Foliar Application of Ulva rigida Water Extracts Improves Salinity Tolerance in Wheat (Triticum durum L.)

This study investigated the effect of seaweed extract (SWE) sprays obtained from Ulva rigida on wheat plants (Triticum durum L., variety Karim) grown under salt stress conditions for six weeks. Three levels NaCl (0, 34.22, 68.44 mM) and four different concentrations 12.5, 25 50%) as a water were applied. The results indicated that treated showed higher ability to tolerate (34.22 or mM NaCl) by significant (p < 0.05) increase plant growth photosynthetic pigment contents, compared those control (non-treated plants). Furthermore, there was improvement in antioxidant enzyme activity, such superoxide dismutase (SOD), isocitrate dehydrogenase (ICDH), glutathione peroxidase (GPx), reductase (GR) activities stressed plants, especially with 12.5% SWE. Overall, our suggest application could be used promising biostimulant treating salinity stress.