盐胁迫对多花木蓝幼苗生理特性的影响

Effects of Salt Stress on Physiological Characteristics of Indigofera amblyantha Seedling

[目的]研究多花木蓝幼苗的耐盐性,为生产利用提供参考依据。[方法]选用不同浓度梯度的NaCl溶液对盆栽多花木蓝幼苗定时定量浇灌,每3 d,采集各处理的叶片进行生理指标测定,直到出现盐害症状为止。[结果]在盐胁迫条件下,随着盐溶液浓度的上升和胁迫处理时间的延长,多花木蓝幼苗的相对电导率呈先下降后上升的趋势,叶绿素含量呈下降的趋势,可溶性蛋白质含量和SOD活力呈先上升后下降的趋势。[结论]从盐胁迫第9天开始,浓度大于150 mmol/L的NaCl溶液对所测生理指标的影响最大。

[ Objective ] To research the salt stress of Indigofera amblyantha seedling, and to provide references for the application of 1. ambly- antha. [ Method] 1. amblyantha pot seedling were poured by NaC1 solution with different concentration. Taking leaves of each treatment every 3 days to measure physiological indicators from the start date of salt stress until the salt injury symptoms appear. [ Result] Under salt stress, with the increased concentrations of salt solution and days of stress, the value of I. amblyantha seedling＇ s relative conductivity has a decreasing trend at first but then, has an increasing trend. The chlorophyll content has a decreasing trend, the soluble protein content and SOD activity have an increasing trend at first but then, both of this two indicators have a decreasing trend. [ Conclusion ] The NaC1 solution with more than 150 mmol/L has the greatest influence on the measured physiological parameters from the ninth day of salt stress.