Effect of high temperature on jasmonic acid (JA) concentration and antioxidation of Anthurium andraeanum seedling leaf

The effect of high temperature (30℃ and 38℃) on jasmonic acids (JAs) concentrations and antioxidation of Anthurium andraeanum seedling leaf was studied. JAs concentrations in the leaves are initially drastically enhanced at a temperature of 38℃ for a period of 6h, after that they decline but still remain higher than the control. The trend of change of JAs concentrations at 30℃ is the same as that at 38℃, but however, reaches peak concentration in 12h. The activities of antioxidant enzymes, including peroxidase (POD) and superoxide dismutase (SOD) are heighten to a certain level and O^-₂ content decreases initially, but then increases in the latter phase. Thus high temperature treatments can induce thermo-tolerance through enhancement of JAs concentrations and activities of antioxidative enzymes.