Effect of high salinity and of priming of non-germinated seeds by UV-C light on photosynthesis of lettuce plants grown in a controlled soilless system

High salinity results in a decrease plant photosynthesis and crop productivity. The aim of the present study was to evaluate effect UV-C priming treatments lettuce seeds on plants grown at high salinity. Non-primed primed were an hydroponic system, with standard nutrient solution, either supplemented 100 mM NaCl (high salinity), or not (control). Considering that leaf root K + concentrations remained constant chlorophyll fluorescence parameters growth affected negatively treatment, we conclude latter origin moderate stress only. A substantial net photosynthetic assimilation (A ) however observed as consequence stomatal non-stomatal limitations treatment. This translated into parameters; it may be attributed partially salinity-associated increase concentration abscisic acid conductance. Priming by light resulted total electron transport rate leaves parameters. It is hypothesized positive aerial part salinity, mainly due its stimulating salicylic acid. Even though cytokinins’ higher from seeds, maintenance cytokinins-to-abscisic ratio also supports idea protection exposed