Effects of exogenous melatonin on growth and physiological characteristics of Chinese Cabbage Seedlings under Aluminum Stress

摘要

The effects of exogenous melatonin on growth and physiological characteristics of Chinese cabbage seedlings under 50μmol/L aluminum stress were studied by spraying 5 different concentrations of MT (0、 50、 100、 200、 400) μmol·L~(-1) solution on leaves in Chinese cabbage seedlings. The result showed that exogenous melatonin could promote the growth of Chinese cabbage seedlings under aluminum stress, increase the biomass, water content, light and pigment content and soluble protein content; Improve the activity of SOD, POD and CAT; Reduce the MDA content. Therefore, exogenous MT could improve the stress tolerance of Chinese cabbage seedlings to aluminum stress and alleviate the damage caused by aluminum stress on Chinese cabbage seedlings, and the 200 μmol/L was the best concentration.