小麦高温抗条锈性表达与苯丙氨酸解氨酶和多酚氧化酶活性的关系

测定了小麦高温抗条锈性表达过程中小麦叶内苯丙氨酸解氨酶和多酚氧化酶的活性变化。结果表明，高温抗条锈性品种，在小麦高温抗条锈性表达过程中，接种寄主叶内PAL活性对高温非常敏感。在高温处理12h时PAL活性就很快增高，到24h就达到活性高峰，形成一个对高温敏感的特异峰，且该峰可以从高温处理12h持续到72h。小种专化抗锈性的PAL活性也较对照增高，但对温度处理没有明显的活性峰。多酚氧化酶在高温抗条锈性表达过程中变化与对照无明显变化。

Relation between the High temperature Resistance to Stripe Rust of Wheat and Phenylalanine Ammonia Lyase and Polyphenol Oxidase

The changes of the activity of PAL (phenylalanine ammonialyase) and PPO (polyphenol oxidase) were tested during the expression of high temperature resistance to stripe rust in wheat. The results showed that the PAL activity in the high temperature resistance varieties was very sensitive to high temperature treatment. The PAL activity of the high-temperature resistance varieties began increase in 12 h high temperature treatment, and till 24 h high temperature treatment, the PAL activity value attained maximum, formed a apex, which was sensitive to high temperature treatment. Therefore, there were nearly relationship between high temperature resistance and PAL activity in high temperature resistance varieties. The PPO activity had no evidence difference between the high temperature resistance treatment and compatible check.