Abstract
Salt stress is one of the important environmental factors limiting the growth and productivity of barley (Hordeum vulgare L.) worldwide. Increasing salt stress negatively affects plant growth and development, posing a threat to global food security. In this study, some physiological and biochemical effects of salt stress at different concentrations (0, 50, 100, 200 mM NaCl) on 8 barley varieties (Kıral-97, Harman, Yaprak, Yaba, Larende, Cumhuriyet-50, Kalaycı-97, Çıldır-02) grown in Turkey were determined. For this purpose, the effects of salt stress on root-shoot length, biomass, pigment content, specific leaf area (SLA), relative water content (RWC), lipid peroxidation content (TBARS), hydrogen peroxide (H2O2) (spectrophotometric and histochemical staining) content were determined in 35-day-old seedlings. Our results showed that increased salt stress decreased the root-shoot lengths, biomass, SLA, and pigment contents in Cumhuriyet-50 and Çıldır-02 varieties, while increasing the amount of TBARS and H2O2. It was determined that Yaprak and Yaba varieties were less affected by salt stress and were more resistant to salinity compared to other varieties.
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