CaCl_2对金叶女贞茎抗寒性和电阻抗图谱参数的影响

The Influence of CaCl_2 on the Frost Hardiness and Electrical Impedance Parameters in Stems of Ligustrum vicaryi During Hardening

为探明CaC l2处理对金叶女贞(Ligustrum vicaryi)茎抗寒性和电阻抗图谱参数的影响,找出抗寒性和电阻抗图谱参数的关系,2006年9月15日开始对金叶女贞当年生扦插苗进行CaC l2处理,对照为清水;分别用电阻抗图谱法和电导法估测其抗寒性,并进行比较分析。结果表明:CaC l2处理能在抗寒锻炼初期使金叶女贞茎的抗寒性提高3.5℃,金叶女贞茎的抗寒性与未冷冻处理茎的弛豫时间τ、冷冻处理后茎的胞外电阻率re、含水量之间均存在较高的相关性。

To study the influence of CaCl2 on the frost hardiness （FH） and the parameters of electrical impedance spectroscopy （EIS） in stems of Ligustrura vicaryi during the hardening period, as well as to find the relation between the EIS parameters and the FH, the cutting plants of L. viearyi is CaCl2 treated on 15 September, 2006, and the water was used as control. The FH was assessed by methods of EIS and electrolyte leakage （EL）, and the FH results between the two methods were compared. The results indicated that the FH of the stem in plants with CaCl2 treatment was 3.5℃ hardier than that in control plants during early days of the hardening period. The FH has high correlation with relaxation time （r） of stem （ not exposed to controlled freezing tests）, extracellular resistance （ re ） of stems （ after controlled freezing tests） and the water content of the stems.