Özet:

This study was conducted using ten different varieties of durum wheat (Altıntaş-95, Ç-1252, Dumlupınar, Eminbey, Kunduru-1149, Kızıltan-91, Mirzabey-2000, Soylu, Svevo, Türköz) to evaluate germination and early seedling stage under salt stress induced by increasing sodium chloride (NaCl) concentrations. In the study, some indices of germination and seedling development were calculated and analyzed. Salt stress significantly reduced germination capacity (GC), germination index (GI), while increasing the stress index (SI). Seedling growth and initial vitality (IV) were also significantly inhibited. Varietal differences emerged in all of these traits: Altıntaş-95 was the least affected variety, while Kızıltan-91 and Svevo were the most affected, and other varieties fell in between. Depending on the varieties, salt stress reduced germination capacity and also affected seedling development. Under low salt stress conditions (0-3 g L-1 NaCl), it is believed that the main reason for the negative impact on germination is osmotic stress. Indeed, salt delayed germination by inhibiting water uptake by plants. Similarly, at high salt levels (6 g L-1 NaCl), salt damaged the cellular structures of plants, significantly impacting both germination and seedling growth. In this context, it would be accurate to say that the first viability and stress index, which clearly distinguishes between the varieties studied, are useful traits for identifying salt-tolerant plant genotypes and can be employed in related studies.

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