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This study reports the seasonal variations in dry deposition of coarse and fine particles on the foliar surfaces of common indoor plants viz.  Ficus elastica, Ficus lyrata,  and  Schefflera arboricola  along with their biochemical changes in the urban households of metropolitan Delhi. The dustfall fluxes were significantly higher at the industrial site as compared to residential site and temporal variations indicated higher dustfall fluxes during the winter months as compared to other seasons. Seasonal concentrations of chlorophylls, pH, and soluble sugars were higher during monsoon season for the indoor plants whereas ascorbic acid content was higher in the winter season indicating more stress. The results of correlation plots revealed that the variations observed in the biochemical traits were interlinked with the changes in dustfall fluxes during different seasons, thereby reflecting the changes in air pollution stress faced by plant foliage. The air pollution tolerance index and anticipated performance index were evaluated to understand the overall tolerance of indoor plants toward air pollution which can be utilized in phytoremediation techniques. It was concluded that among the studied indoor plants,  Ficus elastica  and  Ficus lyrata  are better plant species than  Schefflera arboricola  for improving indoor air quality.

Seasonal variations of dustfall fluxes and biochemical parameters in the foliage of selected indoor plants in Delhi, India