采用营养液水培法,用100、300和500mg·L-1不同浓度的水杨酸(SA)处理‘辽园多丽’番茄幼苗,测定在NaCl胁迫下番茄幼苗叶片果糖、葡萄糖、蔗糖含量和蔗谢代谢相关酶活性(酸性转化酶AI、中性转化酶NI、蔗糖磷酸合成酶SPS、蔗糖合成酶活性SS)的变化.结果表明:SA处理叶片可以维持或提高NaCl胁迫条件下番茄幼苗叶片果糖、葡萄糖含量及AI、NI、SPS和SS活性,其最高值分别比单纯NaCl处理植株增加30.0%、31.1%、24.7%、27.9%、22.0%和24.5%;但对NaCl胁迫条件下番茄幼苗叶片蔗糖含量的影响不大.表明水杨酸可以通过提高NaCl胁迫下番茄叶片转化酶活性来提高番茄叶片果糖和葡萄糖含量,从而缓解NaCl胁迫对番茄的伤害,其中以500mg.L-1的SA处理效果较理想. The nutrient solution hydroponics was used to treat ’Liao Yuen Dole’ tomato seedlings with 100, 300 and 500 mg · L -1 different concentrations of salicylic acid (SA). The contents of fructose, glucose and sucrose in tomato seedling leaves under NaCl stress And sucrose metabolism related enzymes (acid invertase AI, neutral invertase NI, sucrose phosphate synthase SPS, sucrose synthase activity SS). The results showed that: SA treatment leaves can maintain or enhance the tomato seedlings under NaCl stress The highest values ​​of leaf fructose, glucose content, AI, NI, SPS and SS activities were 30.0%, 31.1%, 24.7%, 27.9%, 22.0% and 24.5% The results showed that salicylic acid could increase the fructose and glucose content of tomato leaves by increasing the invertase activity of tomato leaves under NaCl stress so as to alleviate the damage to tomato by NaCl stress. Among them, 500mg.L-1 SA treatment effect is better.