低温胁迫对北美豆梨电阻抗参数与抗寒性的影响  

The Impacts of Low Temperature Stress on Electrical Impedance Parameters and Cold Resistance of Pyrus calleryana Decne

作　　者：李清亚 路斌[1] 赵佳伟 栗浩 李艳[1] 苗胜越 路丙社[1] LI Qing-ya;LU Bin;ZHAO Jia-wei;LI Hao;LI Yan;MIAO Sheng-yue;LU Bing-she(College of Landscape and Tourism,Agricultural University of Hebei,Baoding Hebei 071000,P.R.China;Renqiu Institute of Landscape Architecture,Renqiu Hebei 062550,P.R.China)

机构地区：[1]河北农业大学园林与旅游学院,河北保定071000 [2]河北省任丘市园林绿化局,河北任丘062550

出　　处：《西部林业科学》2019年第6期150-154,162,共6页Journal of West China Forestry Science

基　　金：国家科技支撑计划项目(2013BAD01B06-1);河北省自然科学基金项目(C2019204066)

摘　　要：以北美豆梨的一年生休眠枝条为材料,研究冷冻处理对其枝条电阻抗参数、相对电导率和丙二醛含量的影响。结果表明,随着温度的下降,北美豆梨枝条的胞外电阻Re、豫驰时间τ和豫驰时间分布系数φ均呈现逐渐下降的趋势,相对电导率、丙二醛和胞内电阻Ri则呈逐渐上升的趋势;相关性分析表明,北美豆梨的胞内电阻Ri与相对电导率和丙二醛含量呈极显著正相关。应用Logistics方程对北美豆梨胞内电阻Ri和相对电导率进行拟合,所得方程拐点温度分别为-22.66℃和-22.33℃,其结果非常接近,表明胞内电阻Ri可作为分析北美豆梨抗寒性的适宜参数。The effects of freezing treatment on branch electrical impedance parameters,relative conductivity and MDA content were studied by using the current shoots of 1-year-old Pyrus calleryana Decne.The results showed that the extracellular resistance Re of Pyrus calleryana Decne branches decreased with temperature,and the relaxation timeτand the relaxation time distribution coefficientφall showed a gradual decline trend.The relative conductivity,MDA and intracellular resistance Ri gradually increased.Correlation analysis showed that there was a significant positive correlation among the intracellular resistance Ri,relative conductivity and MDA content.Logistics were used to fit the intracellular resistance Ri and relative conductivity of Pyrus calleryana Decne.The obtained temperatures were-22.66℃and-22.33℃,respectively,and the results were very close.The intracellular resistance Ri can be used as a suitable parameter for analyzing the cold resistance of Pyrus calleryana Decne.

关 键 词：北美豆梨 电阻抗 丙二醛 相对电导率 

分 类 号：S662.9[农业科学—果树学]