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Salinity-induced changes in growth, photosynthetic performance and nutrient accumulation were determined in five barley ( Hordeum vulgare L.) cultivars, subjected to different NaCl concentr ations (120 and 240 mM) under controlled conditions. According to germination test data, two of these cultivars (Suleyman Bey and Vamik Hoca) were evaluated as more tolerant while Anadolu 98, Efes 3 and Gem cultivars were assessed as less tolerant. I n the early growth stage (one-week-old seedlings) salinity caus ed an increase of the root/coleoptile length ratio in the less tolerant cultivars while it was not changed in the more tole rant ones. In 4-week-old plants, PSII activity, chl orophyll a and chlorophyll b were not affected negatively by NaCl stress, the c arotenoids being even increased. Na + and Cl - accumulation in all genotypes were raised by NaCl salinity and the shoots accumulated ions at least 4- fold more than the roots. The K + /Na + and Ca 2+ /Na + ratio and Mg accumulation in the shoots of more tolerant Suleyman Bey and Vamik Hoca cultivars remained almost constant with control level. The study established that evolved sa lt tolerance strategy among the barley cultivars was based on maintenance of more cationic nutrients in shoots (K, Ca and Mg) and protection of photosynthetic apparatus in salin e conditions.

Salinity Induced Differences in Growth and Nutrient Accumulation in Five Barley Cultivars