Abstract
Two grafted cultivars of Z. spina-christi (‘Danehgird’ and ‘Danehboland’ were grafted on wild seedlings) and non-grafted seedlings were grown in soil and perlite mixture (1:1 v/v) and treated with 0 (0 dS m -1 ), 3.2 (5 dS m -1 ), 6.4 (10 dS m -1 ) and 12.8 (20 dS m -1 ) g/l NaCl. After 16 weeks, salt stress resulted in a substantial decrease in root length, stem, leaf surface, lateral root number, root, stem and leaf fresh and dry weight in both grafted cultivars and seedling rootstock. These reductions were predominance in seedling rootstock than in grafted cultivars. In all organs (leaf, stem and root) of grafted ‘Danehboland’ cultivar, the K + /Na + ratio was significantly higher than non-grafted wild seedling in saline and non-saline conditions. The proline and soluble sugar also was significantly higher in the leaves of ‘Danehboland’ cultivar than non-grafted control. The results imply the predominance of the scion genotype in determining salt tolerance in comparison with rootstock seedling.
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