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研究了幼苗期低盐锻炼对水稻耐盐能力的影响。中国91和83－51幼苗经低盐（0.1％NaCl）锻炼后可降低盐处理（0．3％NaCl）对其生长的抑制；低盐刺激叶片超氧化物歧化酶和过氧化氢酶活性升高，从而在盐胁迫时保持较高活性；虽然低盐也使过氧化物酶活性、丙二醛含量以及Na+含量有一定程度的增加，但在盐胁迫时其增加速率明显减慢而低于未经低盐锻炼的苗株；相反，低盐锻炼时K+含量有所下降，但在盐胁迫时其下降幅度低于未经低盐锻炼的植株，至处理结束，两者水平接近。结果表明，幼苗期采用低盐锻炼的方法可以增强水稻的耐盐能力．这与低盐锻炼可在一定程度上增强地上部组织内清除活性氧的防护系统能力，使其在随后的盐胁迫过程中由活性氧诱导脂质过氧化作用产生的盐渍伤害减轻有关。
The effects of low salt stress on salt tolerance of rice seedlings were studied. Salt stress (0.3% NaCl) inhibited the growth of seedlings of 91 and 83-51 Chinese seedlings under salt stress (0.1% NaCl). The activity of superoxide dismutase and catalase increased High, so as to maintain high activity under salt stress. Although low salt also increased peroxidase activity, malondialdehyde content and Na + content to a certain extent, the increase rate of salt stress slowed down significantly, On the contrary, the content of K + decreased in low-salt training, but decreased more in salt-stress than that in low-salt-free plants. When the treatment was over, the levels of K + were similar. The results showed that the method of low salt stress during seedling stage can enhance the salt tolerance of rice. This may be related to the low-salt exercise to some extent enhance the ability of reactive oxygen species scavenging system in the above-ground tissues to reduce the salt damage caused by lipid peroxidation induced by reactive oxygen species during the subsequent salt stress.