不同盐胁迫处理下番茄种子萌发期的耐盐性研究

Study on Salinity Tolerance of Tomatoes during Seed Germination under Different Salt Stress Conditions

[目的]为番茄耐盐种质资源的筛选、利用及设施抗盐栽培提供理论依据。[方法]采用皿内培养法，对NaCl单一盐和Ca（NO3）2、NaCl复合盐胁迫下番茄种子萌发期的耐盐性进行研究。[结果]随着2种盐浓度的增大，种子萌发的整齐度下降，萌发率降低，发芽受损率增加，发芽指数和幼苗活力指数下降；盐浓度为0．2％～0．4％时，2种盐胁迫处理下各指标差异较小，盐浓度为0．6％～1．0％时，2种盐胁迫处理下各指标之间差异显著。[结论]番茄种子对Ca（NI3）2、NaCl复合盐胁迫的耐性高于NaCl单盐胁迫。

[ Objective ] The aim of this study was to provide the theoretical basis for screening and utilizing salt-tolerant tomato varieties as well as for cultivating salt-resistance. [ Method] Salinity tolerance of tomato during seed germination under simple salt sodium chloride and double salt calcium nitrate or sodium chloride stress were studied by Petri dish culturing. [ Result ] As the two kinds salt concentration increased, the germi- nation regularity, the germination rate, the germination index and the growing vigor index of tomato seedlings decreased, but the germination losing rate increased. When salt concentration was from 0.2% to 0.4% , there was little difference among all indexes under two kinds of salt stress. However, when salt concentration was from 0.6% to 1.0%, the difference among all indexes under two kinds of salt stress was significant. [Conclusion] Salinity tolerance of tomato seeds under double salt calcium nitrate or sodium chloride stress was higher than that under simple salt sodium chloride stress.