Differential assimilation of nitrogen dioxide by 70 taxa of roadside trees at an urban pollution level.
Differential assimilation of nitrogen dioxide by 70 taxa of roadside trees at an urban pollution level.
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DOI：
10.1016/j.chemosphere.2005.03.033
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发表时间：
2005-11
期刊：
影响因子：
8.8
通讯作者：
Misa Takahashi;A. Higaki;M. Nohno;M. Kamada;Y. Okamura;Kunio Matsui;Shigekazu Kitani;H. Morikawa-H.
中科院分区：
文献类型：
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作者：
Misa Takahashi;A. Higaki;M. Nohno;M. Kamada;Y. Okamura;Kunio Matsui;Shigekazu Kitani;H. Morikawa-H.
为了筛选城市水平上植物缓解二氧化氮(NO2)的最佳物种，我们调查了70种主要用作行道树的木本植物对NO2的同化作用。用15N标记的NO2在0.1μ11−1中熏蒸8h，测定叶片中NO2的还原氮量(以mg Ng−1干重为单位)(以下称为NO2同化能力)。将数据与以前报道的在4μ11−1NO2下获得的数据进行了比较分析。在70个分类群中，对NO2的同化能力最高的(山李；0.061)和最低的(柳杉；0.0005)相差122倍。根据0.1和4μL−1NO2对NO2同化能力的分析，将70个木本植物类群划分为4种类型：高同化高NO2抗性、高NO2同化低NO2抗性、低NO2同化低NO2抗性和低NO2同化高NO2抗性。第一、第二、第三和第四类群分别包括13、11、35和11个分类群。与其他习性木本植物相比，阔叶落叶乔木可能具有生物量高、生长快的优点。因此，4种阔叶落叶树种刺槐、国豆杉、黑杨和山李是城市空气的最佳植物修复植物。
In order to screen for the best species for mitigating nitrogen dioxide (NO2) by plants at urban levels, we investigated assimilation of nitrogen dioxide by 70 taxa of woody plants that are mostly utilized as roadside trees. They were fumigated with15N-labeled NO2at 0.1μll−1for 8h, and the amount of reduced nitrogen derived from NO2(in mg Ng−1dry weight) in the leaves (designated NO2assimilation capability hereafter) were determined. Data were analyzed in the comparison with the previously reported ones obtained at 4μll−1NO2. Among the 70 taxa, the value of NO2assimilation capability differed by a factor of 122 between the highest (Prunus yedoensis; 0.061) and the lowest (Cryptomeria japonica; 0.0005). Based on the analysis of NO2assimilation capability values at 0.1 and 4μl−1NO2, the 70 taxa of woody plants appeared to be classified into four types; those of high NO2assimilation and high NO2resistance, those of high NO2assimilation but low NO2resistance, those of low NO2assimilation and low NO2resistance, and those of low NO2assimilation but high NO2resistance. The first, second, third and fourth types include 13, 11, 35 and 11 taxa, respectively. The broad-leaf deciduous trees may have advantages of high biomass and fast growth as compared with woody plants of other habits. Thus, four broad-leaf deciduous species, Robinia pseudo-acacia, Sophora japonica, Populus nigra and Prunus lannesiana, were concluded here to be the best phytoremediators for the urban air.