~ 500 ~  The Pharma Innovation Journal 2017; 6(12): 500-504 ISSN (E): 2277- 7695 ISSN (P): 2349-8242 NAAS Rating 2017: 5.03 TPI 2017; 6(12): 500-504 © 2017 TPI www.thepharmajournal.com Received: 10-10-2017 Accepted: 11-11-2017 Shweta Tiwari Assistant Professor & Head, Department of Seed Technology Shri Jain Diwakar College, Indore, M.P., India Jai Prakash Gupta Assistant Professor, Department of Seed Technology Shri Jain Diwakar College, Indore, M.P., India Ashish Singh Research Scholar, Narendra Deva University of Agriculture & Technology Kumarganj, Faizabad, Uttar Pradesh, India Correspondence Shweta Tiwari Assistant Professor & Head, Department of Seed Technology Shri Jain Diwakar College, Indore, M.P., India Foliar response of two species of heavy air pollution load at Indore city Shweta Tiwari, Jai Prakash Gupta and Ashish Singh Abstract Plants are constantly exposed to air, they absorb, accumulate and integrate pollutants confining on their foliar surfaces and show specific response too. The use of plants as monitors of air pollution has long been established, as plants are the initial acceptors of air pollution. Present study was carried out to find out the effect of air pollutants on morphology, physiology and biochemistry of Bauhinia Purpurea Lamk. and Eucalyptus Citriodora var. Maculata Hook. growing at two different sites of Indore city viz. Scheme No. 78 (Site-I), considered as Low Polluted Area (LPA), in this area there is very low traffic frequency and industries are absent and MR-10 (Site-II) which is Major Road No. 10 of Indore city. There are large number of Industries and heavy traffic frequency in this area, so it is considered as a polluted area. The two species growing at polluted site showed reduction in size of leaf, number of stomata and leaf biomass. Variations in biochemical parameters like chlorophyll in the leaves were found to be pollution load dependent. Keywords: Air pollution, Low polluted area (LPA), Heavy polluted area (HPA), Foliar morphology Introduction Pollution has posed a very vital question for our survival as we are continuously altering the environment to satisfy our needs. Unplanned industrialization, faster means of transportation, urbanization and ruthless exploitation of natural resources have caused severe environmental crisis by polluting air, water and soil. Air pollution on morphology, physiology and biochemistry of plants. Leaf is the plant part which is most sensitive and constantly exposed to air pollution. The pollution indicator value of the leaf has been studied by a large number of workers.1 Air pollution leads to reduction in plant growth and yield resulting in great damage to economic crops all over the world. Air pollutants adversely affect the plant. Different plant species react differently when exposed to air pollution. Plants provide an enormous leaf area for impingement, adsorption and accumulation of air pollutants. Plants are efficient bioindicators of the type and load of pollution in an area and can be used as a convenient source for environmental monitoring. Air pollution may lead to blocked stomata, increased leaf temperature, reduced photosynthesis, fruit setting, leaf growth, pollen growth and tree growth, leaf necrosis, chlorosis and bark peeling in plants. Air pollution is one of the most severe environmental problems of the world today. Clean air is a mixture of gases such as 78% Nitrogen, 21% Oxygen, 1% Argon, 0.03% Carbon dioxide, very minor traces of helium, methane, krypton and 1.3% of water vapours by volume. Any rise in its component is considered as a kind of air pollution which may have widespread ecological implication on global scale. Air pollution is influenced by four major factors, namely industrialized expansion of the cities, increase in traffic, rapid economic development and higher level of energy consumption. The atmosphere is a dynamic system that continuously absorbs a wide range of solids, liquids and gases. These substances travel through air, disperse and react with one another both physically and chemically. When their rate of formation is faster than rate of dispersion, they enter into the atmosphere and accumulate in air causing environmental decay. The combustion of fuels add substantial quantities of oxides of nitrogen and sulphur into atmosphere. These primary pollutants react photo chemically in the atmosphere forming Ozone, Peroxy Acetyl Nitrate (PAN) and acid rain as by product. This creates ecotoxic effects on terrestrial and aquatic flora and fauna, especially on endangered species and sensitive ecosystems. To know the impact of air pollution on these plant Species various parameters were studied. These were Fresh weight, Dry weight, L/B ratio, Specific Leaf Area, Stomatal Size,