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An assessment of dust accumulation and leaf morphology at roadside plants in Kathmandu Valley, Nepal

Author Affiliations

  • 1Central Department of Botany, Tribhuvan University, Kirtipur, Kathmandu Nepal
  • 2Central Department of Botany, Tribhuvan University, Kirtipur, Kathmandu Nepal

Int. Res. J. Environment Sci., Volume 10, Issue (2), Pages 45-51, April,22 (2021)


Air pollution is one of the serious environmental issues. The vehicular emissions have a very harmful effect on the environment, human health and ecology. This research was planned to assess dust deposition on leaves of two selected plants are Callistemon citrinus and Lagerstroemia indica growing along the roadside of a city having high traffic density and construction. The work determines the variation in dust deposition on leaves and different structure of leaf with respect to species, seasons and study sites. The study was conducted in these seasons, i.e. spring, summer, autumn and winter, during 2017 / 2018. In C. citrinus, the deposition of dust on leaf was highest in heavily polluted sites in all seasons. The dust deposition and the morphology of leaf show the interrelationship in the growth and development. If dust accumulation was increased then the growth was decreased instead if dust deposition was decreased then leaf growth was increased. In L. indica, the deposition of dust on leaf was highest in heavily polluted sites. In different seasons, the dust deposition and the value of morphology of leaf showing the interrelationship in the growth and development differently. It was because of different environmental factors. In heavily polluted site, some dust deposition result and with this the growth of morphology of leaf was decreased. The result about the deposition of dust and in the morphology (length, breadth, area and specific length area) indicated that it was affected from the environment and deposition of dust on leaf.


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