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Publication Type J
Authors Ksouri, R., W. Megdiche, A. Debez, H. Falleh, C. Grignon and C. Abdelly
Title Salinity effects on polyphenol content and antioxidant activities in leaves of the halophyte Cakile maritima
Source Plant Physiology and Biochemistry
Author Keywords antioxidant activity; Cakile maritima; polyphenol content; salt stress; variability superoxide-dismutase; pea leaves; in-vitro; stress; extracts; systems; plants; water; constituents; germination
Abstract 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 and 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-pierylhydrazyl 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. (c) 2007 Elsevier Masson SAS. All rights reserved.
Author Address CBBC, Lab Adaptat Plantes Stress Abiot, Hammam Lif 2050, Tunisia. Agro M INRA, B & PMP, F-34060 Montpellier, France. Ksouri, R, CBBC, Lab Adaptat Plantes Stress Abiot, BP 901, Hammam Lif 2050, Tunisia. physiologiste@yahoo.com
29-Character Source Abbreviation Plant Physiol. Biochem.
Publication Date Mar-Apr
Year Published 2007
Volume 45
Issue 3-4
Beginning Page 244-249
Unique Article Identifier ISI:000246690900010
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