过路黄对低温胁迫的生理反应

Effect of Low-Temperature Stress on Physiological Reaction of Lysimachia christinae

为探明过路黄低温致伤的生理特性,为其引种北移、栽培推广提供理论依据,研究了在低温(10,5,0,-5℃)胁迫下过路黄叶片内部生理生化反应的变化情况.结果表明,在低温胁迫下,过路黄叶片的质膜透性、保护酶活性和渗透调节物质均有明显的变化.在试验处理范围内,随着低温胁迫程度的加深和时间的延长,过路黄叶片的质膜透性上升;超氧化物歧化酶(SOD)活性先上升,后下降;游离脯氨酸(Pro)含量有明显增加;丙二醛(MDA)含量呈逐渐上升趋势.

In order to investigate the physiological characteristics of Lysimachia christinae Hance under low-temperatures, and its theory basis for introducing this plant to the north and extending the planting area. Variations of the inner physiological biochemistry of its leaf cells under low-temperature stress of 10, 5, 0, -5℃ treatment, with 20℃ as control were observed. Results showed that the low-temperature stress treatment resulted in membrane damage and the increasing of membrane permeability of leaf cells： the activities of SOD increased and then declined： the content of proline in the leaves of Lysimachia christinae increased obviously with the falling of the temperature and the passing of the time; the contents of MDA in leaves increased continuously in the experiment.