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首页> 外文期刊>Biology Bulletin >Polycyclic Aromatic Hydrocarbons in Betula nana (Betulaceae, Magnoliopsida) under Exposure to a Thermal Power Plant
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Polycyclic Aromatic Hydrocarbons in Betula nana (Betulaceae, Magnoliopsida) under Exposure to a Thermal Power Plant

机译：在暴露于火电厂的白桦纳纳（Betulaceae，Magnoliopsida）中的多环芳烃

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The content of polycyclic aromatic hydrocarbons (PAH) in Betula nana L. and soil organogenic horizons was studied at a control site and sites affected by a thermal power station (TPS) at distances of 0.5, 1, and 1.5 km from the source of pollution. The PAH distribution over the vegetative organs of the dwarf birch was irregular. Different organs of the dwarf birch had similar qualitative composition of PAHs. No significant changes were detected in the PAH content in dwarf birch organs and on the surface of these organs at different distances from the TPS. The PAH content in the organs of plants affected by the TPS was 2-3 times higher than the background value, and the highest excess was found in leaves. The surface PAH concentration on the bark and roots increased threefold under contamination. No excess was revealed in the leaves and branches. The excess over the background value in the soil at contaminated sites was 3-3.5 times with the maximal accumulation at a distance of 1 km. The PAH content in the soil was three times higher than that in the dwarf birch at the control site and 5-6 times that at the contaminated sites. A strong correlation exists between the PAH concentrations in the soil and in B. nana. In the leaves and branches of B. nana, the proportion of surface accumulation in the total PAH pool was found to decrease at contaminated sites as compared with the control site. The opposite trend was observed for the bark and roots. Cluster analysis showed a clear separation between the surface and total PAH content in all plant organs under study. Factor analysis of the total PAH content in the organs of the dwarf birch allowed us to determine three main factors affecting the PAH distribution, with the light structures, toxic components, and the other PAHs were allocated in separate groups. Dwarf birch organs can be used as indicators for the contamination level in tundra communities. We suggest using the PAH content in leaves in order to analyze short-term changes in the PAH content and in the bark to assess the long-term impact.
机译：在距离污染源0.5,1，距离污染源的距离下，研究了Betula Nana L.和土壤有机烃地平线中的多环芳烃和土壤通差相的含量。 。在矮桦桦树的营养器官上分布不规则。 Dwarf桦树的不同器官具有类似的PAHS定性组成。在Dwarf桦木机器官的PAH含量和来自TPS的不同距离的表面上没有检测到显着的变化。受TPS影响的植物的器官中的PAH含量比背景值高2-3倍，并且在叶子中发现了最高的过量。在树皮上的表面PAH浓度增加了污染下的三倍。叶子和树枝上没有过量透露。在污染的位点的土壤中的背景值超过3-3.5次，最大累积在1公里处。土壤中的PAH含量比对照部位的Dwarf桦木中的含量高三倍，在污染的地方5-6次。在土壤中的PAH浓度和B. NANA之间存在强烈的相关性。在B. Nana的叶子和分支中，与对照部位相比，发现总PAH池中的表面积累的比例降低。为树皮和根部观察到相反的趋势。聚类分析显示，在研究中的所有植物器官中的表面和总PAH含量之间存在明显的分离。因子分析矮人桦树的器官中的总PAH含量允许我们确定影响PAH分布的三个主要因素，用光结构，有毒成分，以及在单独的组中分配其他PAHS。矮人桦木器官可以用作苔原社区中污染水平的指标。我们建议使用叶中的PAH内容，以分析PAH含量和树皮中的短期变化，以评估长期影响。

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