| Abstract:In order to explore the effect of salicylic acid (SA) on growth of the watermelon seedling under aluminum stress,the water culture method was used to treat the watermelon seedlings with different SA concentration (10 μmol/L,50 μmol/L) under aluminum stress (500 μmol/L). The effects of different SA concentrations on the root elongation and fresh mass,the degree of plasma membrane peroxidation and the absorption of nutrients were studied. The results showed that exogenous SA could effectively alleviate the effect of aluminum stress on root length and fresh mass of watermelon seedlings,could reduce the level of plasma membrane peroxidation and alleviate the absorption obstacles of Na,K,Mg,CA,etc. Among them,10 μmol/L SA had the best effect. Under Al stress,the alleviating effects on root length inhibition,root fresh mass and root MDA contentwere were 62.7%,108.9% and 29.6%,respectively，at the same time,it could promote the balance of Na,K,Mg,CA in plants. |
