植物叶片吸收挥发性有机化合物的模型:吸收途径中最具影响力的部位

IF 3.8 Q2 ENVIRONMENTAL SCIENCES
Mizuki Yamane, Akira Tani
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引用次数: 0

摘要

植物叶片吸收某些种类的挥发性有机化合物(VOCs),并能促进空气净化,最近在ppb(v/v)环境现实浓度下进行的接触实验揭示了这一点。然而,植物吸收挥发性有机化合物的机制仍不清楚。在本研究中,我们将菲克第一扩散定律应用于植物叶片的挥发性有机化合物吸收模型,以解释挥发性有机化合物通过气孔、气液分区、质膜分区以及挥发性有机化合物在植物细胞中的代谢转化的扩散过程。利用之前报告的三种植物对脂肪族醛类和酮类的吸收数据以及从叶片横截面显微照片中获得的叶片形态参数,确定了各个部位的阻力和挥发性有机化合物的浓度。代谢部位的阻力最大(rmet),这表明挥发性有机化合物的代谢能力是影响挥发性有机化合物吸收的最大因素。气孔(rs)或质膜(rpl)的阻力次之,具体取决于化合物种类。利用 Q. acutissima 的吸收率数据,可以发现甲基乙烯酮的代谢部位阻力 rmet 受光照强度的影响。因此,我们的挥发性有机化合物吸收模型可以确定不同挥发性有机化合物和植物物种在吸收途径中影响最大的部位。我们的模型有助于开发基于植物的空气污染控制策略。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

An absorption model of volatile organic compound by plant leaf: The most influential site in the absorption pathway

An absorption model of volatile organic compound by plant leaf: The most influential site in the absorption pathway

Plant leaves absorb some kinds of volatile organic compounds (VOCs) and can contribute to air purification, as revealed by recent exposure experiments conducted at environmentally realistic concentrations in ppb (v/v). However, the mechanisms underlying VOC absorption by plants remain unclear. In this study, we applied Fick's first law of diffusion to a VOC absorption model for plant leaves to account for the VOC diffusion process via stomata, air-liquid partitioning, partitioning into the plasma membrane, and metabolic conversion of the VOC in plant cells. The resistance and concentration of VOCs at individual sites were determined using previously reported absorption data for aliphatic aldehydes and ketones in three plant species and the leaf morphology parameters obtained from leaf cross-section micrographs. The highest resistance occurred at the metabolic site (rmet), suggesting that VOC metabolic capacity is the most influential factor in VOC absorption. The resistance of stomata (rs) or plasma membrane (rpl) was the second highest, depending on compound family. Using the absorption rate data of Q. acutissima, it is revealed that metabolic site resistance rmet for methyl vinyl ketone is affected by light intensity. Thus, our VOC absorption model can determine the most influential site in the absorption pathway both for different VOCs and plant species. Our model can contribute to the development of plant-based strategies for controlling air pollution.

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来源期刊
Atmospheric Environment: X
Atmospheric Environment: X Environmental Science-Environmental Science (all)
CiteScore
8.00
自引率
0.00%
发文量
47
审稿时长
12 weeks
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