This study explored the interspecies and seasonal variation of polycyclic aromatic hydrocarbons (PAHs) in the extracted lipids of the leaves of seven local plants in an urban environment of Kolkata (22°33′N and 88°20′E), India. Based on the degree of toxicity and carcinogenicity (expressed in terms of their Benzo(a)pyrene equivalent (${\text{BaP}}_{\text{eq}}$) concentrations) the overall foliar-PAH accumulation during the study period (September 2018‒;August 2019) in the various plants showed the following order: Nerium oleander (80.96 $\pm$ 30.08 $\text{ng}.{\text{g}}_{\text{dw}}^{-1}$) > Mangifera indica (74.15 $\pm$ 20.34 $\text{ng}.{\text{g}}_{\text{dw}}^{-1}$) > Lantana aculeata (60.13 $\pm$ 21.71 $\text{ng}.{\text{g}}_{\text{dw}}^{-1}$) > Thevetia peruviana (40.97 $\pm$ 12.45 $\text{ng}.{\text{g}}_{\text{dw}}^{-1}$) > Ixora coccinea (38.11 $\pm$ 9.5 $\text{ng}.{\text{g}}_{\text{dw}}^{-1}$) > Murraya paniculata (37.1 $\pm$ 7.35 $\text{ng}.{\text{g}}_{\text{dw}}^{-1}$) > Polyalthia longifolia (25.72 $\pm$ 5.71 $\text{ng}.{\text{g}}_{\text{dw}}^{-1}$). The PAHs like phenanthrene, anthracene, fluoranthene, pyrene, benzo(a)anthracene, chrysene, benzo (b+k)fluoranthene, benzo(a)pyrene, benzo [ghi]perylene and indeno [1,2,3-cd]pyrene were predominant during the study period over the PAHs like naphthalene, acynaphthylene, acenaphthene, fluorine and dibenz [a,h]anthracene in the extracted lipids. The temperature-dependent partitioning of the PAHs onto leaf-surface and photo-degradation could have affected the availability of the PAHs. The foliar PAH accumulation varied seasonally as winter (December–February) > postmonsoon (September–November) > premonsoon (March–May) > monsoon (June–August). The leaf epicuticular wax determined the PAH uptake and storage, which in turn was affected by the temperature and solar radiation. In consistence with the idea of “nature-based solutions” for deteriorated air quality remediation in an urban environment, this study could be a promising initiative to build up cost-effective biological filters to combat the airborne pollutants and improve urban air quality.

本研究探讨了印度加尔各答（22°33'N和88°20'E）的城市环境中七种本地植物的叶片提取脂质中多环芳烃（PAHs）的种间和季节变化。根据毒性和致癌性程度（以苯并（a）py当量表示（${\text{钡}}_{\text{当量}}$）浓度）研究期间（2018年9月‒; 2019年8月）在各种植物中总的叶面PAH积累表现出以下顺序：夹竹桃（80.96$\pm$ 30.08 $\text{ng}。{\text{G}}_{\text{dw}}^{-\mathrm{1个}}$）> 印度芒果（74.15$\pm$ 20.34 $\text{ng}。{\text{G}}_{\text{dw}}^{-\mathrm{1个}}$）> 马Lan丹（60.13$\pm$ 21.71 $\text{ng}。{\text{G}}_{\text{dw}}^{-\mathrm{1个}}$）>  Thevetia peruviana（40.97$\pm$ 12.45 $\text{ng}。{\text{G}}_{\text{dw}}^{-\mathrm{1个}}$）> 墨西哥洋蓟（38.11$\pm$ 9.5 $\text{ng}。{\text{G}}_{\text{dw}}^{-\mathrm{1个}}$）>  Murraya paniculata（37.1$\pm$ 7.35 $\text{ng}。{\text{G}}_{\text{dw}}^{-\mathrm{1个}}$）> 长白花（25.72$\pm$ 5.71 $\text{ng}。{\text{G}}_{\text{dw}}^{-\mathrm{1个}}$）。多环芳烃如菲，蒽，荧蒽，pyr，苯并（a）蒽，，苯并（b + k）荧蒽，苯并（a）py，苯并in和茚并[1,2,3-cd] py在研究期间，提取的脂质中的萘，乙炔基、,、氟和苯并[a，h]蒽等多环芳烃占主导地位。PAHs在叶片表面的温度依赖性分配和光降解可能已经影响了PAHs的可用性。随着冬季（12月至2月）>季风后（9月至11月）>季风（3月至5月）>季风（6月至8月），叶面PAH积累随季节变化。叶片表皮蜡决定了PAH的吸收和储存，进而受温度和太阳辐射的影响。