Physiological mechanisms and quantitative trait loci for the salt tolerance in barely

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We investigated the physiological mechanisms of salt stress tolerance in barely by using a tolerant cultivar, OUE812 and a susceptive cultivar, OUC613. OUE 812 plants produced heavier dry matter by keeping high root hydraulic conductance under the short term salt stress and by decreasing Na^+/K^+ ratio in leaves under the long term salt stress compared with OUC613. Under the long term salt stress, OUE 812 plants showed the higher capacity of grain ripening compared with OUC613, resulting in the significant heavier grain weight in OUE 812 plants. By using recombinant inbred lines derived from Russia 6 and H.E.S.4, four regions of quantitative trait loci for grain ripening capacity were identified under salt stress conditions.