NaCl胁迫下不同抗性野生大豆体内Na^+,K^+,Cl^-浓度比较分析

The comparative analysis of Na^+,K^+,Cl^- concentrations in different resistance of wild soybean under NaCl stress

选取盐敏感型辉南野生大豆和耐盐型通榆野生大豆植物为材料,在5片复叶时期进行了10d的NaCl胁迫处理,测定了根、茎、叶中Na+,K+,Cl-的浓度,以探讨NaCl胁迫下野生大豆体内离子平衡的特点.结果表明:盐敏感型和耐盐型野生大豆植物在NaCl胁迫下,体内Na+和Cl-含量随胁迫浓度增加呈上升趋势,K+含量呈下降趋势.高盐胁迫下,除根部的K+外,其余各部位的Na+,K+,Cl-含量均表现为耐盐型野生大豆低于盐敏感型野生大豆.实验结果证明,通榆野生大豆具有颉颃盐逆境的生理特征和较好的适应性.

The experimental materials are Huinan types of wild soybean（salt sensitive）and Tongyu types of wild soybean（salt resistant）,during the period of 5compound leaves,NaCl stress treatment is applied with 10 days.The content of Na^＋,K^＋,Cl^-in roots,stems,and leaves were determined to investigate the characteristics of the ion balance in wild soybean body under the stress of NaCl.The results show that,in two kinds of wild soybean plants,Na＋and Cl-content showed an increasing trend with the increase of stress concentration,whereas K＋content decreased under the stress of NaCl.The concentration of Na^＋,K^＋and Cl^-showed that each part of salt resistant wild soybean were generally lower than the ion concentration in salt sensitive wild soybean,except K＋in the roots,under the high salt stress.The following points through the analysis,Tongyu types of wild soybean has better adaptability to saline land.