盐胁迫对凤仙花种子萌发的影响

采用浓度为0%、0.2%、0.4%、0.6%、0.8%、1.0%的NaCl、Na2CO3、NaHCO3单盐胁迫凤仙花种子,通过对种子萌发特性的观察,研究不同盐分对其危害程度。结果表明:3种盐胁迫对凤仙花种子的萌发时滞、发芽率、发芽势、生长速度的影响差异明显。相同浓度下,Na2CO3胁迫时发芽率和生长速度受到显著抑制,NaCl胁迫时,发芽和生长受到的影响较小;NaHCO3胁迫时受到的抑制介于中间。综合分析,3种盐对凤仙花种子萌发影响的强弱顺序为:Na2CO3NaHCO3NaCl。

Effect of Salt Stress on Germination Characteristics of Seed of Impatiens balsamina

The effects of salt stress on germination characteristics of seed of Impatiens balsamina were studied using six different salt concent rations,0%,0.2%,0.4%,0.6%,0.8%,1.0% of NaCl,Na2CO3 and NaHCO3 under incubator.Seed germination delay,germination percentage,germination energy,root and seedling growth rate were measured.The results indicated that the germination characteristics and root and seedling growth were significantly affected by salt stress.The germination percentage and growth rate were significantly rest rained by Na2CO3 stress,while the NaCl stress was minimum.The effect of NaHCO3 stress was at midway between Na2CO3 and NaCl.The order of salt stress impact from strong to weak on seed germination of Impatiens balsamina of seed were Na2CO3,NaHCO3,NaCl.