丙酮醛对NaCl胁迫下番茄幼苗生长的影响

Effect of Methylglyoxal on Tomato Seedling Growth under NaCl Stress

以京番402为试验材料,采用叶面喷施的方法,研究了外源喷施丙酮醛溶液(0、5、10、20 mmol·L^(-1))对盐胁迫(150 mmol·L^(-1)NaCl)下番茄幼苗生长、光合作用以及抗氧化能力的影响。结果表明:NaCl处理显著抑制番茄幼苗生长,降低渗透调节及抗氧化能力;而在NaCl胁迫下喷施适宜浓度的外源丙酮醛能够促进番茄幼苗的生长,降低电解质外渗率,减少根和叶片中的丙酮醛和Na^(+)含量,同时根和叶片中的过氧化氢含量降低。综合来看,外源喷施20 mmol·L^(-1)丙酮醛对盐胁迫下番茄幼苗的缓解效果最佳,可以提高番茄幼苗的耐盐性。

In this study,‘Jingfan 402’as the test material to study the effects of exogenous spraying of methylglyoxal solution(0,5,10,20 mmol·L^(-1))on the growth,photosynthesis,and antioxidant capacity of tomato seedlings under salt stress(150 mmol·L^(-1) NaCl).The results showed that NaCl treatment significantly inhibited the growth,osmotic regulation,and antioxidant capacity of tomato seedlings,while spraying with asuitable concentration of exogenous acetone aldehyde under NaCl stress improved the growth of tomato seedlings,reduced electrolyte leakage,decreased the content of malonaldehyde and Na^(+)in roots and leaves,and reduced the content of hydrogen peroxide in leaves.Combined with the experimental data,exogenous spraying of 20 mmol·L^(-1) acetone aldehyde had the best mitigation effect on tomato seedlings under salt stress,and could improve the salt tolerance of tomato seedlings.