摘要
[目的]了解Ca2+对提高黄瓜种子抗盐性的缓解作用,为盐碱地的开发利用提供基本理论依据。[方法]采用室内水培法研究浓度100 mmol/L NaCl溶液胁迫下不同浓度的CaCl2和Ca(NO3)2对黄瓜种子发芽的影响。[结果]当Ca2+浓度为10 mmol/L时,黄瓜种子的各项发芽指标都有显著的提高,且CaCl2缓解胁迫作用明显好于Ca(NO3)2。当Ca2+浓度超过20 mmol/L时,随着Ca2+浓度的增加,种子活力指数、胚根长及胚根鲜重明显下降,说明低浓度Ca2+处理对NaCl胁迫下黄瓜种子的萌发有促进作用,但高浓度Ca2+会出现抑制作用。[结论]不同浓度和不同种类的外源Ca2+对NaCl胁迫下黄瓜种子发芽的缓解效应不同,低浓度Ca2+处理对NaCl胁迫下黄瓜种子的萌发有促进作用,但高浓度Ca2+会出现抑制作用。
[Objective] The aim was to study the effects of Ca2＋ on cucumber seeds germination under NaCl stress so as to provide theoretical basis for the development and application of salt lick.[Method]The indoor water culture method was adopted to study the effects of different concentration CaCl2 and Ca（NO3）2 on seeds germination of cucumber under 100 mmol/L NaCl stress.[Result]When the Ca2＋ concentration was 10 mmol/L,the seed germination indicators of cucumber were all significantly increased.And the mitigation of CaCl2 was better than Ca（NO3）2.When Ca2＋ concentration was more than 20 mmol/L,along with the increase of Ca2＋ concentration,the seed germination vigor index,root length and root fresh weight of cucumber were obviously declined.The result stated that low concentration of the calcium treatment had some mitigative effects on NaCl stress,but high concentration of exogenous Ca2＋ had inhibition effects on the germination of cucumber.[Conclusion] The mitigation effect of different concentration and varieties of exogenous Ca2＋had different mitigation effects on the germination of cucumber on Nacl stress.Low concentration of the calcium treatment had some mitigative effects on NaCl stress,but high concentration of exogenous Ca2＋ had inhibition effects on the germination of cucumber.
出处
《安徽农业科学》
CAS
北大核心
2011年第30期18453-18454,共2页
Journal of Anhui Agricultural Sciences
基金
盐城工学院科研项目(XKY2007050)
