盐胁迫条件下实葶葱种子的萌发能力

为了解野生蔬菜实葶葱种子发芽过程中的耐盐特性，以实葶葱种子为材料，将NaCl、Na₂CO₃、Na₂SO₄及其混合液分别设为5个不同的浓度梯度，测定实葶葱种子在各种处理下的种子萌发能力。研究结果表明，不同种类盐，在相同浓度下对种子发芽的抑制率也完全不同，NaCl浓度为50 mmol/L时发芽率为25.3%，Na₂CO₃为15.33%，而Na₂SO₄为14%；混合盐溶液对种子发芽的影响极显著，发芽现象不明显，大多数种子都受到了抑制。说明，低浓度单盐和混合盐对实葶葱种子萌发的影响较小，实葶葱种子具有一定的耐盐性，在低浓度盐溶液中种子可以萌发，但随着浓度的提高，单盐及其混合液均抑制实葶葱种子的萌发，单盐溶液中对几种盐的耐受能力为NaCl＞Na₂CO₃＞Na₂SO₄，混合盐的抑制效果高于单盐。

The Seed Germination of Allium galanthum L. Under Salt Stress

In order to understand the salt tolerance characteristics of wild vegetable Allium galanthum L. seeds during the germination process, the seed of wild Allium galanthum L. was used as test material, made NaCl,Na2CO3, Na2SO4 and the mixture intofive different concentration gradients, to determinate the seed germination of Allium galanthum in all treatments. The results showed that different types of salt at the same concentration on seed germination had different inhibition rate. When NaCl concentration was 50 mmol/L, the germination rate was 25.3%, Na2CO3 was 15.33%, Na2SO4 was 14%; the mixed salt solution had significant impact on seed germination, but not obvious, most seeds were inhibited. The results indicated that the single low concentrations of salt and mixture salt had little effect on the seed germination, and Allium galanthum L. had some salt tolerance, it could germinate in lower concentrations of salt solution. But with salt concentration increased, NaCl, Na2CO3, Na2SO4 and the mixture inhibit the seed germination. In these single-salt solutions,the tolerance ability was NaCl〉Na2CO3〉Na2SO4, the mixture had higher inhibition than the single-salt solution.