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首页> 外文期刊>Environmental Science & Technology >Investigating the Foliar Uptake and Within-Leaf Migration of Phenanthrene by Moss (Hypnum Cupressiforme) Using Two-Photon Excitation Microscopy with Autofluorescence
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Investigating the Foliar Uptake and Within-Leaf Migration of Phenanthrene by Moss (Hypnum Cupressiforme) Using Two-Photon Excitation Microscopy with Autofluorescence

机译：使用自发荧光的双光子激发显微镜研究苔藓（Hypnum Cupressiforme）对菲的叶吸收和叶内菲的迁移

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摘要

Mosses have the potential to play a significant role in the global cycling and fate of semivolatile organic compounds (SVOCs), due to their extensive distribution at high latitudes and the long-range atmospheric transport of SVOCs. Unlike vascular plants mosses lack a substantial cuticle, vascular system, or root structure, taking up water, nutrients and SVOCs primarily from the atmosphere. Mosses have thus been effectively used as passive air samplers for many SVOCs in urban and rural locations. The potential differences in atmospheric uptake and within-leaf movement, storage and processing of SVOCs between vascular and nonvascular living plants were investigated here by comparing the uptake and behavior of phenanthrene in spinach (Spinacia oleracea) and moss (Hypnum cupressiforme), using two-photon excitation microscopy coupled with autofluorescence. Chemical uptake, movement storage, and compartmentalization of phenanthrene was directly detected, visualized, and monitored over a 12 day period following exposure to gas phase phenanthrene. Species differences in the uptake of phenanthrene between moss and spinach leaves were observed, showing how morphological differences affect the foliar uptake of SVOCs. In spinach, phenanthrene accumulated within the cellular cytoplasm and vacuole. In moss, phenanthrene accumulated predominantly within the cell walls, before later migrating across the cell membrane into adjacent cells and the cellular cytoplasm. The study represents a further demonstration of how different plant species can display different and complex transport and storage pathways for the same chemical, and highlights the importance of the cellular structure and plant morphological and physiological features in controlling this behavior.
机译：苔藓由于其在高纬度的广泛分布和SVOC的远距离大气迁移，在半挥发性有机化合物（SVOC）的全球循环和命运中具有潜在的重要作用。与维管植物不同，苔藓缺乏实质的表皮，维管系统或根系结构，主要从大气中吸收水，养分和SVOC。因此，苔藓已被有效地用作城市和农村地区许多SVOC的被动空气采样器。通过比较菠菜（Spinacia oleracea）和苔藓（Hypnum cupressiforme）中菲的吸收和行为，研究了维管植物和非维管植物在大气中的摄取以及叶内运动，SVOC的存储和加工之间的潜在差异，使用两种方法光子激发显微镜结合自发荧光。在暴露于气相菲后的12天内，直接检测，可视化并监控了菲的化学吸收，移动存储和分隔。观察到苔藓和菠菜叶之间菲吸收的种类差异，表明形态差异如何影响SVOCs的叶吸收。在菠菜中，菲在细胞质和液泡中积累。在苔藓中，菲主要聚集在细胞壁内，然后再迁移穿过细胞膜进入相邻的细胞和细胞质。这项研究进一步证明了不同植物物种如何针对同一化学物质表现出不同且复杂的运输和储存途径，并强调了细胞结构以及植物形态和生理特征在控制这种行为中的重要性。

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  • 来源
    《Environmental Science & Technology》 |2009年第15期|5755-5761|共7页
  • 作者

    IAN KEYTE; EDWARD WILD; JOHN DENT; KEVIN C. JONES;

  • 作者单位

    Lancaster Environment Centre, Lancaster University, Lancaster, LA1 4YQ, U.K.;

    Lancaster Environment Centre, Lancaster University, Lancaster, LA1 4YQ, U.K.;

    Lancaster Environment Centre, Lancaster University, Lancaster, LA1 4YQ, U.K.;

    Lancaster Environment Centre, Lancaster University, Lancaster, LA1 4YQ, U.K.;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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