Use of the antiozonant ethylenediurea (EDU) in Italy: verification of the effects of ambient ozone on crop plants and trees and investigation of EDU's mode of action |
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Authors: | Paoletti Elena Contran Nicla Manning William J Ferrara Anna M |
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Institution: | a IPP-CNR, Via Madonna del Piano 10, I-50019 Sesto Fiorentino, Florence, Italy b Department of Biotechnology and Biology, University of Milano-Bicocca, Piazza della Scienza 1, Milan, Italy c Department of Plant, Soil and Insect Sciences, University of Massachusetts, Amherst, MA 01003-9320, USA d IPLA, Corso Casale 476, I-10128 Turin, Italy |
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Abstract: | Twenty-four experiments where EDU was used to protect plants from ozone (O3) in Italy are reviewed. Doses of 150 and 450 ppm EDU at 2-3 week intervals were successfully applied to alleviate O3-caused visible injury and growth reductions in crop and forest species respectively. EDU was mainly applied as soil drench to crops and by stem injection or infusion into trees. Visible injury was delayed and reduced but not completely. In investigations on mode of action, EDU was quickly (<2 h) uptaken and translocated to the leaf apoplast where it persisted long (>8 days), as it cannot move via phloem. EDU did not enter cells, suggesting it does not directly affect cell metabolism. EDU delayed senescence, did not affect photosynthesis and foliar nitrogen content, and stimulated antioxidant responses to O3 exposure. Preliminary results suggest developing an effective soil application method for forest trees is warranted. |
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Keywords: | EDU Ethylenediurea Ambient ozone Trees Crops Mode of action |
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