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首页> 美国卫生研究院文献>Wiley-Blackwell Online Open >Emission of methane carbon monoxide carbon dioxide and short‐chain hydrocarbons from vegetation foliage under ultraviolet irradiation
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Emission of methane carbon monoxide carbon dioxide and short‐chain hydrocarbons from vegetation foliage under ultraviolet irradiation

机译：紫外线照射下植被叶片中甲烷一氧化碳二氧化碳和短链碳氢化合物的排放

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摘要

The original report that plants emit methane (CH 4) under aerobic conditions caused much debate and controversy. Critics questioned experimental techniques, possible mechanisms for CH 4 production and the nature of estimating global emissions. Several studies have now confirmed that aerobic CH 4 emissions can be detected from plant foliage but the extent of the phenomenon in plants and the precise mechanisms and precursors involved remain uncertain. In this study, we investigated the role of environmentally realistic levels of ultraviolet (UV) radiation in causing the emission of CH 4 and other gases from foliage obtained from a wide variety of plant types. We related our measured emissions to the foliar content of methyl esters and lignin and to the epidermal UV absorbance of the species investigated. Our data demonstrate that the terrestrial vegetation foliage sampled did emit CH 4, with a range in emissions of 0.6–31.8 ng CH 4 g−1 leaf DW h−1, which compares favourably with the original reports of experimental work. In addition to CH 4 emissions, our data show that carbon monoxide, ethene and propane are also emitted under UV stress but we detected no significant emissions of carbon dioxide or ethane.
机译：植物在有氧条件下排放甲烷（CH 4）的原始报告引起了很多争论和争议。批评者质疑实验技术，CH 4产生的可能机制以及估算全球排放的性质。现在有几项研究证实，可以从植物叶片中检测出好氧CH 4排放，但是这种现象在植物中的范围以及涉及的确切机理和前体仍然不确定。在这项研究中，我们调查了环境现实水平的紫外线（UV）辐射在导致从多种植物类型获得的叶子中释放CH 4和其他气体方面的作用。我们将测得的排放量与甲酯和木质素的叶面含量以及所调查物种的表皮紫外线吸收率相关。我们的数据表明，采样的陆地植被叶子确实排放了CH 4，排放范围为0.6–31.8 ng CH 4 g −1 叶片DW h -1 ，与实验工作的原始报告相比。除CH 4排放外，我们的数据显示一氧化碳，乙烯和丙烷在紫外线胁迫下也会排放，但我们未发现二氧化碳或乙烷的大量排放。

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