A novel method to evaluate the phytotoxic potential of low ozone concentrations using poplar cuttings |
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Authors: | Joseph Bücker Robert Guderian Jan Mooi |
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Institution: | 1. Institute of Applied Botany, University of Essen, Henri-Dunant-Str. 65, 4300, Essen, Germany 2. Institute of Applied Botany, University of Essen, Universit?tsstraβe 5, 4300, Essen, Germany 3. Research Institute for Plant Protection, P.O.B. 9060, 6700, GW Wageningen, The Netherlands
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Abstract: | Six-week-old rooted cuttings of Populus nigra L. ‘LOENEN’ and Populus maximowiczii Henri X Populus nigra L. ‘ROCHESTER’, differing in their phenomenological sensitivity to O3, were submitted to low concentrations of O3, NOx, and SO2. Exposure was performed in open top-chambers from 25.5. until 6.7.1988. Comparing the response of the two poplars by 77 biochemical criteria the macroscopic O3- sensitivity of ‘LOENEN’ was clearly reflected in changes of the pool sizes of the different nonstructural carbohydrates, polyols, and phenolics of the leaf-lamina, petiole, shoot-axis, and roots. In contrast, both varieties revealed the same response to NOx/SO2-mixtures. It can be concluded that ‘LOENEN’ together with ‘ROCHESTER’-poplars as controls, are an appropriate system to specifically indicate O3 in a mixture of air pollutants. |
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