Effect of paclobutrazal on the salt tolerance of Festuca arundinacea

The pot experiment was conducted to study the effect of paclobutrazal with different concentrations (200、400和600 mg/L) on the salt tolerance of Festuca arundinacea treated with 0.8% of NaCl. The results showed that the salt stress reduced the root length, dry matter biomass and relative water content in leaf, and increased the MDA content. However, the application of paclobutrazal after salt treatment could increase the dry matter biomass, root length and soluble sugar content. In addition, the paclobutrazal treatment decreased MDA accumulation in leaf. All the benefit from paclobutrazal application could be explained as the release of the salt stress in some extent. The concentration of 400 mg/L of paclobutrazal was the best.