盐胁迫下小麦体细胞杂种与亲本小麦幼苗的生长量和Na+、K+含量比较

Differences in the Growth and Contents of Na+ and K+ between Somatic Hybrid Wheat and Its Wheat Parent under Salt Stress

摘要:

对小麦体细胞杂种F6株系Ⅰ-1-3和其亲本小麦济南177的幼苗在不同NaCl浓度处理6d时的生长量和Na^{+、K+含量进行了比较。结果表明:盐胁迫下杂种的生长量明显高于亲本小麦。随着盐浓度的增加,杂种和亲本的叶、茎和根中Na+含量均增加,但杂种叶与茎的Na+含量显著低于亲本,而根的却高于亲本,这可能提示杂种根部液泡较亲本有较强的储Na+功能。受盐胁迫的杂种叶与茎中K+含量显著高于亲本, K+/Na+比值高。杂种的Na+净积累速率也高于亲本。可见杂种比亲本小麦有更强的耐盐性。}

Abstract:

The seedlings of somatic hybrid wheat (Ⅰ-1-3) (Triticum aestivum × Agropyron elongatum) and its wheat parent (Jinan 177) were treated with different concentrations of NaCl to investigate the growth and Na^{+ and K+ contents in leaves, stems and roots. It was shown that the seedling weight of somatic hybrid was higher than that of wheat parent after treatment with salt for 6 days. The Na+ content both in hybrid and in wheat parent increased as NaCl concentration increased, but the Na+ content in the leaves and stems of the hybrid was significantly lower than that of the wheat parent．On the contrary．Na+ content in the roots of hybrid was higher．It implied that the hybrid had more vacuole compartment for sodium than the parent．However, the content in the leaves and stems of the hybrid was higherthan that in the wheat parent．Net Na+ uptake in hybrid was slightly higher than that in parent．It is indicated that the hybrid line possesses higher salt tolerance than the wheat parent.}