以2个亚麻品种为试验材料，在不同浓度高pH值（NaOH）、中性盐（NaCl）、碱性盐（ NaHCO3或Na2 CO3）和混合盐（ NaHCO3和Na2 CO3混合）胁迫处理下，对种子萌发期耐盐碱性进行了比较研究，主要进行了亚麻种子萌发期相对发芽势、相对发芽率、根长、下胚轴长及鲜重的测量。结果表明：（1）高pH值胁迫对2个品种的所有指标影响不大，其它胁迫条件下各指标数值均随胁迫浓度的升高而减少，2个品种对中性盐的耐受性好于碱性盐；（2）在中性盐胁迫下，黑亚14号的耐受性好于Diane，在碱性盐和混合盐胁迫下， Diane耐受性好于黑亚14号；（3）亚麻进行耐盐碱品种筛选采取的最适胁迫浓度为：150mM NaCl、15mM Na2CO3和30mM NaHCO3。本研究结果将为亚麻耐盐碱种质资源的筛选提供依据。%In this paper , the properties of saline -alkaline tolerance of two flax varieties were stud-ied under different concentrations of alkaline (NaOH), neutral salt (NaCl), alkaline salt (NaHCO3 or Na2CO3) and mixed salts stresses (mixture of NaHCO3 and Na2CO3) at germination stage.The relative germination potential , relative germination rate , root length, hypocotyl length and fresh weight were measured.The results showed that:(1) pH stress had less effect than other stresses on all the measured indexes of the two varieties , and the two varieties had better tolerance to neutral salt stress than to alka-line salt stress;(2) Heiya14 had a higher tolerance than Diane under the neutral salt stress , but under the alkaline salt and mixed salt stress , the result was opposite;(3) the appropriate concentrations of sa-line-alkaline for screening flax varieties were 150 mM NaCl, 15 mM Na2 CO3 and 30 mM NaHCO3.The results would provide references for screening flax varieties of saline -alkaline tolerance.
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