盐碱胁迫对平欧杂种榛枝条电阻抗图谱参数及离子含量的影响  

Effects of saline-alkali stress on electrical impedance spectroscopy parameters and ion contents in shoots of Ping'ou hybrid hazelnut

作　　者：张丽[1,2] 贾志国[2] 马庆华[1] 张钢[3] 王贵禧[1] 

机构地区：[1]中国林业科学研究院林业研究所/国家林业局林木培育重点实验室/林木遗传育种国家重点实验室,北京100091 [2]河北北方学院,河北张家口075000 [3]河北农业大学,河北保定071000

出　　处：《应用生态学报》2014年第11期3131-3138,共8页Chinese Journal of Applied Ecology

基　　金：中央级公益性科研院所基本科研业务费专项资金项目(RIF2012-11);林业公益性行业科研专项经费项目(201304710);河北省科技计划项目(14236802D-3)资助

摘　　要：为探讨平欧杂种榛枝条对盐碱胁迫的适应性，测定‘辽榛3号’当年生枝条在中性盐（NaCl）、碱性盐（Na2CO3）及混合盐3种盐碱胁迫下各项电阻抗图谱（EIS）参数的变化及主要矿质元素含量，分析各电阻抗参数及矿质离子含量的相关性,结果表明：随着NaCl浓度的增加，电阻抗参数高频电阻率（r）、低频电阻率（r1）、胞内电阻率（ri）和胞外电阻率（re）均表现出先降低后增加再降低的变化趋势；Na2CO3胁迫下，各参数则呈现持续上升的变化规律；混合盐碱胁迫下，r1、re随盐浓度增加持续降低，Na^＋含量在3种类型盐碱胁迫下均随浓度的增加而上升，且NaCl胁迫〉混合盐碱胁迫〉Na2CO3胁迫；Na2C03胁迫导致了Zn、B、Ca3种元素含量的降低．5种阳离子总量与r1、Le、弛豫时间（τ）、弛豫时间分布系数（ψ）呈显著负相关．平欧杂种榛枝条能耐200mmol·L^-1碱性盐胁迫，而对中性盐的忍耐能力介于100～150mmol·L^-1。To study the adaptability to salt-alkaline stress of Ping＇ou hybrid hazelnut, ＇ Liaozhen 3＇ shoots which were treated with three types of stress neutral NaC1, alkaline Na2CO3 , and mixed saltalkali, and the changes in electrical impedance spectroscopy （EIS） parameters and mineral ion contents were subsequently determined. The correlations between the EIS parameters and mineral ion contents were analyzed. The results showed that with the increasing level of NaC1, specific highfrequency resistance （r） , specific low-frequency resistance （ r1 ）, specific intracellular resistance （ri） and specific extracellular resistance （re ） of shoots decreased firstly, then increased, and finally decreased again. However, these parameters increased gradually with the increasing level of Na2CO3, while r1 and re decreased slowly in the mixed salt-alkali treatments. The Na^＋ contents of shoots increased significantly under the three salt-alkali stresses with the order of NaC1 stress 〉 mixed salt-alkali stress 〉 Na2 CO3 stress. Furthermore, Na2CO3 stress resulted in the decreases in the contents of three elements Zn, B and Ca. The significant negative correlation was found between the sum of five cations and four EIS parameters r1 , re, relaxation time （τ） , and distribution coefficient of relaxation time （ψ）. The shoots of ＇ Liaozhen 3＇ might be tolerant of Na2CO3 stress of 200 mmol·L^-1 , while they could be resistant to NaC1 stress of 100-150 mmol·L^-1.

关 键 词：平欧杂种榛 盐碱胁迫 电阻抗图谱 离子平衡 

分 类 号：S664.4[农业科学—果树学]