چكيده لاتين :
The experiments were conducted in open top chamber system installed at the University of the Punjab,
Quaid-e-Azarn Campus, Lahore, Pakistan, The mungbean (Vigna radiata (L) Wilczek var.M28) seeds were sown in
earthen pots and were kept in filtered air, unfiltered air and ambient air. The ozone concentration was monitored daily
during 1000hrs till 1600 h. The data for light intensity and relative humidity was also regularly collected. The sets of
plants growing in FA chambers (without ozone and dust particles) responded well as regards growth and yields are
concerned. Unfiltered air reduced the number of nodules, their biomass and nitroginase activity in mungbean plants.
The present study documents that the species of mycorrhizal fungi sensitive to tropospheric ozone failed to reproduce
in ambient air and unfiltered air chambers (without dust particles). Out of a total of 24 species, eighteen species
belonged to the genus Glomus, two each to Sclerocystis, to Acaulospora and one each to Gigaspora and Sculel/ospora.
The total number of species was variable during the growth phase. The total number of species reduced in soil of UFA
chambers with the passage of time. Species richness reduced to almost half in UFA plants as compared to FA plants.
Species of the Genus Glomus were highly abundant species at various harvests in all air treatments. Amongst most
abundantly recovered Glomus species were Gfasciculalum, G mosseae, G aggregatum, G caledonicum, G deserticola,
G geosporum, and G monosporum. The pattern of abundance kept on varying at various harvests for different air and
mycorrhizal treatments. In the case of plants of UFA treatment, only two species of Glomus were abundant namely
G.fasciculatum and G. geosporum. SpeciesofAcaulospora and Gigaspora in particular and Sculel/ospora and Sclerocyslis
in general were sensitive to polluted air.
