Effects of soaking seeds with exogenous gibberellin on seed germination and seedling growth of tall fescue under salt stress
[Objective]The study was carried out to investigate the effect of exogenous gibberellin infusion on seed germination and seedling growth of tall fescue under salt stress.[Method]In this experiment,tall fescue "Fire Phoenix 2" was used as experimental material,and paper germination method was adopted. Twenty treatment groups were set up to soak tall fescue seeds with 0,100,150,200 and 300 mg/L GA solution for 2 days,and then placed them in petri dishes containing 0,100,200 and 250 mmol/L NaCl solution for germination test,and the re-lated indexes of seed germination and seedling growth were determined respectively.[Result]The analysis of related indexes showed that under 100 mmol/L salt stress,the optimal GA concentration for alleviating salt stress and thus promoting seed germination and seedling growth was 200 mg/L,and all the indexes of seed germination were better than those of the 0 mg/L GA treatment,and under 200 and 250 mmol/L salt stress,the optimal GA concentration for alleviating salt stress and thus promoting seed germination and seedling growth was 150 mg/L,and all the indexes of seed germination were slightly better than those of the 0 mg/L GA treatment.[Conclusion]The comprehensive analysis of salt stress relieving ability of different concentration GA solution by fuzzy mathematical membership func-tion method showed that the best concentration of gibberellin which could relieve salt stress and promote seed germi-nation and seedling growth was 150 mg/L.
万方数据
维普
