Protection of ash (Fraxinus excelsior) trees from ozone injury by ethylenediurea (EDU): roles of biochemical changes and decreased stomatal conductance in enhancement of growth (Articolo in rivista)

Type
Label
  • Protection of ash (Fraxinus excelsior) trees from ozone injury by ethylenediurea (EDU): roles of biochemical changes and decreased stomatal conductance in enhancement of growth (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Alternative label
  • Paoletti E., Contran N., Manning W.J., Castagna A., Ranieri A., Tagliaferro F. (2008)
    Protection of ash (Fraxinus excelsior) trees from ozone injury by ethylenediurea (EDU): roles of biochemical changes and decreased stomatal conductance in enhancement of growth
    in Environmental pollution (1987)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Paoletti E., Contran N., Manning W.J., Castagna A., Ranieri A., Tagliaferro F. (literal)
Pagina inizio
  • 464 (literal)
Pagina fine
  • 472 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 155 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • - Paoletti E., CNR, Istituto per la Protezione delle Piante, Sezione di Firenze, Via Madonna del Piano 10, 50019 Sesto Fiorentino (FI), Italia - Contran N., Univ Milano Bicocca, Dept Environm Sci, Milan, Italy - Manning W.J., Univ Massachusetts, Dept Plant Soil & Insect Sci, Amherst, MA 01003 USA - Castagna A., Ranieri A., Univ Pisa, Dept Agr Chem & Biotechnol, Pisa, Italy - Tagliaferro F., IPLA, I-10128 Turin, Italy (literal)
Titolo
  • Protection of ash (Fraxinus excelsior) trees from ozone injury by ethylenediurea (EDU): roles of biochemical changes and decreased stomatal conductance in enhancement of growth (literal)
Abstract
  • Treatments with ethylenediurea (EDU) protect plants from ozone foliar injury, but the processes underlying this protection are poorly understood. Adult ash trees (Fraxinus excelsior), with or without foliar ozone symptoms in previous years, were treated with EDU at 450 ppm by gravitational trunk infusion in May┬ľSeptember 2005 (32.5 ppm h AOT40). At 30-day intervals, shoot growth, gas exchange, chlorophyll a fluorescence, and water potential were determined. In September, several biochemical parameters were measured. The protective influence of EDU was supported by enhancement in the number of leaflets. EDU did not contribute its nitrogen to leaf tissue as a fertiliser, as determined from lack of difference in foliar N between treatments. Both biochemical (increase in ascorbate-peroxidase and ascorbic acid, and decrease in apoplastic hydrogen peroxide) and biophysical (decrease in stomatal conductance) processes regulated EDU action. As total ascorbic acid increased only in the asymptomatic trees, its role in alleviating O3 effects on leaf growth and visible injury is controversial. Both biochemical and biophysical processes may regulate EDU action. (literal)
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