In this study, three pistachio cultivars were treated with different concentration of salt solution to provide a reference for the cultivation of salt tolerant rootstocks. The results revealed that increasing the salinity stress resulted in decreasing growth performances of the plants in the three pistachio cultivars. This decrease was not significant in salinity of 100 mM but was significant in other salinities compared to control. In all salinity levels and control conditions, Akbari (Ak) cultivar exhibited larger growth performances of the plants in comparison with the other two cultivars; this state is more sensible in salinities of 200 and 300 mM. Ak cultivar assumed significantly higher pigment amount than the other two cultivars in high salinities. Impact of salinity on reduction of chlorophyll amount was significant in all cultivars starting from salinity of 200 mM. Moderate and high salinity led to an increase in amount of total soluble sugars in Ak cultivar while no significant contrast was achieved between the other two cultivars compared to control conditions. The impacts of different salinities on Na and Cl were nearly similar and the amounts of these elements increased with exceeding salinity stress in different cultivars compared to control condition. The high stress level resulted in remarkable enhancement of Cl and Na amounts in Ouhadi (Ou) and Kalehghouchi (Ka) cultivars. However, the low and moderate salinities increased the concentration of potassium in AK cultivar compared to the other two cultivars. Therefore, higher plant growth and photosynthetic pigments, lower Na and Cl content, greater accumulation of soluble sugars and K could explain the greater salt-tolerance of AK compared to that of Ka and Ou.
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Hossein Abbaspour (2012) studied this question.