Full title: Gaseous ammonia and oxides of nitrogen can lead to both a stimulation and a reduction in plant growth. Using examples of effects at both the cellular and whole plant level, discuss the relative merits/disadvantages of life in a polluted environment. Introduction: Major sources for ammonia (NH3) emissions are connected with areas of intensive agriculture and high rates of fertilizer manufacture and application. Fertiliser is often applied as ammonium or urea. During combustion, …showed first 75 words of 1645 total…

…showed last 75 words of 1645 total…B. & Treshow, M. (2002) Air Pollution and Plant Life. John Wiley & Sons, Ltd. Pearson, J. & Stewart, G.R. (1993) The deposition of atmospheric ammonia and its effects on plants. New Phytologist, 125, 283-305. Wellburn, A.R. (1990) Why are atmospheric oxides of nitrogen usually phytotoxic and not alternative fertilisers? New Phytologist, 115, 395-429. Wellburn, A.R. (1998) Atmospheric nitrogenous compounds and ozone - is NOx fixation by plants a possible solution? New Phytologist, 139, 5-9. *As quoted by Wellburn (1990).