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首页> 外文期刊>Journal of Experimental Botany >Review of sorption and diffusion of lipophilic molecules in cuticular waxes and the effects of accelerators on solute mobilities
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Review of sorption and diffusion of lipophilic molecules in cuticular waxes and the effects of accelerators on solute mobilities

机译：表皮蜡中亲脂性分子的吸附和扩散以及促进剂对溶质迁移率的影响的综述

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摘要

Many agrochemicals are applied to the leaf surfaces of crop plants. Systemic chemicals have to penetrate through the cuticle, which forms an effective transport barrier. The barrier properties of cuticles are mainly due to the cuticular waxes deposited as partially crystalline aggregates on the outer surfaces of leaves. Substances increasing the mobilities of agrochemicals in cuticular waxes are called accelerators and it is shown that they act as plasticizers when absorbed by cuticular waxes. They decrease the barrier properties of the waxes and thus increase the mobilities of the agrochemicals through them. In order to analyse the efficiency of different accelerators, the sorption and mobility of both agrochemicals and accelerators within cuticular waxes was measured. Such information was used to establish correlations between the internal concentrations of accelerators and their mobility-enhancing effects on agrochemicals in the cuticle. This, in turn, allowed the determination and comparison of the intrinsic effects of different accelerators and to rationalize the effect of accelerators on the cuticular permeability of agrochemicals. Results describing the sorption (partition coefficients) and mobility (diffusion coefficients) of lipophilic organic molecules in reconstituted cuticular waxes from different plant species, and the effect of two different classes of accelerators (alcohol ethoxylates and n-alkyl esters), on the mobility of organic molecules are presented and discussed.
机译：许多农用化学品被施用于农作物的叶子表面。全身性化学物质必须穿透表皮，形成有效的运输屏障。表皮的阻隔性能主要归因于表皮蜡以部分结晶的聚集体形式沉积在叶片的外表面上。表皮蜡中增加农用化学品迁移率的物质被称为促进剂，它被表皮蜡吸收后起增塑剂的作用。它们降低了蜡的阻隔性能，因此增加了农用化学品通过蜡的迁移率。为了分析不同促进剂的效率，测量了农药和促进剂在表皮蜡中的吸附和迁移率。这些信息用于建立促进剂内部浓度与其对角质层中农用化学品的流动性增强作用之间的相关性。反过来，这可以确定和比较不同促进剂的内在作用，并合理化促进剂对农用化学品的表皮渗透性的影响。结果描述了来自不同植物物种的重构表皮蜡中亲脂性有机分子的吸附（分配系数）和迁移率（扩散系数），以及两种不同类型的促进剂（醇乙氧基化物和正烷基酯）对苯甲酸酯迁移率的影响提出并讨论了有机分子。

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  • 来源
    《Journal of Experimental Botany》 |2006年第11期|2515-2523|共9页
  • 作者

    Lukas Schreiber;

  • 作者单位

    Institute of Cellular and Molecular Botany (IZMB) University of Bonn Kirschallee 1 D-53115 Bonn Germany;

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