氯化钠胁迫对玉米幼苗代谢的影响

Influence of NaCl Stress on the Metabolism of Maize Seedlings

通过砂培试验,分析了不同浓度氯化钠胁迫对5个玉米品种种子萌发和幼苗代谢的影响。结果表明,高浓度的氯化钠对玉米种子的发芽势、发芽率有一定的抑制作用。随着氯化钠浓度的升高,玉米幼苗体内的蛋白质含量降低,游离脯氨酸的含量升高,多酚氧化酶的活性随着氯化钠浓度升高而升高,但氯化钠的浓度超过0.6%时,多酚氧化酶的活性反而下降。

A sand culture was conducted to analyse effects of different concentration NaCl stress with five different maize varieties on germination and seedling metabolism.The results showed that higher concentration of NaCl stress has a certain degree inhibition for the germination energy and germination percentage.With the NaCl concentration increasing,the protein content of seedling became lower,and the proline content increased,and the PPO activity was rising up,when salt concentration exceeded 0.6%,the PPO activity was rising up, when salt concentration exceeded 0. 6%, the PPO activity declined instead.