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Leaf visible injury and biomass loss are adverse effects on plants due to an increase of the tropospheric ozone concentration over the Critical Level for vegetation, and represent a useful tool for air quality monitoring programmes. In this framework, research activities are largely based on open air exposure of plants differing in ozone sensitivity (sensitive and resistant clones). The main results of a trial using white clover clones (ozone-sensitive and ozone-resistant) and native white clover plants, carried out in a rural site not far from Piacenza (Northern Italy) over the 2001 summer season, are reported here.

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Authors: MARTIGNON G, CESOI SpA, Milano (IT);BELGIOVINE N, CESOI SpA, Milano (IT);MIGNANEGO L, PHYTOS Snc, Biassono (IT);FUMAGALLI I, European Commission, Joint Research Centre, Institute for Environment and Sustainability, Ispra (IT)
Bibliographic Reference: An oral report given at: 15th Task Force Meeting of the UN/ECE ICP Vegetation Organised by: United Nations Economic Commission for Europe, WGE ICP-Vegetation Held at: Trier (DE), 11-14 February 2002
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