté Des Sciences de Tunis
Aarrouf, Jawad
France, Avignon
Université D'avignon et Des Pays du Vaucluse
Urban, Laurent
France, Avignon
Université D'avignon et Des Pays du Vaucluse
Lachaâl, Mokhtar
Tunisia, Tunis
Université de Tunis el Manar, Faculté Des Sciences de Tunis
Statistics
Citations: 135
Authors: 8
Affiliations: 2
Identifiers
Doi:
10.1016/j.plaphy.2014.07.019
ISSN:
09819428
Research Areas
Cancer