摘要
[Objective] This study aimed to investigate the effects of salt stress on seed germination and seedling growth in radish（Raphanus sativus L.）.[Method] First,effects of soaking seeds with clear water and different concentrations of saline solution were compared; then,different concentrations of salt solution （0.2％-1.0％） was used to treat radish during the whole germination period.[Result] soaking seeds with clear water can improve the germination indicators of radish seeds exposed to high salt stress; low salt concentration（0.2％,0.4％） had little effect on the growth indicators of radish seedlings,and 0.2％ salt concentration can even promote the growth of radish seedlings,however,the high salinity had a bad inhibition on seedling growth,the higher the salt concentration,the stronger the inhibition.[Conclusion] According to the comprehensive comparison,the order of the six varieties in salt-tolerance was as follows：Xinxiayuanbai＞W1029,Xiayuanbai ＞ Nanyangbailizhi,Chunyidianhong＞ Sijihong 3.
[目的]研究盐胁迫对不同萝卜品种种子发芽及幼苗生长的影响.[方法]通过对清水浸种和用对应的盐分溶液浸种方式的比较.[结果]得出清水浸种的方式能使高盐分胁迫下种子的发芽指标提高. 在此基础上整个发芽期对萝卜进行不同浓度的盐分处理（0.2％～1.0％）以后,发现低盐分浓度（0.2％、0.4％）对萝卜种子生长的各个指标影响不大,甚至在0.2％盐分浓度下还能对萝卜发芽生长产生促进作用；但是高盐分对种子生长有严重抑制作用,而且随着盐分浓度增大,抑制作用增强.[结论]最后通过综合比较,得出6个品种耐盐强弱顺序为新夏圆白 ＞W1029和夏圆白＞南洋白荔枝和春一点红＞四季红3号.
基金
江苏省科技支撑计划项目(BE2012342)
江苏省盐土生物资源研究重点实验室开放课题(JKLBS2012018)
江苏省农业科技自主创新资金项目[CX(12)2006]~~
