药赏两用植物落地生根的耐盐性评价

Evaluation of Salt Resistance of Kalanchoe daigremontiana and Its Antioxidant Enzymes Activities

以药赏两用植物落地生根为试材,调查了不同NaCl浓度下其在组织培养、离体叶片和实生幼苗的生长情况,并测定了其抗氧化酶活力;同时,采用文献调研法分析了我国滨海地区盐度分布及现有部分的绿化植物耐盐性。结果表明:落地生根对低于150mmol·L^(-1) NaCl有较好抗性;随着NaCl浓度增加,SOD和POD活性均呈现先升高后下降的趋势,峰值分别出现在150、200mmol·L^(-1) NaCl处理组;MDA含量则缓慢增加,在150mmol·L^(-1) NaCl处理组中达到最大值,之后保持平稳状态;综合组织培养、离体叶片和抗氧化系统活性分析结果,大叶落地生根对低于150mmol·L^(-1) NaCl的条件有较强抗性。文献分析表明我国盐碱地地区NaCl浓度多介于34~98mmol·L^(-1)当量NaCl之间,表明大叶落地生根具有耐受我国部分盐碱地地区盐分胁迫的能力,为盐碱地尤其是滨海盐碱地的绿化提供了新的参考。

Using K.daigremontianaas experimental material,tissue culture andin vitroleaves and seedlings were used to test its growth performance under different concentration of NaCl.Meanwhile,related references were surveyed using key words against CNKI database.The results showed that the tissue culture andin vitroleaves stress experiments exhibited the salt resistance of K.Daigremontianabetween 50-150mmol·L-1.Measurement of antioxidant enzymes activities of SOD,POD,as well as MDA accumulation,also confirmed the same results.According to the literatures,the NaCl concentration in saline areas of Chinese coastal regions was majorly between 34-98mmol·L-1.The results provided a reference for using K.daigremontianain saline land greening in Chinese coastal regions.