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纳米颗粒在紫苏叶片表面悬滴中的吸附及其通过气孔途径的渗透。

Adsorption of nanoparticles suspended in a drop on a leaf surface of Perilla frutescens and their infiltration through stomatal pathway.

机构信息

Department of Mechanical Engineering, Center of Biofluid and Biomimic Research, Pohang University of Science and Technology (POSTECH), 77, Cheongam-ro, Nam-gu, Pohang-si, Gyeongsangbuk-do, Republic of Korea.

Division of Mechanical Engineering for Creative Emerging Technologies, Center of Biofluid and Biomimic Research, Pohang University of Science and Technology (POSTECH), 77, Cheongam-ro, Nam-gu, Pohang-si, Gyeongsangbuk-do, Republic of Korea.

出版信息

Sci Rep. 2021 Jun 2;11(1):11556. doi: 10.1038/s41598-021-91073-x.

DOI:10.1038/s41598-021-91073-x
PMID:34079002
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8172645/
Abstract

Particulate matter (PM) has become a severe environmental issue, and ultrafine PM particles such as PM or PM can cause various complications and respiratory diseases to human beings. In particular, heavy metals contained in PM particles can contaminate edible plants; for example, plant leaves are exposed to PM particle-laden raindrops. The contaminated edible plants can injure the human health by ingestion, so a detailed understanding on the accumulation of PM particles inside edible plants is essential. In this study, we investigate the infiltration of PM particles in plant tissues with a hypothesis that ultrafine PM particles are absorbed through stomatal pathways. As an edible test plant, Perilla frutescens is selected. Drops of gold nanoparticle (AuNP) suspension are deposited on a leaf of P. frutescens to simulate the scenario where PM particle-laden raindrops fall on patulous stomata of the test plant. To examine AuNP adsorption on the P. frutescens foliar surface and diffusional AuNP absorption through stomatal apertures, we investigate three physical dynamics of AuNPs suspended in a sessile drop: sedimentation, evaporation-driven convective flow, and shrinkage of the drop interface. Quantitative information on the 3D spatial distribution of AuNPs in plant tissues was measured by X-ray imaging and two-photon excitation microscopy.

摘要

颗粒物（PM）已成为严重的环境问题，超细 PM 颗粒（如 PM 或 PM）可导致人类出现各种并发症和呼吸道疾病。特别是 PM 颗粒中所含的重金属会污染可食用植物；例如，植物叶片会暴露在含有 PM 颗粒的雨滴中。受污染的可食用植物可通过摄入伤害人体健康，因此详细了解 PM 颗粒在可食用植物内部的积累情况至关重要。在这项研究中，我们提出了一个假设，即超细 PM 颗粒是通过气孔途径被吸收的，以此来研究 PM 颗粒在植物组织中的渗透。选择紫苏作为食用测试植物。将金纳米颗粒（AuNP）悬浮液滴沉积在紫苏叶片上，以模拟 PM 颗粒污染的雨滴落在测试植物张开的气孑 L 上的情况。为了研究 AuNP 在紫苏叶表面的吸附以及通过气孔开口的扩散 AuNP 吸收，我们研究了悬浮在液滴中的 AuNP 的三种物理动力学：沉降、蒸发驱动的对流和液滴界面收缩。通过 X 射线成像和双光子激发显微镜测量了植物组织中 AuNP 的三维空间分布的定量信息。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/57a1/8172645/a30e0f93bacc/41598_2021_91073_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/57a1/8172645/ed88f9f27d7d/41598_2021_91073_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/57a1/8172645/448daee5aca9/41598_2021_91073_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/57a1/8172645/86df66c08f4b/41598_2021_91073_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/57a1/8172645/344968729eec/41598_2021_91073_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/57a1/8172645/a6e918778888/41598_2021_91073_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/57a1/8172645/a30e0f93bacc/41598_2021_91073_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/57a1/8172645/ed88f9f27d7d/41598_2021_91073_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/57a1/8172645/448daee5aca9/41598_2021_91073_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/57a1/8172645/86df66c08f4b/41598_2021_91073_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/57a1/8172645/344968729eec/41598_2021_91073_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/57a1/8172645/a6e918778888/41598_2021_91073_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/57a1/8172645/a30e0f93bacc/41598_2021_91073_Fig6_HTML.jpg

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