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The study conducted in 2016 at the Department of Plant Physiology and Biochemistry at the West Pomeranian University of Technology in Szczecin was to evaluate the effect of exogenous application of 2-hydroxybenzoic acid (salicylic acid) on the efficiency of the photosynthetic apparatus of basket willow growing under conditions of elevated salt concentration. The first experimental factor was the concentration of sodium chloride (control – complete Hoagland medium, 3.0 g NaCl ∙ dm–3) and second was the concentration of 3-hydroxybenzoic acid (control – complete Hoagland medium, 138 mg ∙ dm–3). The Tora clone tolerated a short period of exposure to the NaCl concentration, as evidenced by high values of Performance Index (PI), Area, and maximum, potential efficiency of photochemical reaction in PS II determined after darkening adaptation, after reduction of acceptors in PS II (FV/FM). Longer plant exposure to salinity resulted in a decrease value of TFM parameter in the Tora clone, and PI and FV/FM in Bjor clone. The application of 2-hydroxybenzoic acid had a varied effect on chlorophyll "a" fluorescence induction parameters of basket willow growing under salt stress conditions. The use of 2-hydroxybenzoic acid increased the parameters such as chlorophyll fluorescence growth time from the beginning of the measurement to the maximum (TFM) and FV/FM in the Bjor clone with prolonged exposure to higher NaCl concentrations. For the Tora clone, the PI value decreased.

folia pomeranae universitatis technologiae stetinensis. agricultura, alimentaria, piscaria et zootechnica

EFFECTS OF 2-HYDROXYBENZOIC ACID ON THE EFFICIENCY OF THE PHOTOSYNTHETIC APPARATUS OF BASKET WILLOW (Salix viminalis L.) PLANT GROWING UNDER CONDITIONS OF SALT STRESS