Effect of Foliar Salicylic Acid Application on Salinity Resistance of Some Grapevine Rootstocks

This study was conducted in an unheated plastic greenhouse located in the research area of Ordu University, Turkey. In the research, two-node wood cuttings of 41 B and 1103P grapevine rootstocks were used as the material. Leaf application of salicylic acid at five different doses (0, 0.25, 0.50, 1.0 and 2.0 mM) was applied to both rootstocks under salinity as well as salt-free medium. Vine vigor (%), weight of dry shoot (g), total chlorophyll content (SPAD), weight of dry root (g), degree of damage (0-3), rate of root and shoot tolerance, as well as the content of sodium (ppm), potassium (%), and calcium (%) in the leaf parameters were investigated. It was found that the 0.25 mM salicylic acid dose gives more effective results in terms of the features studied in 41 B and 1103P grapevine rootstocks grown under salt-free medium. It was determined that in terms of the features studied, the application doses of 0.25-1.0 mM salicylic acid are found to be more effective in 41 B grapevine rootstock grown in salinity medium, while in 1103P rootstock, application doses of 0.25-2.0 mM salicylic acid stand out.