颗粒物已成为中国城市首要污染物。植物能够吸收捕获空气中的颗粒物，从而改善并提高环境质量；另一方面长期生长在颗粒物污染环境下，植物的生长也会受到影响。融雪剂在中国北方广泛使用，由融雪剂转变形成的NaCl颗粒物对城市绿化植物生长产生了严重的影响，但其影响的机制尚需深入研究。本项目拟以北方常见的2种绿化树种-油松和银中杨作为研究对象，采用室内控制实验，研究在不同NaCl颗粒物浓度下植物叶片光合速率和水力导度的动态变化，确定其对NaCl颗粒物污染耐受的生态阈值；在其基础上，进一步分析植物叶片大小、比叶重、气孔形态、蜡质结构和叶片表面粗糙度的响应及其与生理性状的关系，最后从叶片功能性状响应的角度全面评价实验树种对NaCl颗粒物污染的适应性。该研究成果将为选择和优化城市绿化树种，降低空气中颗粒物质量浓度和提高城市空气环境质量提供数据和技术支持。

Particulate matter pollution had been a major problem in China City. The trees offered significant benefits in capturing particulate matter and improving urban air quality. However, Plant species growing under long-term atmospheric pollution environment were to be effected. Deicing slats were widely applied in urban areas of the Northeastern China, and the NaCl particulate matter from Deicing slats had a negative impact on the vegetation. There was little evidence regarding How to effect the plant species growing healthily and adapt. In this study, two common trees Pinus tabuliformis and Populus alba were used as the test samples, through control experiments, we firstly studied the photosynthetic rate and water transport rate change under the different NaCl particulate matter concentration. The tolerance threshold of trees was determined; Secondly, the characters of leaf surface and physiological ecology were monitored and quantified such as leaf mass per area, stomatal morphology, wax structure and leaf roughness; Lastly, According to the physiological and ecological response of leaf functional traits, we established an adaptive mixed model to evaluate Pinus tabuliformis and Populus alba adaptation. The results could provide scientific basis for benefiting the pollution control and improve urban air quality due to reasonable choose the urban plant species，which has huge theoretical and social significance.