Institute of Botany, University of the Punjab, Lahore, Pakistan.
Department of Botany, Faculty of Sciences, University of Agricuture, Faisalabad, Pakistan.
Bull Environ Contam Toxicol. 2021 Nov;107(5):946-954. doi: 10.1007/s00128-021-03368-4. Epub 2021 Oct 9.
This study determined the effects of traffic pollutants on plants (Nerium oleander and Ricinus communis) growing along Faisalabad to Okara (R-1) and Okara to Lahore (R-2) roads in Pakistan. The photosynthetic pigments, photosynthetic rate, transpiration rate and total soluble proteins of roadside vegetation were significantly lower than control plants (50 m away from road). The average decrease in photosynthetic rate of Nerium oleander and Ricinus communis was 33.90% and 27.94% along R-1 and 41.85% and 32.409% along R-2 road, respectively. The decreased photosynthesis in roadside flora resulted in higher water use efficiency and substomatal CO concentration. However, higher antioxidant activity and free amino acid contents were noted in roadside plants that might be due to their defensive response to traffic pollutants. N. oleander was more affected by traffic pollutants and R. communis showed more resistance. Thus, N. oleander could be used for biomonitoring and R. communis for phytoremediation of vehicular pollution.
本研究测定了交通污染物对巴基斯坦费萨拉巴德至奥卡拉（R-1）和奥卡拉至拉合尔（R-2）道路沿线生长的植物（夹竹桃和蓖麻）的影响。与对照植物（距道路 50 米处）相比，路边植被的光合色素、光合速率、蒸腾速率和总可溶性蛋白明显降低。沿 R-1 道路，夹竹桃和蓖麻的光合速率平均下降 33.90%和 27.94%，沿 R-2 道路则分别下降 41.85%和 32.409%。路边植物光合作用的下降导致更高的水分利用效率和亚气孔 CO 浓度。然而，在路边植物中观察到更高的抗氧化活性和游离氨基酸含量，这可能是由于它们对交通污染物的防御反应。夹竹桃受交通污染物的影响更大，蓖麻表现出更强的抗性。因此，夹竹桃可用于生物监测，蓖麻可用于车辆污染的植物修复。
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