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以实葶葱种子为试材,研究了盐胁迫对实葶葱种子萌发的影响。试验采用不同浓度的NaCl和Na2SO4对实葶葱种子进行盐胁迫处理,测定其种子发芽率、发芽势、发芽指数。结果表明,在NaCl浓度为1 000mg/L时,实葶葱种子的发芽率、发芽势和发芽指数高于对照,当NaCl浓度超过2 000mg/L时受到抑制;Na2SO4浓度在1 000,2 000mg/L时,种子的发芽率、发芽势、发芽指数高于对照,当Na2SO4浓度超过4 000mg/L时出现明显抑制作用,种子的发芽率、发芽势、发芽指数等指标均呈明显下降趋势;NaCl对种子发芽率的抑制强于Na2SO4。随NaCl和Na2SO4浓度增加实葶葱种子的萌发逐渐降低;试验结果表明,实葶葱种子萌发期间具有较强的耐盐性。
The seed of Allium mongolicum was used as experimental material to study the effect of salt stress on the germination of Allium mongolicum seeds. Experiments were conducted using different concentrations of NaCl and Na2SO4 on the seedlings of salt-stress treatment of seedlings, determination of the seed germination rate, germination potential, germination index. The results showed that when the NaCl concentration was 1 000 mg / L, the germination rate, germination energy and germination index of Allium mongolicum seeds were higher than those of the control, and were inhibited when the NaCl concentration exceeded 2 000 mg / L; the concentration of Na2SO4 was 1 000 and 2 000 mg / L, the seed germination rate, germination potential and germination index were higher than those of the control. When the Na2SO4 concentration exceeded 4 000 mg / L, the seed germination rate, germination potential and germination index decreased significantly. NaCl inhibited the seed germination rate more than Na2SO4. With the increase of NaCl and Na2SO4 concentration, the seed germination of Allium mongolicum decreased gradually. The results showed that the seed germination of Allium mongolicum had strong salt tolerance.