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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Salinity effects on polyphenol content and antioxidant activities in leaves of the halophyte Cakile maritima
Plant Physiology and Biochemistry, Volume 45, No. 3-4, Year 2007
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Description
Cakile maritima is a local oilseed halophyte exhibiting potential for secondary metabolite production. In the present study, plant growth, leaf polyphenol content and antioxidant activity were comparatively analyzed in two C. maritima Tunisian accessions (Jerba and Tabarka, respectively sampled from arid and humid bioclimatic stages) under salt constraint. Three-week-old plants were subjected to 0, 100, and 400 mM NaCl for 28 days under glasshouse conditions. A significant variability in salt response was found between both accessions: while Tabarka growth (shoot biomass, leaf expansion) was significantly restricted at 100 and 400 mM NaCl, compared to the control, Jerba growth increased at 100 mM before declining at 400 mM NaCl. The better behaviour of Jerba salt-challenged plants, compared to those of Tabarka, may be related to their higher polyphenol content (1.56- and 1.3-fold the control, at 100 and 400 mM NaCl respectively) and antioxidant activity (smaller IC50 values for both 1,1-diphenyl-2-picrylhydrazyl and superoxide scavenging), associated with lower leaf MDA accumulation (ca. -66% of the control at 100 mM NaCl). Taken together, our findings suggest that halophytes may be interesting for production of antioxidant compounds, and that the accession-dependent capacity to induce antioxidative mechanisms in response to salt, may result in a corresponding variability for growth sustainability. © 2007 Elsevier Masson SAS. All rights reserved.
Authors & Co-Authors
Ksouri, Riadh
Tunisia, Hamam Lif
Centre de Biotechnologie de Borj Cédria
Megdiche-Ksouri, Wided
Tunisia, Hamam Lif
Centre de Biotechnologie de Borj Cédria
Debez, Ahmed
Tunisia, Hamam Lif
Centre de Biotechnologie de Borj Cédria
Falleh, Hanen
Tunisia, Hamam Lif
Centre de Biotechnologie de Borj Cédria
Grignon, Claude
France, Montpellier
Biochimie et Physiologie Moléculaire Des Plantes
Abdelly, Chédly
Tunisia, Hamam Lif
Centre de Biotechnologie de Borj Cédria
Statistics
Citations: 480
Authors: 6
Affiliations: 2
Identifiers
Doi:
10.1016/j.plaphy.2007.02.001
ISSN:
09819428