外源赤霉素对盐胁迫下盐角草种子萌发及幼苗生长的影响

Effects of Exogenous GA_3 on Seed Germination and Seedling Growth of Salicornia Europaea L. under Salt Stress

[目的]研究外源赤霉素(GA3)对盐胁迫下盐角草种子发芽及幼苗生长的影响。[方法]通过不同浓度(0、100、300、500、700mmol/L)的NaCl结合10μg/ml GA3处理,研究了外源GA3对盐胁迫下盐角草种子萌发及幼苗生长的影响。[结果]外源GA3提高了盐胁迫条件下盐角草的发芽率、发芽势、发芽指数以及活力指数。在外源GA3处理下,盐角草的根系活力、幼苗根茎长及耐盐性都高于单盐处理。[结论]在一定浓度范围内,外源GA3能缓解盐胁迫对盐角草种子萌发及幼苗生长的抑制作用。

[Objective] The paper was to study the effects of exogenous GA3 on seed germination and seedling growth of Salicornia europaea L.under salt stress.[Method ] With the combination of different concentrations of NaCl（0,100,300,500,700 mmol/L） with 10 μg/ml GA3 treatments,the effects of exogenous GA3 on seed germination and seedling growth of S.europaea under salt stress were studied.[Result] Exogenous GA3 promoted the seed germination rate,germination capacity,germination index and seed vigor index of S.europaea under salt stress.Under the treatment of exogenous GA3,the root system vigor,the lengths of roots and stems and the salt-tolerance of S.europaea were higher than that of single salt stress treatment.[Conclusion] Within a certain concentration range,exogenous GA3 could alleviate the inhibition effects of salt stress on seed germination and seedling growth of S.europaea.