Mohsen Ghorbani*, Seyed Najmmaddin Mortazavi and Masoud Arghavani
This study was conducted in order to investigate the morphophysiologycal responses of Frankenia (Frankenia thymifolia Desf.) to water deficit stress and salicylic acid application in 2016, in horticultural science department, at University of Zanjan, Iran. Three soil available water levels (50, 75, and 100 %) and salicylic acid (0, 1 and 2 millimolar) were applied in a factorial experiment based on completely randomized design, with four replications. Water deficit reduced leaves relative water content and shoot growth whereas, root growth, root-shoot ratio, leaves antioxidant capacity, electrolyte leakage, proline, total phenol, and chlorophyll content increased with decreasing soil available water. Salicylic acid application ameliorates the adverse effects of water deficit in Frankenia by increasing leaves antioxidant capacity, proline, and chlorophyll content as well as reducing electrolyte leakage. This effect was more pronounced in 2 millimolars, suggesting that higher concentrations of salicylic acid must be evaluated.
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