Bioindicator Potential of Calatropis procera and Azadirachta indica Leaf Epidermal Traits for Monitoring Cement Dust Pollution
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Abstract
Airborne particulate pollution from cement industries represents a significant environmental stressor, adversely affecting plant physiology and altering leaf epidermal traits that serve as reliable biomarkers of pollution impact. This study investigated the effects of cement dust pollution on the leaf epidermal indices of Calotropis procera and Azadirachta indica collected from the vicinity of the Dangote Cement Company in Obajana, Kogi State. Epidermal peels were obtained using both chemical and mechanical methods, prepared on slides, and examined under a light microscope. The epidermal cells were analyzed for stomatal index, length, and breadth. Results revealed that the abaxial leaf surface of A. indica at the polluted site exhibited reductions in epidermal cell number (95.50), stomatal number (27.20), stomatal length (1.52), and stomatal breadth (1.42), compared with 103.30, 54.00, 1.80, and 1.58, respectively, at the control site, with differences being statistically significant (p < 0.05). Similarly, C. procera leaves showed marked modifications, including reduced epidermal cells (78.70), stomatal number (12.30), and stomatal breadth (1.26) on the abaxial surface, compared with 112.10, 40.60, and 1.44, respectively, at the control site, which were significantly different (p < 0.05). These alterations in epidermal indices of A. indica and C. procera highlight their potential as sensitive biomarkers for monitoring the impacts of cement dust and other airborne pollutants on living organisms
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References
Adeyemi, A. A., Oke, O. L. and Ajayi, A. A. (2021a). Air quality assessment around cement factories in Nigeria: A case study of Dangote Cement, Obajana. Environmental Monitoring and Assessment. 193(4):1-15.
Adeyemi, A. A., Ogunwande, I. J. and Eze, A. (2021b). Impact of cement dust pollution on the morphology and anatomy of selected plant species. Environmental Monitoring and Assessment. 193(7):1-11.
Eze, P. M., Onyekwelu, J. C. and Akinyemi, O. (2018a). The impact of dust pollution on plant health in urban areas: A review. Environmental Science and Pollution Research. 25(5):4572-4581.
Eze, A., Ogbonna, O. O. and Okwuosa, C. (2018b). Physiological and morphological responses of plants to cement dust pollution in Nigeria. Journal of Pollution Effects and Control. 6(1):1-7.
Ghosh, S., Kumar, A. and Soni, K. (2020a). Medicinal properties and economic importance of Calotropis procera: A review. Journal of Medicinal Plants Research. 14(3):45-54.
Ghosh, S., Chatterjee, S. and Ghosh, D. (2020b). The impact of environmental pollutants on the leaf structure of Calotropis procera. Environmental Science and Pollution Research. 27(8):8503-8510.
Kumar, A., Sharma, A. and Gupta, R. K. (2020a). Environmental impact of cement dust pollution on plant growth and development. Journal of Environmental Management. 261:110222.
Kumar, S., Kumar, P. and Singh, R. (2020b). Role of leaf epidermal characteristics in plant responses to air pollution. Plant Physiology and Biochemistry. 157:292-301.
Meena, S. K., Kumar, A. and Yadav, S. (2020). Impact of cement dust pollution on morphological and physiological characteristics of plants. Environmental Science and Pollution Research. 27(15):18479-18491.
Miralles-Pérez, B., Andrés-Camacho, C., Fernández-Espinosa, A. J. and Rossini-Oliva, S. (2025). Particulate matter and potentially toxic element content in urban ornamental plant species to assess pollutants trapping capacity. Journal of Environmental Management. 374:124058.
Nkansah, F. K., Belford, E. J. D. and Hogarh, J. N. (2025). Evaluation of urban tree species for air pollution control: integrating air pollution tolerance index (APTI), anticipated performance index (API), and socioeconomic value in Ghana’s Central Region. Research Square, 1-13. https://doi.org/10.21203/rs.3.rs-5813394/v1
Nsor, C. A., Joseph, F., Usim, N. J., Elaigwu, A. M., Oride, M. G., Patrick, D. and Abubakar, B. (2025). The effects of cement particulate discharge on two trees and a common shrub in Ashaka, Gombe State. FUDMA Journal of Sciences. 9(12):217–224.
Nwankwo, E. N., Eze, P. M. and Ugochukwu, E. F. (2022a). Impact of air pollution on leaf epidermal characteristics of economically important plants. International Journal of Environmental Science and Technology. 19(1):123-134.
Nwankwo, A., Eze, A. and Ugochukwu, N. (2022b). The effects of particulate matter on leaf morphology: A review. International Journal of Environmental Research and Public Health. 19(5):3050.
Ogundare, F. O., Oyekunle, J. A. and Ojo, O. O. (2021). Assessing the ecological impacts of industrial pollution through leaf structural changes: A case study. Applied Ecology and Environmental Research. 19(1):103-114.
Raghavendra, A. S., Babu, R. R. and Rao, P. M. (2021). Neem: A natural pesticide and its economic significance. Pest Management Science. 77(5):2381-2390.
Shakeel, T., Shah, G. M., Zeb, B. S., Gul, I., Irshad, M. and Zafar, H. (2025). Phytomining potential, micro-morphological assessment, and air pollution tolerance index of plant species in multi-metals contaminated soapstone and crushing stone mines. Science of The Total Environment. 975:179228.
Sharma, G., Singh, R. and Kumar, S. (2019a). Impact of cement dust on the morphology of Azadirachta indica and Calotropis procera. Plant Science Today. 6(2):130-135.
Sharma, S., Singh, R. and Gupta, A. (2019b). Effects of particulate matter pollution on leaf morphology and physiology of plants: A review. Environmental Science and Pollution Research. 26(16):16516-16529.
Singh, R., Kumar, S. and Meena, S. K. (2021). Effects of industrial pollutants on plant structure and function: A review. Journal of Environmental Management. 287:112308.
Tiwari, P. and Pandey, S. (2017). Impact of cement dust pollution on leaf anatomical features of Lantana camara and Calotropis procera. Current Science International. 6:34-40.