水杨酸浸种对甜菜丛根病防御酶系的诱导作用

Induction to Defense Enzymes of Rhizomania in Sugarbeet Soaking Seeds with Salicylic Acid

用不同浓度的水杨酸(SalicylicAcid-SA)对甜菜抗(耐)、感丛根病品种进行浸种处理,研究了SA对丛根病地甜菜防御酶系活性的影响。结果表明,浸种处理的甜菜叶片中过氧化物酶(POD)、多酚氧化酶(PPO)、苯丙氨酸解氨酶(PAL)活性较对照均有所提高,病情指数下降,根产量、含糖率和产糖量都有所增加。不同的SA处理浓度相比较,抗(耐)病品种适宜浓度为3mmol/L,感病品种适宜浓度为5mmol/L。

In this experiment, the seeds of sugar beet varieties with Rhizomania resistance and susceptibility were soaked with different salicylic acids concentrations to test the influence on the activities of defense enzymes in occurring disease soil. The results showed that the activities of POD, PPO and PAL from sugarbeet leaves by soaking seeds with salicylic acid were higher than that of non-treated ones. The disease index was declined, whereas, the root yield, sugar content and sugar yield were increased. A comparison of the treatments with different salicylic acids concentrations indicated that the optimum concentration on the resistant varieties was 3mmol/L but the susceptible ones was 5mmol/L.