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采用不同浓度NaCl(30、60、90、120、150、180 mmol/L)对富农1号玉米种子进行盐胁迫处理,测定其幼苗生长及生理指标的变化。结果表明,随NaCl浓度的增加,玉米幼苗的苗高、根长和根冠比都明显下降,当NaCl浓度增加到180 mmol/L时,幼苗基本枯死。幼苗叶片中脯氨酸和丙二醛(MDA)含量随NaCl浓度的增加而上升,且高浓度下上升幅度大于低浓度,60～90 mmol/L NaCl浓度是该玉米品种的耐盐临界点。
Salt stress was applied to the seed of Fenong No.1 corn with different concentrations of NaCl (30, 60, 90, 120, 150 and 180 mmol / L), and their seedling growth and physiological indexes were measured. The results showed that seedling height, root length and root / shoot ratio of maize seedlings decreased significantly with the increase of NaCl concentration. When the NaCl concentration was increased to 180 mmol / L, the seedlings basically died. The content of proline and malondialdehyde (MDA) in seedling leaves increased with the increase of NaCl concentration, and the increase rate was higher than the low concentration at high concentration. The salt tolerance of 60-90 mmol / L NaCl was the critical salt tolerance point of this corn variety.