高温对红掌幼苗叶片茉莉酸浓度及抗氧化系统的影响

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

试验研究30℃和38℃高温处理对红掌幼苗叶片茉莉酸(JAs)浓度及抗氧化系统的影响,结果表明:38℃高温处理6h,叶片内JAs浓度急剧升高,其后又呈下降趋势,但其浓度仍高于对照;30℃高温处理12h,叶片内JAs浓度达最大值,之后随处理时间的延长而降低,但仍高于对照。高温处理后叶片抗氧化系统中的过氧化物酶(POD)、超氧化物歧化酶(SOD)活性均有不同程度升高,O 2含量在高温处理的前期有所降低,后期又逐渐升高。一定程度的高温处理可通过提高JAs浓度和抗氧化酶活性来提高红掌幼苗的抗热性。

The effect of high temperature （30℃ and 38℃ ） on jasmonic acids （JAs） concentrations and antioxidation of Anthuriurn andraeanurn seedling leaf was studied. JAs concentrations in the leaves are initially drastically enhanced at a temperature of 38℃ for a period of 6 h, 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 12 h. 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.