1Department of Biotechnology, College of Agriculture, S.V.B.P. University of Agriculture and Technology Meerut - 250110 (India).
2College of Biotechnology, S.V.B.P. University of Agriculture and Technology Meerut–250110 (India).
3G.B. Pant University of Agriculture and Technology Pant Nagar, U.S. Nagar, 263145 Uttranchal) India.
4Institute of Management Studies, C-238, Bulandshahr Road, Indl, Area, Lal Quan, G.T. Road, Ghaziabad – 201009 India.
Most plants possess well-characterized physiological and biochemical systems to absorb nitrogenous gases from the atmosphere and to assimilate the nitrogen into organic nitrogenous compounds. The system is often activated during the exposure of plants to low level of the gases with a concurrent increase in organic nitrogen content and growth of the plants. The nitrogenous gases however, are not the complete replacement of soil nitrogen or other usual modes of nitrogen nutrition and often the exposure to these gases at relatively higher concentrations results in some physiological and morphological aberrations in plants. Apparently, there are some unknown constraints on the optimum utilization of nitrogenous gases as sources of nutrient nitrogen, which are perhaps linked to their phytotoxic reactions.
Air polllution, phytotoxicity, nitrogen, assimiliation of pollutants, nitrogen dioxide, ammonium accumulation
