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核农学报  2013 

磁场处理紫苏种子的生物学效应

DOI: 10.11869/hnxb.2013.11.1670, PP. 1670-1674

Keywords: 磁场,紫苏种子,种子萌发,幼苗生长

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Abstract:

利用83.5mT(50A)磁场强度处理紫苏[Perillafrutescens(L.)Var.crispa]种子,研究不同处理时间对种子萌发及幼苗生长的影响,为探讨磁场对紫苏种子的作用机理提供依据。结果表明,83.5mT磁场处理紫苏种子后,种子发芽势、发芽率、真叶展开率、株高、根长、须根数以及根系活力都随着处理时间的延长呈先升高后降低的趋势;其中发芽势在2、3h时达到显著水平;发芽率以处理3h时达到最高,为97.3%;真叶展开率在1、2和3h三个处理条件下达到显著水平,且在3h时达到最大值;株高、根长及须根数均在3h时达到最大值;磁场处理3h时根系活力最强,达0.76TTFmg·(根·h)-1;POD活性及硝酸还原酶活性在2~3h时相对增幅较大;综合分析各指标说明83.5mT的磁场强度处理紫苏种子3h时,对刺激种子活力、促进种子萌发及幼苗生长效果最佳。

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