The relationship between salt stress tolerance at germination stage and mature plant in barley (Hordeum vulgare L.) genotypes

Environmental stress is the main effect reducing plant growth and development especially in germination stage. The aim of this project was to determine the threshold for salt stress tolerance in germination stageand mature plant in barley (Hordeum vulgare L.) genotypes and evaluate the relation between indices. First, the LD50 test was conducted for salt stress tolerance using NaCl, then probit analyze was done. The reaction of seven selected genotypes from barley and three cultivars were assessed in four levels of salinity and drought stress. Factorial experiment was conducted in a randomized complete block design with four replications. Based on probit analysis, the LD50 for salinity stress was 18 ds/m. Salt stress germination experiment included control, 9, 18 and 27 ds/m levels. Principal component analysis showed that at two levels of moderate and moderate stress in germination experiments (9 and 18 dS / m) that the salinity concentration was close to field conditions, in vitro tolerance indices and The field showed a close relationship. This relationship was not observed at severe stress levels (27 ds/m). Overall, the results showed that genotypes TN4807, KC70173, TN6141 and Nosrat cultivar had higher tolerance to germination conditions (9 and 18 ds/m) and field conditions.