摘要： 采用砂基培养法,研究了不同浓度NaCl胁迫对竹柳种苗形态指标及生理指标的影响。结果表明:随着NaCl浓度的升高,竹柳的株高、茎粗呈下降趋势,叶片有不同程度的干枯、发黄、生长势衰退等现象,与对照差异显著;叶片含水量、电导率、MDA含量呈升高趋势;叶绿素、脯氨酸和可溶性糖含量均呈先上升后下降变化。通过对外观形态的观测以及生理指标的综合分析,推断出竹柳的耐盐阈值是0.5%,存活阈值是0.8%。该研究为竹柳在盐碱地的开发利用提供了理论依据。

关键词: 竹柳, NaCl胁迫, 形态指标, 生理指标

Abstract: The effects of different NaCl solutions on the morphological and physiological indexes of Zhuliu plants under sand-cultured were studied.The results showed that,with the increase of NaCl concentration,the height and the stem diameter decreased continuously,and significant difference was observed compared with the control..The leaves of Zhuliu appeared different degrees of dry rot yellowing,and growth vigor recession.And the water content,electrical conductance,MDA content increased gradually.The content of chorophy,proline,soluble sucrose were increasing at first and then declining later,showing regularity changes.The salt tolerant threshold of Zhuliu was deduced as 0.5% and survival threshold was 0.8% by observing visual form and analyzing physiological index.The research provided the scientific basis for exploitation and utilization of Zhuliu in saline-alkali land.

Key words: Zhuliu, NaCl stress, Morphological index, Physiological index

中图分类号: 

• S156