Article

Pollulion urban and suburban stress provoke a dilrerenl tendence towards lear plani sclerophylly. Sclerophylly and phenol compound synthesis appeared to be active respomnses in leaves of Citrus aurantium L., Cupressus sempervirens L., Ficus magnolioides Barzi, Myrtus communis L. , Nerium oleander L., Parietaria judaica L, Pinus pinea L, Platanus hybrida Brot.. Quercus ilex L. and cotyledon of Sinapis alba L., from sites located along polluted urban arcas or sea-spray polluted periurban areas or, in the end, subjected to magnetic treatment as Sinapis alba L. Our investigations have shown that some plants are better suited to a city environment, some have displastic cells (Pinus pinea L., Nerium oleander L.), other are able to accumulate air pollution or sea aereosol and their cells are not displastic, but are full of secondary metabolites (Cupressus sempervirens L., Ficus magnolioides Borzi, Parietaria judaica L., Platanus hybrida Brot.), others still show no sign of alteration, and almost all are prone to a higher (Myrtus communis L., Quercus ilex L.) or lower degree (Sinapis alba L.) or sclerophylly. Biostructural and spectrophotometric tests are carried out, paying particular attention to urban vehicolar lead concentrations.