Abstract

Introduction: Pistachio is one of the top export products of Iran,. Hence, due to groundwater depletion and as a result of salinization of soil and water used for agriculture, a solution should be sought to increase the tolerance of the plant under salinity stress . Materials and Methods: In order to investigate the effect of various priming treatments , an experiment was conducted in the form of a factorial design with five treatments and three replications in the greenhouse of the Rafsanjan Pistachio Research Institute in 2020. Priming treatments include control (without priming), P in two concentrations of 100 (P1) and 200 (P2) mg/liter, potassium nitrate (KNO3) in two concentrations of 100 and 200 mg/liter, and the salinity stress treatments were at three levels of 6, 12, and 18 deciSiemens/meter (dS/m). The traits to be measured were diameter and stem height after stress, fresh and dry weight of shoots and roots, and germination percentage. Results: The results of the research showed that salinity significantly reduced the germination percentage at all three levels. The highest dry weight of shoots and roots was due to the interaction of P2 and salinity level of 12 dS/m. P2 in seed priming caused an increase in all investigated traits. Conclusion: In general, it can be concluded that priming with tested materials can reduce salinity to an acceptable and satisfactory level .