%0 Journal Article
%T K+和Mg2+对盐胁迫下荞麦幼苗生理特性的效应<br>Effects of K+ and Mg2+ on Physiological Traits of Buckwheat Seedlings Under Salt Stress
%A 杨洪兵
%J 西北农业学报
%D 2015
%R 10.7606/j.issn.1004-1389.2015.05.017
%X 以不同耐盐性荞麦幼苗（盐敏感品种川荞3号和耐盐品种川荞4号）为试验材料，在盐胁迫下添加不同浓度（5、10、15、20 mmol/L）K+和Mg2+处理，测定荞麦幼苗生理指标。结果表明，适当浓度K+和Mg2+处理可显著降低盐胁迫下荞麦叶片质膜透性和MDA质量摩尔浓度，耐盐品种（川荞4号）降低幅度较大；显著增加盐胁迫下荞麦幼苗根系活力及叶片叶绿素质量分数和SOD活性，盐敏感品种（川荞3号）增加幅度较大；K+和Mg2+处理的最适浓度分别为20 mmol/L和10 mmol/L，且Mg2+的处理效果优于K+处理。<br>Buckwheat seedlings with different salt tolerance were used as experimental materials. Physiological indexes of buckwheat seedlings were determined through adding different concentrations of K+ and Mg2+ under salt stress. The results showed that the appropriate concentrations of K+ and Mg2+ treatment could significantly decrease the plasmalemma permeability of leaves and MDA molality of buckwheat under salt stress,the salt-tolerant buckwheat variety decreased more,and that could significantly increase the roots vigor of buckwheat seedlings and leaves chlorophyll mass fraction and SOD activity under salt stress,and the salt-sensitive buckwheat variety increased more. The optimal concentrations of K+ and Mg2+ treatment were 20 mmol/L and 10 mmol/L respectively,the effect of Mg2+ treatment was better than that of K+.
%K K+和Mg2+ 盐胁迫 荞麦幼苗 生理特性&lt
%K br&gt
%K K+ and Mg2+ Salt stress Buckwheat seedlings Physiological traits
%U http://xbnyxb.alljournals.cn/ch/reader/view_abstract.aspx?file_no=20150517&flag=1