Evaluation for salt resistance in lettuce under seawater treatments

Salt resistance of 23 lettuce cultivars were identified at the stage of germination growth and plant growth under seawater treatments.Seedling emergence rate,tolerance index,tolerance ratio and survival rate of lettuce cultivars were evaluated by using cluster analysis.The results showed that the salt tolerance from different lettuce cultivars showed singnificant difference by using seawater treatment,the three cultivars Zhongfeng,Nanshu and XiyekujuⅠappeared in higher salt-tolerance.The salt resistance ability of lettuces could be screened at plant growth stage.