Salinity effects on polyphenol content and antioxidant activities in leaves of the halophyte Cakile maritima.

摘要: 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. Tunisian accessions (Jerba Tabarka, respectively sampled from arid humid bioclimatic stages) under salt constraint. Three-week-old plants subjected to 0, 100, 400 mM NaCl 28 days glasshouse conditions. A significant variability response was found between both accessions: while Tabarka growth (shoot biomass, expansion) significantly restricted at 100 NaCl, compared control, Jerba increased 100 mM before declining NaCl. The better behaviour of salt-challenged plants, those may be related their higher (1.56- 1.3-fold respectively) (smaller IC50 values 1,1-diphenyl-2-picrylhydrazyl superoxide scavenging), associated with lower MDA accumulation (ca. −66% control NaCl). Taken together, our findings suggest that halophytes interesting production compounds, accession-dependent capacity induce antioxidative mechanisms salt, result corresponding sustainability.