NaCl胁迫下流苏的电阻抗与电导分析

以流苏2年生苗木为材料,测定其叶片与茎在NaCl胁迫(0,0.4％,0.8％,1.2％)下的电阻抗图谱参数和电导率的变化,分析电阻抗图谱参数与电导率间的相关性,以讨论在NaCl处理下用电阻抗图谱法研究流苏受胁迫程度的有效性.结果表明:1)随着NaCl浓度的升高,叶片电导率显现逐渐升高或先升高后下降的趋势,茎的表现不明显；随着胁迫时间的延长叶片和茎电导率,整体均显现逐渐升高或先升高后降低的趋势.流苏茎的耐盐性强于叶片.2)随着NaCl浓度的升高,流苏叶片和茎的高频电阻率r、胞内电阻率ri和弛豫时间Τ呈现先增大后减小或逐渐减小的特征；随着胁迫时间的延长叶片和茎的各处理的电阻抗图谱参数均在胁迫15天时出现最低值.相关分析表明:流苏对0.8％以上NaCl浓度胁迫敏感,用电阻抗图谱参数可以表征流苏受NaCl胁迫的程度,且用EIS参数胞内电阻率ri、高频电阻率r来表征叶耐盐特性,用胞内电阻率ri、弛豫时间Τ来表征茎耐盐特性.ri为评价流苏叶和茎NaCl胁迫的最佳参数.

Electrical Impedance and Electrolyte Leakage Analysis of Chinese Fringetree(Chionanthus retusus) under NaCl Stress

The electrical impedance spectroscopy(EIS) parameters and relative electrolyte leakage leaves and stems of of Chinese Fringetree(Chionanthus retusus) leaves and stems under NaCl stress(0.4%,0.8% and 1.2%)(water as the control) were measured.The validity of EIS parameters was testified by comparing the relation ship between these parameters and relative electrolyte leakage.The results showed that:1) With the increasing in concentration of NaCl,the relative electrolyte leakage of the leaves increased graduall...