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首页> 美国卫生研究院文献>Dose-Response >Dependence of Guaiacol Peroxidase Activity and Lipid Peroxidation Rate in Drooping Birch (Betula pendula Roth) and Tillet (Tilia cordata Mill) Leaf on Motor Traffic Pollution Intensity
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Dependence of Guaiacol Peroxidase Activity and Lipid Peroxidation Rate in Drooping Birch (Betula pendula Roth) and Tillet (Tilia cordata Mill) Leaf on Motor Traffic Pollution Intensity

机译：下垂桦（Betula pendula Roth）和Tillet（Tilia cordata Mill）叶中愈创木酚过氧化物酶活性和脂质过氧化速率对机动车交通污染强度的依赖性

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摘要

Hormesis and paradoxical effects are frequently found for different plant parameters. These phenomena were also observed for lipid peroxidation (LP) rate at environmental pollution. However, the role of antioxidant enzymes, particularly guaiacol peroxidases (GPX), in a nonmonotonic variation in the LP rate remains insufficiently explored. Therefore, dependence of GPX activity and LP rate in Betula pendula and Tilia cordata leaf on motor traffic pollution intensity was studied. Regression analysis revealed dependences of LP rate and GPX activity on traffic intensity. In B pendula, GPX activity enhanced significantly (up to 2.8 times relatively control) under increased traffic that induced biphasic paradoxical effect for LP rate. In the first phase, LP level increased in comparison with the control, and in the second phase, it was normalized by enhanced GPX activity. In T cordata, dependences of GPX activity and LP rate on traffic pollution were paradoxical effects. However, there was no connection between change of GPX activity and LP rate under middle- and high-level pollution: LP level reduced relatively the control or normalized even if GPX activity was lower than the control. This indicates that in T cordata, other regulatory mechanisms instead of GPX were activated which could control LP rate under middle- and high-level pollution.
机译：对于不同的植物参数，经常发现兴奋效应和矛盾效应。在环境污染下，脂质过氧化（LP）速率也观察到了这些现象。但是，抗氧化剂酶，特别是愈创木酚过氧化物酶（GPX）在LP率的非单调变化中的作用仍未得到充分研究。因此，研究了西南桦和紫ilia叶中GPX活性和LP率对机动车交通污染强度的依赖性。回归分析显示LP速率和GPX活动对交通强度的依赖性。在B摆中，GPX活性在增加的交通量下显着增强（相对于对照，达到2.8倍），从而引起LP率的双相悖论效应。在第一阶段，与对照组相比，LP水平升高，而在第二阶段，通过增强的GPX活性将其标准化。在番茄中，GPX活性和LP率对交通污染的依赖性是矛盾的。但是，在中高水平污染下，GPX活性的变化与LP率之间没有联系：即使GPX活性低于对照，LP含量也相对降低了对照或已恢复正常。这表明在T形线虫中，激活了其他调控机制而不是GPX，可以控制中高污染水平下的LP率。

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